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![Steven J. Hill](/assets/img/avatar_default.png)
IDE PIO calculates the size wrong when passing the parameter "ide-core.nodma=0.0" to the kernel. Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Acked-by: Steven J. Hill <Steven.Hill@imgtec.com> Signed-off-by: Steven J. Hill <sjhill@mips.com> Signed-off-by: David S. Miller <davem@davemloft.net>
674 lines
17 KiB
C
674 lines
17 KiB
C
/*
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* Copyright (C) 2000-2002 Michael Cornwell <cornwell@acm.org>
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* Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
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* Copyright (C) 2001-2002 Klaus Smolin
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* IBM Storage Technology Division
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* Copyright (C) 2003-2004, 2007 Bartlomiej Zolnierkiewicz
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*
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* The big the bad and the ugly.
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*/
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/export.h>
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#include <linux/sched.h>
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#include <linux/interrupt.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/hdreg.h>
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#include <linux/ide.h>
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#include <linux/scatterlist.h>
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#include <linux/uaccess.h>
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#include <asm/io.h>
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void ide_tf_readback(ide_drive_t *drive, struct ide_cmd *cmd)
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{
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ide_hwif_t *hwif = drive->hwif;
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const struct ide_tp_ops *tp_ops = hwif->tp_ops;
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/* Be sure we're looking at the low order bytes */
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tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
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tp_ops->tf_read(drive, &cmd->tf, cmd->valid.in.tf);
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if (cmd->tf_flags & IDE_TFLAG_LBA48) {
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tp_ops->write_devctl(hwif, ATA_HOB | ATA_DEVCTL_OBS);
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tp_ops->tf_read(drive, &cmd->hob, cmd->valid.in.hob);
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}
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}
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void ide_tf_dump(const char *s, struct ide_cmd *cmd)
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{
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#ifdef DEBUG
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printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
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"lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n",
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s, cmd->tf.feature, cmd->tf.nsect,
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cmd->tf.lbal, cmd->tf.lbam, cmd->tf.lbah,
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cmd->tf.device, cmd->tf.command);
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printk("%s: hob: nsect 0x%02x lbal 0x%02x lbam 0x%02x lbah 0x%02x\n",
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s, cmd->hob.nsect, cmd->hob.lbal, cmd->hob.lbam, cmd->hob.lbah);
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#endif
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}
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int taskfile_lib_get_identify(ide_drive_t *drive, u8 *buf)
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{
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struct ide_cmd cmd;
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memset(&cmd, 0, sizeof(cmd));
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cmd.tf.nsect = 0x01;
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if (drive->media == ide_disk)
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cmd.tf.command = ATA_CMD_ID_ATA;
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else
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cmd.tf.command = ATA_CMD_ID_ATAPI;
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cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
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cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
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cmd.protocol = ATA_PROT_PIO;
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return ide_raw_taskfile(drive, &cmd, buf, 1);
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}
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static ide_startstop_t task_no_data_intr(ide_drive_t *);
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static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct ide_cmd *);
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static ide_startstop_t task_pio_intr(ide_drive_t *);
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ide_startstop_t do_rw_taskfile(ide_drive_t *drive, struct ide_cmd *orig_cmd)
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{
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ide_hwif_t *hwif = drive->hwif;
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struct ide_cmd *cmd = &hwif->cmd;
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struct ide_taskfile *tf = &cmd->tf;
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ide_handler_t *handler = NULL;
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const struct ide_tp_ops *tp_ops = hwif->tp_ops;
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const struct ide_dma_ops *dma_ops = hwif->dma_ops;
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if (orig_cmd->protocol == ATA_PROT_PIO &&
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(orig_cmd->tf_flags & IDE_TFLAG_MULTI_PIO) &&
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drive->mult_count == 0) {
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pr_err("%s: multimode not set!\n", drive->name);
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return ide_stopped;
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}
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if (orig_cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
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orig_cmd->ftf_flags |= IDE_FTFLAG_SET_IN_FLAGS;
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memcpy(cmd, orig_cmd, sizeof(*cmd));
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if ((cmd->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) {
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ide_tf_dump(drive->name, cmd);
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tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
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if (cmd->ftf_flags & IDE_FTFLAG_OUT_DATA) {
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u8 data[2] = { cmd->tf.data, cmd->hob.data };
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tp_ops->output_data(drive, cmd, data, 2);
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}
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if (cmd->valid.out.tf & IDE_VALID_DEVICE) {
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u8 HIHI = (cmd->tf_flags & IDE_TFLAG_LBA48) ?
