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authorXiang Chen <chenxiang66@hisilicon.com>2021-12-20 14:21:32 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2021-12-23 07:38:30 +0300
commit0da7ca4c4fd95d70d473dc07488ad94ba3ee9b82 (patch)
treedc5c4934f10cadb7378de2be29267582001448d0 /drivers/scsi
parent97f4100939844a6381ba61b99d6d2b1f2fccb79f (diff)
downloadlinux-0da7ca4c4fd95d70d473dc07488ad94ba3ee9b82.tar.xz
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>
Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/libsas/sas_expander.c3
-rw-r--r--drivers/scsi/libsas/sas_internal.h1
2 files changed, 4 insertions, 0 deletions
diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c
index c2150a818423..6abce9dfc17b 100644
--- a/drivers/scsi/libsas/sas_expander.c
+++ b/drivers/scsi/libsas/sas_expander.c
@@ -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);
diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h
index d7a1fb5c10c6..ad9764a976c3 100644
--- a/drivers/scsi/libsas/sas_internal.h
+++ b/drivers/scsi/libsas/sas_internal.h
@@ -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