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scsi: libsas: Resume host while sending SMP I/Os 

When sending SMP I/Os to the host we need to ensure that the host is not
suspended and can process the commands. This is a better approach than
replying on the host to resume itself to handle such commands. Use
pm_runtime_get_sync() and pm_runtime_put_sync() calls for the host when
executing SMP I/Os.

Link: https://lore.kernel.org/r/1639999298-244569-10-git-send-email-chenxiang66@hisilicon.com
Reviewed-by: John Garry <john.garry@huawei.com>
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Xiang Chen 2021-12-20 19:21:32 +08:00 committed by Martin K. Petersen
parent 97f4100939
commit 0da7ca4c4f
2 changed files with 4 additions and 0 deletions
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3
drivers/scsi/libsas/sas_expander.c
View File

@ -58,7 +58,9 @@ static int smp_execute_task_sg(struct domain_device *dev,
struct sas_task *task = NULL;
struct sas_internal *i =
to_sas_internal(dev->port->ha->core.shost->transportt);
struct sas_ha_struct *ha = dev->port->ha;
pm_runtime_get_sync(ha->dev);
mutex_lock(&dev->ex_dev.cmd_mutex);
for (retry = 0; retry < 3; retry++) {
if (test_bit(SAS_DEV_GONE, &dev->state)) {
@ -131,6 +133,7 @@ static int smp_execute_task_sg(struct domain_device *dev,
}
}
mutex_unlock(&dev->ex_dev.cmd_mutex);
pm_runtime_put_sync(ha->dev);
BUG_ON(retry == 3 && task != NULL);
sas_free_task(task);

1
drivers/scsi/libsas/sas_internal.h
View File

@ -14,6 +14,7 @@
#include <scsi/scsi_transport_sas.h>
#include <scsi/libsas.h>
#include <scsi/sas_ata.h>
#include <linux/pm_runtime.h>
#ifdef pr_fmt
#undef pr_fmt