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scsi: qla1280: Move the SCSI pointer to private command data 

Set .cmd_size in the SCSI host template instead of using the SCSI pointer
from struct scsi_cmnd. This patch prepares for removal of the SCSI pointer
from struct scsi_cmnd.

Link: https://lore.kernel.org/r/20220218195117.25689-42-bvanassche@acm.org
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Bart Van Assche 2022-02-18 11:51:09 -08:00 committed by Martin K. Petersen
parent 4a938517fb
commit 504540d00f
2 changed files with 5 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
drivers/scsi/qla1280.c
View File

@ -477,13 +477,6 @@ __setup("qla1280=", qla1280_setup);
#endif
/*
* We use the scsi_pointer structure that's included with each scsi_command
* to overlay our struct srb over it. qla1280_init() checks that a srb is not
* bigger than a scsi_pointer.
*/
#define CMD_SP(Cmnd) &Cmnd->SCp
#define CMD_CDBLEN(Cmnd) Cmnd->cmd_len
#define CMD_CDBP(Cmnd) Cmnd->cmnd
#define CMD_SNSP(Cmnd) Cmnd->sense_buffer
@ -693,7 +686,7 @@ static int qla1280_queuecommand_lck(struct scsi_cmnd *cmd)
{
struct Scsi_Host *host = cmd->device->host;
struct scsi_qla_host *ha = (struct scsi_qla_host *)host->hostdata;
struct srb *sp = (struct srb *)CMD_SP(cmd);
struct srb *sp = scsi_cmd_priv(cmd);
int status;
sp->cmd = cmd;
@ -828,7 +821,7 @@ qla1280_error_action(struct scsi_cmnd *cmd, enum action action)
ENTER("qla1280_error_action");
ha = (struct scsi_qla_host *)(CMD_HOST(cmd)->hostdata);
sp = (struct srb *)CMD_SP(cmd);
sp = scsi_cmd_priv(cmd);
bus = SCSI_BUS_32(cmd);
target = SCSI_TCN_32(cmd);
lun = SCSI_LUN_32(cmd);
@ -3959,7 +3952,7 @@ __qla1280_print_scsi_cmd(struct scsi_cmnd *cmd)
int i;
ha = (struct scsi_qla_host *)host->hostdata;
sp = (struct srb *)CMD_SP(cmd);
sp = scsi_cmd_priv(cmd);
printk("SCSI Command @= 0x%p, Handle=0x%p\n", cmd, CMD_HANDLE(cmd));
printk(" chan=%d, target = 0x%02x, lun = 0x%02x, cmd_len = 0x%02x\n",
SCSI_BUS_32(cmd), SCSI_TCN_32(cmd), SCSI_LUN_32(cmd),
@ -3979,7 +3972,6 @@ __qla1280_print_scsi_cmd(struct scsi_cmnd *cmd)
} */
printk(" tag=%d, transfersize=0x%x \n",
scsi_cmd_to_rq(cmd)->tag, cmd->transfersize);
printk(" SP=0x%p\n", CMD_SP(cmd));
printk(" underflow size = 0x%x, direction=0x%x\n",
cmd->underflow, cmd->sc_data_direction);
}
@ -4139,6 +4131,7 @@ static struct scsi_host_template qla1280_driver_template = {
.can_queue = MAX_OUTSTANDING_COMMANDS,
.this_id = -1,
.sg_tablesize = SG_ALL,
.cmd_size = sizeof(struct srb),
};
@ -4351,12 +4344,6 @@ static struct pci_driver qla1280_pci_driver = {
static int __init
qla1280_init(void)
{
if (sizeof(struct srb) > sizeof(struct scsi_pointer)) {
printk(KERN_WARNING
"qla1280: struct srb too big, aborting\n");
return -EINVAL;
}
#ifdef MODULE
/*
* If we are called as a module, the qla1280 pointer may not be null

3
drivers/scsi/qla1280.h
View File

@ -87,8 +87,7 @@
#define RESPONSE_ENTRY_CNT 63 /* Number of response entries. */
/*
* SCSI Request Block structure (sp) that is placed
* on cmd->SCp location of every I/O
* SCSI Request Block structure (sp) that occurs after each struct scsi_cmnd.
*/
struct srb {
struct list_head list; /* (8/16) LU queue */