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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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d85cad420a
Fix checkpatch warning "Alignment should match open parenthesis". Signed-off-by: Pragat Pandya <pragat.pandya@gmail.com> Link: https://lore.kernel.org/r/20200111142233.11354-1-pragat.pandya@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
136 lines
3.1 KiB
C
136 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
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*/
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#include <linux/blkdev.h>
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#include <linux/buffer_head.h>
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#include <linux/fs.h>
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#include "exfat.h"
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void exfat_bdev_open(struct super_block *sb)
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{
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struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
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if (p_bd->opened)
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return;
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p_bd->sector_size = bdev_logical_block_size(sb->s_bdev);
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p_bd->sector_size_bits = ilog2(p_bd->sector_size);
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p_bd->sector_size_mask = p_bd->sector_size - 1;
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p_bd->num_sectors = i_size_read(sb->s_bdev->bd_inode) >>
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p_bd->sector_size_bits;
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p_bd->opened = true;
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}
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void exfat_bdev_close(struct super_block *sb)
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{
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struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
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p_bd->opened = false;
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}
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int exfat_bdev_read(struct super_block *sb, sector_t secno, struct buffer_head **bh,
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u32 num_secs, bool read)
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{
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struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
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struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
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#ifdef CONFIG_STAGING_EXFAT_KERNEL_DEBUG
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struct exfat_sb_info *sbi = EXFAT_SB(sb);
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long flags = sbi->debug_flags;
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if (flags & EXFAT_DEBUGFLAGS_ERROR_RW)
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return -EIO;
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#endif /* CONFIG_STAGING_EXFAT_KERNEL_DEBUG */
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if (!p_bd->opened)
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return -ENODEV;
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if (*bh)
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__brelse(*bh);
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if (read)
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*bh = __bread(sb->s_bdev, secno,
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num_secs << p_bd->sector_size_bits);
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else
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*bh = __getblk(sb->s_bdev, secno,
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num_secs << p_bd->sector_size_bits);
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if (*bh)
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return 0;
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WARN(!p_fs->dev_ejected,
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"[EXFAT] No bh, device seems wrong or to be ejected.\n");
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return -EIO;
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}
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int exfat_bdev_write(struct super_block *sb, sector_t secno, struct buffer_head *bh,
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u32 num_secs, bool sync)
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{
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s32 count;
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struct buffer_head *bh2;
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struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
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struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
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#ifdef CONFIG_STAGING_EXFAT_KERNEL_DEBUG
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struct exfat_sb_info *sbi = EXFAT_SB(sb);
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long flags = sbi->debug_flags;
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if (flags & EXFAT_DEBUGFLAGS_ERROR_RW)
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return -EIO;
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#endif /* CONFIG_STAGING_EXFAT_KERNEL_DEBUG */
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if (!p_bd->opened)
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return -ENODEV;
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if (secno == bh->b_blocknr) {
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lock_buffer(bh);
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set_buffer_uptodate(bh);
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mark_buffer_dirty(bh);
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unlock_buffer(bh);
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if (sync && (sync_dirty_buffer(bh) != 0))
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return -EIO;
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} else {
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count = num_secs << p_bd->sector_size_bits;
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bh2 = __getblk(sb->s_bdev, secno, count);
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if (!bh2)
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goto no_bh;
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lock_buffer(bh2);
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memcpy(bh2->b_data, bh->b_data, count);
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set_buffer_uptodate(bh2);
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mark_buffer_dirty(bh2);
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unlock_buffer(bh2);
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if (sync && (sync_dirty_buffer(bh2) != 0)) {
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__brelse(bh2);
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goto no_bh;
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}
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__brelse(bh2);
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}
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return 0;
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no_bh:
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WARN(!p_fs->dev_ejected,
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"[EXFAT] No bh, device seems wrong or to be ejected.\n");
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return -EIO;
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}
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int exfat_bdev_sync(struct super_block *sb)
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{
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struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
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#ifdef CONFIG_STAGING_EXFAT_KERNEL_DEBUG
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struct exfat_sb_info *sbi = EXFAT_SB(sb);
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long flags = sbi->debug_flags;
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if (flags & EXFAT_DEBUGFLAGS_ERROR_RW)
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return -EIO;
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#endif /* CONFIG_STAGING_EXFAT_KERNEL_DEBUG */
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if (!p_bd->opened)
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return -ENODEV;
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return sync_blockdev(sb->s_bdev);
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}
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