Seth/kernel_amazon_mt8127-common
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

sd: get disk reference in sd_check_events()

Browse Source 
commit eb72d0bb84eee5d0dc3044fd17b75e7101dabb57 upstream.

sd_check_events() is called asynchronously, and might race
with device removal. So always take a disk reference when
processing the event to avoid the device being removed while
the event is processed.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Jinpu Wang <jinpu.wang@profitbricks.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Willy Tarreau <w@1wt.eu>
This commit is contained in:
Hannes Reinecke
2016-04-26 08:06:58 +02:00
committed by Willy Tarreau
parent 20bfb0a079
commit 1ba4fc4b07
1 changed files with 7 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/scsi/sd.c
+7 -2
View File
@@ -1354,11 +1354,15 @@ static int media_not_present(struct scsi_disk *sdkp,
**/
static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing)
{
struct scsi_disk *sdkp = scsi_disk(disk);
struct scsi_device *sdp = sdkp->device;
struct scsi_disk *sdkp = scsi_disk_get(disk);
struct scsi_device *sdp;
struct scsi_sense_hdr *sshdr = NULL;
int retval;
if (!sdkp)
return 0;
sdp = sdkp->device;
SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n"));
/*
@@ -1415,6 +1419,7 @@ out:
kfree(sshdr);
retval = sdp->changed ? DISK_EVENT_MEDIA_CHANGE : 0;
sdp->changed = 0;
scsi_disk_put(sdkp);
return retval;
}