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0xE0 : 0xEF;
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if (!(cmd->ftf_flags & IDE_FTFLAG_FLAGGED))
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cmd->tf.device &= HIHI;
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cmd->tf.device |= drive->select;
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}
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tp_ops->tf_load(drive, &cmd->hob, cmd->valid.out.hob);
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tp_ops->tf_load(drive, &cmd->tf, cmd->valid.out.tf);
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}
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switch (cmd->protocol) {
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case ATA_PROT_PIO:
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if (cmd->tf_flags & IDE_TFLAG_WRITE) {
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tp_ops->exec_command(hwif, tf->command);
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ndelay(400); /* FIXME */
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return pre_task_out_intr(drive, cmd);
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}
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handler = task_pio_intr;
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/* fall-through */
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case ATA_PROT_NODATA:
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if (handler == NULL)
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handler = task_no_data_intr;
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ide_execute_command(drive, cmd, handler, WAIT_WORSTCASE);
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return ide_started;
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case ATA_PROT_DMA:
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if (ide_dma_prepare(drive, cmd))
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return ide_stopped;
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hwif->expiry = dma_ops->dma_timer_expiry;
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ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD);
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dma_ops->dma_start(drive);
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default:
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return ide_started;
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}
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}
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EXPORT_SYMBOL_GPL(do_rw_taskfile);
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static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
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{
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ide_hwif_t *hwif = drive->hwif;
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struct ide_cmd *cmd = &hwif->cmd;
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struct ide_taskfile *tf = &cmd->tf;
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int custom = (cmd->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) ? 1 : 0;
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int retries = (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) ? 5 : 1;
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u8 stat;
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local_irq_enable_in_hardirq();
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while (1) {
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stat = hwif->tp_ops->read_status(hwif);
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if ((stat & ATA_BUSY) == 0 || retries-- == 0)
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break;
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udelay(10);
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};
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if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
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if (custom && tf->command == ATA_CMD_SET_MULTI) {
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drive->mult_req = drive->mult_count = 0;
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drive->special_flags |= IDE_SFLAG_RECALIBRATE;
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(void)ide_dump_status(drive, __func__, stat);
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return ide_stopped;
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} else if (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) {
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if ((stat & (ATA_ERR | ATA_DRQ)) == 0) {
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ide_set_handler(drive, &task_no_data_intr,
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WAIT_WORSTCASE);
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return ide_started;
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}
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}
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return ide_error(drive, "task_no_data_intr", stat);
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}
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if (custom && tf->command == ATA_CMD_SET_MULTI)
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drive->mult_count = drive->mult_req;
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if (custom == 0 || tf->command == ATA_CMD_IDLEIMMEDIATE ||
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tf->command == ATA_CMD_CHK_POWER) {
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struct request *rq = hwif->rq;
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if (blk_pm_request(rq))
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ide_complete_pm_rq(drive, rq);
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else
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ide_finish_cmd(drive, cmd, stat);
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}
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return ide_stopped;
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}
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static u8 wait_drive_not_busy(ide_drive_t *drive)
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{
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ide_hwif_t *hwif = drive->hwif;
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int retries;
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u8 stat;
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/*
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* Last sector was transferred, wait until device is ready. This can
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* take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
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*/
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for (retries = 0; retries < 1000; retries++) {
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stat = hwif->tp_ops->read_status(hwif);
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if (stat & ATA_BUSY)
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udelay(10);
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else
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break;
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}
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if (stat & ATA_BUSY)
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pr_err("%s: drive still BUSY!\n", drive->name);
