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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>
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2 changed files with 4 additions and 0 deletions
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@ -58,7 +58,9 @@ static int smp_execute_task_sg(struct domain_device *dev,
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struct sas_task *task = NULL;
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struct sas_internal *i =
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to_sas_internal(dev->port->ha->core.shost->transportt);
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struct sas_ha_struct *ha = dev->port->ha;
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pm_runtime_get_sync(ha->dev);
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mutex_lock(&dev->ex_dev.cmd_mutex);
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for (retry = 0; retry < 3; retry++) {
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if (test_bit(SAS_DEV_GONE, &dev->state)) {
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@ -131,6 +133,7 @@ static int smp_execute_task_sg(struct domain_device *dev,
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}
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}
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mutex_unlock(&dev->ex_dev.cmd_mutex);
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pm_runtime_put_sync(ha->dev);
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BUG_ON(retry == 3 && task != NULL);
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sas_free_task(task);
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@ -14,6 +14,7 @@
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#include <scsi/scsi_transport_sas.h>
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#include <scsi/libsas.h>
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#include <scsi/sas_ata.h>
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#include <linux/pm_runtime.h>
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#ifdef pr_fmt
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#undef pr_fmt
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