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scsi: simplify scsi_execute_req_flags 

Add a sshdr argument to __scsi_execute so that we can decode the sense
data directly into the sense header instead of needing a copy of it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Christoph Hellwig 2017-02-14 20:15:58 +01:00 committed by Martin K. Petersen
parent 74a78ebda4
commit 3949e2f042
1 changed files with 9 additions and 18 deletions
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27
drivers/scsi/scsi_lib.c
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@ -215,8 +215,9 @@ void scsi_queue_insert(struct scsi_cmnd *cmd, int reason)
static int __scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
int data_direction, void *buffer, unsigned bufflen,
unsigned char *sense, int timeout, int retries, u64 flags,
req_flags_t rq_flags, int *resid)
unsigned char *sense, struct scsi_sense_hdr *sshdr,
int timeout, int retries, u64 flags, req_flags_t rq_flags,
int *resid)
{
struct request *req;
struct scsi_request *rq;
@ -259,6 +260,8 @@ static int __scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
*resid = rq->resid_len;
if (sense && rq->sense_len)
memcpy(sense, rq->sense, SCSI_SENSE_BUFFERSIZE);
if (sshdr)
scsi_normalize_sense(rq->sense, rq->sense_len, sshdr);
ret = req->errors;
out:
blk_put_request(req);
@ -288,7 +291,7 @@ int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
int *resid)
{
return __scsi_execute(sdev, cmd, data_direction, buffer, bufflen, sense,
timeout, retries, flags, 0, resid);
NULL, timeout, retries, flags, 0, resid);
}
EXPORT_SYMBOL(scsi_execute);
@ -297,21 +300,9 @@ int scsi_execute_req_flags(struct scsi_device *sdev, const unsigned char *cmd,
struct scsi_sense_hdr *sshdr, int timeout, int retries,
int *resid, u64 flags, req_flags_t rq_flags)
{
char *sense = NULL;
int result;
if (sshdr) {
sense = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
if (!sense)
return DRIVER_ERROR << 24;
}
result = __scsi_execute(sdev, cmd, data_direction, buffer, bufflen,
sense, timeout, retries, flags, rq_flags, resid);
if (sshdr)
scsi_normalize_sense(sense, SCSI_SENSE_BUFFERSIZE, sshdr);
kfree(sense);
return result;
return __scsi_execute(sdev, cmd, data_direction, buffer, bufflen,
NULL, sshdr, timeout, retries, flags, rq_flags,
resid);
}
EXPORT_SYMBOL(scsi_execute_req_flags);