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return stat;
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}
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void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
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unsigned int write, unsigned int len)
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{
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ide_hwif_t *hwif = drive->hwif;
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struct scatterlist *sg = hwif->sg_table;
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struct scatterlist *cursg = cmd->cursg;
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unsigned long uninitialized_var(flags);
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struct page *page;
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unsigned int offset;
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u8 *buf;
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cursg = cmd->cursg;
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if (cursg == NULL)
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cursg = cmd->cursg = sg;
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while (len) {
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unsigned nr_bytes = min(len, cursg->length - cmd->cursg_ofs);
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int page_is_high;
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page = sg_page(cursg);
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offset = cursg->offset + cmd->cursg_ofs;
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/* get the current page and offset */
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page = nth_page(page, (offset >> PAGE_SHIFT));
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offset %= PAGE_SIZE;
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nr_bytes = min_t(unsigned, nr_bytes, (PAGE_SIZE - offset));
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page_is_high = PageHighMem(page);
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if (page_is_high)
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local_irq_save(flags);
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buf = kmap_atomic(page) + offset;
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cmd->nleft -= nr_bytes;
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cmd->cursg_ofs += nr_bytes;
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if (cmd->cursg_ofs == cursg->length) {
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cursg = cmd->cursg = sg_next(cmd->cursg);
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cmd->cursg_ofs = 0;
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}
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/* do the actual data transfer */
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if (write)
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hwif->tp_ops->output_data(drive, cmd, buf, nr_bytes);
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else
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hwif->tp_ops->input_data(drive, cmd, buf, nr_bytes);
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kunmap_atomic(buf);
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if (page_is_high)
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local_irq_restore(flags);
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len -= nr_bytes;
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}
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}
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EXPORT_SYMBOL_GPL(ide_pio_bytes);
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static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
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unsigned int write)
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{
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unsigned int nr_bytes;
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u8 saved_io_32bit = drive->io_32bit;
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if (cmd->tf_flags & IDE_TFLAG_FS)
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cmd->rq->errors = 0;
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if (cmd->tf_flags & IDE_TFLAG_IO_16BIT)
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drive->io_32bit = 0;
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touch_softlockup_watchdog();
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if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
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nr_bytes = min_t(unsigned, cmd->nleft, drive->mult_count << 9);
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else
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nr_bytes = SECTOR_SIZE;
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ide_pio_bytes(drive, cmd, write, nr_bytes);
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drive->io_32bit = saved_io_32bit;
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}
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static void ide_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
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{
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if (cmd->tf_flags & IDE_TFLAG_FS) {
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int nr_bytes = cmd->nbytes - cmd->nleft;
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if (cmd->protocol == ATA_PROT_PIO &&
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((cmd->tf_flags & IDE_TFLAG_WRITE) || cmd->nleft == 0)) {
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if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
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nr_bytes -= drive->mult_count << 9;
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else
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nr_bytes -= SECTOR_SIZE;
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}
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if (nr_bytes > 0)
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ide_complete_rq(drive, 0, nr_bytes);
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}
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}
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void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat)
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{
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struct request *rq = drive->hwif->rq;
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u8 err = ide_read_error(drive), nsect = cmd->tf.nsect;
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u8 set_xfer = !!(cmd->tf_flags & IDE_TFLAG_SET_XFER);
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ide_complete_cmd(drive, cmd, stat, err);
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rq->errors = err;
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if (err == 0 && set_xfer) {
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ide_set_xfer_rate(drive, nsect);
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ide_driveid_update(drive);
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}
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ide_complete_rq(drive, err ? -EIO : 0, blk_rq_bytes(rq));
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}
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/*
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* Handler for command with PIO data phase.
