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[SCSI] sd: use REQ_PM in sd's runtime suspend operation 

With the introduction of REQ_PM, modify sd's runtime suspend operation
functions to use that flag so that the operations to put the device into
runtime suspended state(i.e. sync cache and stop device) will not affect
its runtime PM status.

Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Lin Ming 2013-03-23 11:42:25 +08:00 committed by James Bottomley
parent b8d4a5bf6a
commit 9b21493c45
3 changed files with 21 additions and 13 deletions
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9
drivers/scsi/scsi_lib.c
View File

@ -276,11 +276,10 @@ int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
}
EXPORT_SYMBOL(scsi_execute);
int scsi_execute_req(struct scsi_device *sdev, const unsigned char *cmd,
int scsi_execute_req_flags(struct scsi_device *sdev, const unsigned char *cmd,
int data_direction, void *buffer, unsigned bufflen,
struct scsi_sense_hdr *sshdr, int timeout, int retries,
int *resid)
int *resid, int flags)
{
char *sense = NULL;
int result;
@ -291,14 +290,14 @@ int scsi_execute_req(struct scsi_device *sdev, const unsigned char *cmd,
return DRIVER_ERROR << 24;
}
result = scsi_execute(sdev, cmd, data_direction, buffer, bufflen,
sense, timeout, retries, 0, resid);
sense, timeout, retries, flags, resid);
if (sshdr)
scsi_normalize_sense(sense, SCSI_SENSE_BUFFERSIZE, sshdr);
kfree(sense);
return result;
}
EXPORT_SYMBOL(scsi_execute_req);
EXPORT_SYMBOL(scsi_execute_req_flags);
/*
* Function: scsi_init_cmd_errh()

9
drivers/scsi/sd.c
View File

@ -1424,8 +1424,9 @@ static int sd_sync_cache(struct scsi_disk *sdkp)
* Leave the rest of the command zero to indicate
* flush everything.
*/
res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr,
SD_FLUSH_TIMEOUT, SD_MAX_RETRIES, NULL);
res = scsi_execute_req_flags(sdp, cmd, DMA_NONE, NULL, 0,
&sshdr, SD_FLUSH_TIMEOUT,
SD_MAX_RETRIES, NULL, REQ_PM);
if (res == 0)
break;
}
@ -3021,8 +3022,8 @@ static int sd_start_stop_device(struct scsi_disk *sdkp, int start)
if (!scsi_device_online(sdp))
return -ENODEV;
res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr,
SD_TIMEOUT, SD_MAX_RETRIES, NULL);
res = scsi_execute_req_flags(sdp, cmd, DMA_NONE, NULL, 0, &sshdr,
SD_TIMEOUT, SD_MAX_RETRIES, NULL, REQ_PM);
if (res) {
sd_printk(KERN_WARNING, sdkp, "START_STOP FAILED\n");
sd_print_result(sdkp, res);

16
include/scsi/scsi_device.h
View File

@ -394,10 +394,18 @@ extern 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,
int flag, int *resid);
extern int scsi_execute_req(struct scsi_device *sdev, const unsigned char *cmd,
int data_direction, void *buffer, unsigned bufflen,
struct scsi_sense_hdr *, int timeout, int retries,
int *resid);
extern int scsi_execute_req_flags(struct scsi_device *sdev,
const unsigned char *cmd, int data_direction, void *buffer,
unsigned bufflen, struct scsi_sense_hdr *sshdr, int timeout,
int retries, int *resid, int flags);
static inline int scsi_execute_req(struct scsi_device *sdev,
const unsigned char *cmd, int data_direction, void *buffer,
unsigned bufflen, struct scsi_sense_hdr *sshdr, int timeout,
int retries, int *resid)
{
return scsi_execute_req_flags(sdev, cmd, data_direction, buffer,
bufflen, sshdr, timeout, retries, resid, 0);
}
extern void sdev_disable_disk_events(struct scsi_device *sdev);
extern void sdev_enable_disk_events(struct scsi_device *sdev);