SCSI: fix crashes in sd and sr runtime PM

[linux-2.6-block.git] / drivers / scsi / sd.c

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 4e08d1cd704d1c261c82a98067649154f433ecd1..84fa4c46eaa6fc692490a5acc0b81e8938bfd5f6 100644 (file)
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -3268,8 +3268,8 @@ static int sd_suspend_common(struct device *dev, bool ignore_stop_errors)
        struct scsi_disk *sdkp = dev_get_drvdata(dev);
        int ret = 0;
 
-       if (!sdkp)
-               return 0;       /* this can happen */
+       if (!sdkp)      /* E.g.: runtime suspend following sd_remove() */
+               return 0;
 
        if (sdkp->WCE && sdkp->media_present) {
                sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n");
@@ -3308,6 +3308,9 @@ static int sd_resume(struct device *dev)
 {
        struct scsi_disk *sdkp = dev_get_drvdata(dev);
 
+       if (!sdkp)      /* E.g.: runtime resume at the start of sd_probe() */
+               return 0;
+
        if (!sdkp->device->manage_start_stop)
                return 0;