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*/
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static ide_startstop_t task_pio_intr(ide_drive_t *drive)
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{
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ide_hwif_t *hwif = drive->hwif;
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struct ide_cmd *cmd = &drive->hwif->cmd;
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u8 stat = hwif->tp_ops->read_status(hwif);
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u8 write = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
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if (write == 0) {
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/* Error? */
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if (stat & ATA_ERR)
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goto out_err;
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/* Didn't want any data? Odd. */
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if ((stat & ATA_DRQ) == 0) {
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/* Command all done? */
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if (OK_STAT(stat, ATA_DRDY, ATA_BUSY))
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goto out_end;
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/* Assume it was a spurious irq */
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goto out_wait;
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}
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} else {
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if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
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goto out_err;
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/* Deal with unexpected ATA data phase. */
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if (((stat & ATA_DRQ) == 0) ^ (cmd->nleft == 0))
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goto out_err;
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}
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if (write && cmd->nleft == 0)
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goto out_end;
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/* Still data left to transfer. */
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ide_pio_datablock(drive, cmd, write);
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/* Are we done? Check status and finish transfer. */
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if (write == 0 && cmd->nleft == 0) {
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stat = wait_drive_not_busy(drive);
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if (!OK_STAT(stat, 0, BAD_STAT))
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goto out_err;
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goto out_end;
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}
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out_wait:
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/* Still data left to transfer. */
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ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
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return ide_started;
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out_end:
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if ((cmd->tf_flags & IDE_TFLAG_FS) == 0)
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ide_finish_cmd(drive, cmd, stat);
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else
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ide_complete_rq(drive, 0, blk_rq_sectors(cmd->rq) << 9);
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return ide_stopped;
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out_err:
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ide_error_cmd(drive, cmd);
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return ide_error(drive, __func__, stat);
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}
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static ide_startstop_t pre_task_out_intr(ide_drive_t *drive,
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struct ide_cmd *cmd)
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{
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ide_startstop_t startstop;
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if (ide_wait_stat(&startstop, drive, ATA_DRQ,
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drive->bad_wstat, WAIT_DRQ)) {
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pr_err("%s: no DRQ after issuing %sWRITE%s\n", drive->name,
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(cmd->tf_flags & IDE_TFLAG_MULTI_PIO) ? "MULT" : "",
