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authorK. Y. Srinivasan <kys@microsoft.com>2012-10-02 14:03:31 -0400
committerJames Bottomley <JBottomley@Parallels.com>2012-10-09 07:28:58 -0400
commit5c1b10ab7f93d24f29b5630286e323d1c5802d5c (patch)
tree2a16bba3a1d7d25d6e7a0cfdf4aa24d865efaeca /drivers/scsi
parentf24b5cb818c6789e5d42d4881f34238a5fa0b40c (diff)
[SCSI] storvsc: Account for in-transit packets in the RESET path
Properly account for I/O in transit before returning from the RESET call. In the absense of this patch, we could have a situation where the host may respond to a command that was issued prior to the issuance of the RESET command at some arbitrary time after responding to the RESET command. Currently, the host does not do anything with the RESET command. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Cc: stable@vger.kernel.org Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/storvsc_drv.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
index 528d52beaa1c..01440782feb2 100644
--- a/drivers/scsi/storvsc_drv.c
+++ b/drivers/scsi/storvsc_drv.c
@@ -1221,7 +1221,12 @@ static int storvsc_host_reset_handler(struct scsi_cmnd *scmnd)
1221 /* 1221 /*
1222 * At this point, all outstanding requests in the adapter 1222 * At this point, all outstanding requests in the adapter
1223 * should have been flushed out and return to us 1223 * should have been flushed out and return to us
1224 * There is a potential race here where the host may be in
1225 * the process of responding when we return from here.
1226 * Just wait for all in-transit packets to be accounted for
1227 * before we return from here.
1224 */ 1228 */
1229 storvsc_wait_to_drain(stor_device);
1225 1230
1226 return SUCCESS; 1231 return SUCCESS;
1227} 1232}