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[SCSI] sd: check runtime PM status in sd_shutdown
sd_shutdown is called during reboot/poweroff. It may fail if parent device, for example, ata port, was runtime suspended. Fix it by checking runtime PM status of sd. Exit immediately if sd was runtime suspended already. Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
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@ -50,6 +50,7 @@
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#include <linux/string_helpers.h>
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#include <linux/async.h>
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#include <linux/slab.h>
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#include <linux/pm_runtime.h>
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#include <asm/uaccess.h>
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#include <asm/unaligned.h>
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@ -2741,6 +2742,9 @@ static void sd_shutdown(struct device *dev)
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if (!sdkp)
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return; /* this can happen */
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if (pm_runtime_suspended(dev))
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goto exit;
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if (sdkp->WCE) {
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sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n");
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sd_sync_cache(sdkp);
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@ -2751,6 +2755,7 @@ static void sd_shutdown(struct device *dev)
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sd_start_stop_device(sdkp, 0);
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}
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exit:
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scsi_disk_put(sdkp);
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}
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