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(drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
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return startstop;
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}
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if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
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local_irq_disable();
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ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
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ide_pio_datablock(drive, cmd, 1);
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return ide_started;
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}
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int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
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u16 nsect)
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{
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struct request *rq;
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int error;
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int rw = !(cmd->tf_flags & IDE_TFLAG_WRITE) ? READ : WRITE;
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rq = blk_get_request(drive->queue, rw, __GFP_WAIT);
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rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
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/*
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* (ks) We transfer currently only whole sectors.
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* This is suffient for now. But, it would be great,
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* if we would find a solution to transfer any size.
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* To support special commands like READ LONG.
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*/
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if (nsect) {
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error = blk_rq_map_kern(drive->queue, rq, buf,
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nsect * SECTOR_SIZE, __GFP_WAIT);
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if (error)
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goto put_req;
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}
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rq->special = cmd;
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cmd->rq = rq;
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error = blk_execute_rq(drive->queue, NULL, rq, 0);
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put_req:
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blk_put_request(rq);
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return error;
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}
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EXPORT_SYMBOL(ide_raw_taskfile);
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int ide_no_data_taskfile(ide_drive_t *drive, struct ide_cmd *cmd)
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{
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cmd->protocol = ATA_PROT_NODATA;
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return ide_raw_taskfile(drive, cmd, NULL, 0);
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}
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EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
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#ifdef CONFIG_IDE_TASK_IOCTL
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int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
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{
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ide_task_request_t *req_task;
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struct ide_cmd cmd;
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u8 *outbuf = NULL;
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u8 *inbuf = NULL;
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u8 *data_buf = NULL;
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int err = 0;
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int tasksize = sizeof(struct ide_task_request_s);
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unsigned int taskin = 0;
|
|
unsigned int taskout = 0;
|
|
u16 nsect = 0;
|
|
char __user *buf = (char __user *)arg;
|
|
|
|
req_task = memdup_user(buf, tasksize);
|
|
if (IS_ERR(req_task))
|
|
return PTR_ERR(req_task);
|
|
|
|
taskout = req_task->out_size;
|
|
taskin = req_task->in_size;
|
|
|
|
if (taskin > 65536 || taskout > 65536) {
|
|
err = -EINVAL;
|
|
goto abort;
|
|
}
|
|
|
|
if (taskout) {
|
|
int outtotal = tasksize;
|
|
outbuf = kzalloc(taskout, GFP_KERNEL);
|
|
if (outbuf == NULL) {
|
|
err = -ENOMEM;
|
|
goto abort;
|
|
}
|
|
if (copy_from_user(outbuf, buf + outtotal, taskout)) {
|
|
err = -EFAULT;
|
|
goto abort;
|
|
}
|
|
}
|
|
|
|
if (taskin) {
|
|
int intotal = tasksize + taskout;
|
|
inbuf = kzalloc(taskin, GFP_KERNEL);
|
|
if (inbuf == NULL) {
|
|
err = -ENOMEM;
|
|
goto abort;
|
|
}
|
|
if (copy_from_user(inbuf, buf + intotal, taskin)) {
|
|
err = -EFAULT;
|
|
goto abort;
|
|
}
|
|
}
|
|
|
|
memset(&cmd, 0, sizeof(cmd));
|
|
|
|
memcpy(&cmd.hob, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
|
|
memcpy(&cmd.tf, req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
|
|
|
|
cmd.valid.out.tf = IDE_VALID_DEVICE;
|
|
cmd.valid.in.tf = IDE_VALID_DEVICE | IDE_VALID_IN_TF;
|
|
cmd.tf_flags = IDE_TFLAG_IO_16BIT;
|
|
|
|
if (drive->dev_flags & IDE_DFLAG_LBA48) {
|
|
cmd.tf_flags |= IDE_TFLAG_LBA48;
|
|
cmd.valid.in.hob = IDE_VALID_IN_HOB;
|
|
}
|
|
|
|
if (req_task->out_flags.all) {
|
|
cmd.ftf_flags |= IDE_FTFLAG_FLAGGED;
|
|
|
|
if (req_task->out_flags.b.data)
|
|
cmd.ftf_flags |= IDE_FTFLAG_OUT_DATA;
|
|
|
|
if (req_task->out_flags.b.nsector_hob)
|
|
cmd.valid.out.hob |= IDE_VALID_NSECT;
|
|
if (req_task->out_flags.b.sector_hob)
|
|
cmd.valid.out.hob |= IDE_VALID_LBAL;
|
|
if (req_task->out_flags.b.lcyl_hob)
|
|
cmd.valid.out.hob |= IDE_VALID_LBAM;
|
|
if (req_task->out_flags.b.hcyl_hob)
|
|
cmd.valid.out.hob |= IDE_VALID_LBAH;
|
|
|
|
if (req_task->out_flags.b.error_feature)
|
|
cmd.valid.out.tf |= IDE_VALID_FEATURE;
|
|
if (req_task->out_flags.b.nsector)
|
|
cmd.valid.out.tf |= IDE_VALID_NSECT;
|
|
if (req_task->out_flags.b.sector)
|
|
cmd.valid.out.tf |= IDE_VALID_LBAL;
|
|
if (req_task->out_flags.b.lcyl)
|
|
cmd.valid.out.tf |= IDE_VALID_LBAM;
|
|
if (req_task->out_flags.b.hcyl)
|
|
cmd.valid.out.tf |= IDE_VALID_LBAH;
|
|
} else {
|
|
cmd.valid.out.tf |= IDE_VALID_OUT_TF;
|
|
if (cmd.tf_flags & IDE_TFLAG_LBA48)
|
|
cmd.valid.out.hob |= IDE_VALID_OUT_HOB;
|
|
}
|
|
|
|
if (req_task->in_flags.b.data)
|
|
cmd.ftf_flags |= IDE_FTFLAG_IN_DATA;
|
|
|
|
if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE) {
|
|
/* fixup data phase if needed */
|
|
if (req_task->data_phase == TASKFILE_IN_DMAQ ||
|
|
req_task->data_phase == TASKFILE_IN_DMA)
|
|
cmd.tf_flags |= IDE_TFLAG_WRITE;
|
|
}
|
|
|
|
cmd.protocol = ATA_PROT_DMA;
|
|
|
|
switch (req_task->data_phase) {
|
|
case TASKFILE_MULTI_OUT:
|
|
if (!drive->mult_count) {
|
|
/* (hs): give up if multcount is not set */
|
|
pr_err("%s: %s Multimode Write multcount is not set\n",
|
|
drive->name, __func__);
|
|
err = -EPERM;
|
|
goto abort;
|
|
}
|
|
cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
|
|
/* fall through */
|
|
case TASKFILE_OUT:
|
|
cmd.protocol = ATA_PROT_PIO;
|
|
/* fall through */
|
|
case TASKFILE_OUT_DMAQ:
|
|
case TASKFILE_OUT_DMA:
|
|
cmd.tf_flags |= IDE_TFLAG_WRITE;
|
|
nsect = taskout / SECTOR_SIZE;
|
|
data_buf = outbuf;
|
|
break;
|
|
case TASKFILE_MULTI_IN:
|
|
if (!drive->mult_count) {
|
|
/* (hs): give up if multcount is not set */
|
|
pr_err("%s: %s Multimode Read multcount is not set\n",
|
|
drive->name, __func__);
|
|
err = -EPERM;
|
|
goto abort;
|
|
}
|
|
cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
|
|
/* fall through */
|
|
case TASKFILE_IN:
|
|
cmd.protocol = ATA_PROT_PIO;
|
|
/* fall through */
|
|
case TASKFILE_IN_DMAQ:
|
|
case TASKFILE_IN_DMA:
|
|
nsect = taskin / SECTOR_SIZE;
|
|
data_buf = inbuf;
|
|
break;
|
|
case TASKFILE_NO_DATA:
|
|
cmd.protocol = ATA_PROT_NODATA;
|
|
break;
|
|
default:
|
|
err = -EFAULT;
|
|
goto abort;
|
|
}
|
|
|
|
if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
|
|
nsect = 0;
|
|
else if (!nsect) {
|
|
nsect = (cmd.hob.nsect << 8) | cmd.tf.nsect;
|
|
|
|
if (!nsect) {
|
|
pr_err("%s: in/out command without data\n",
|
|
drive->name);
|
|
err = -EFAULT;
|
|
goto abort;
|
|
}
|
|
}
|
|
|
|
err = ide_raw_taskfile(drive, &cmd, data_buf, nsect);
|
|
|
|
memcpy(req_task->hob_ports, &cmd.hob, HDIO_DRIVE_HOB_HDR_SIZE - 2);
|
|
memcpy(req_task->io_ports, &cmd.tf, HDIO_DRIVE_TASK_HDR_SIZE);
|
|
|
|
if ((cmd.ftf_flags & IDE_FTFLAG_SET_IN_FLAGS) &&
|
|
req_task->in_flags.all == 0) {
|
|
req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
|
|
if (drive->dev_flags & IDE_DFLAG_LBA48)
|
|
req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
|
|
}
|
|
|
|
if (copy_to_user(buf, req_task, tasksize)) {
|
|
err = -EFAULT;
|
|
goto abort;
|
|
}
|
|
if (taskout) {
|
|
int outtotal = tasksize;
|
|
if (copy_to_user(buf + outtotal, outbuf, taskout)) {
|
|
err = -EFAULT;
|
|
goto abort;
|
|
}
|
|
}
|
|
if (taskin) {
|
|
int intotal = tasksize + taskout;
|
|
if (copy_to_user(buf + intotal, inbuf, taskin)) {
|
|
err = -EFAULT;
|
|
goto abort;
|
|
}
|
|
}
|
|
abort:
|
|
kfree(req_task);
|
|
kfree(outbuf);
|
|
kfree(inbuf);
|
|
|
|
return err;
|
|
}
|
|
#endif
|