> -----Original Message----- > From: K. Y. Srinivasan [mailto:kys@xxxxxxxxxxxxx] > Sent: Tuesday, October 02, 2012 2:04 PM > To: gregkh@xxxxxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; > devel@xxxxxxxxxxxxxxxxxxxxxx; ohering@xxxxxxxx; jbottomley@xxxxxxxxxxxxx; > hch@xxxxxxxxxxxxx; linux-scsi@xxxxxxxxxxxxxxx > Cc: KY Srinivasan; stable@xxxxxxxxxxxxxxx > Subject: [PATCH 1/1] Drivers: 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@xxxxxxxxxxxxx> > Cc: stable@xxxxxxxxxxxxxxx > --- > drivers/scsi/storvsc_drv.c | 5 +++++ > 1 files changed, 5 insertions(+), 0 deletions(-) > > diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c > index 528d52b..0144078 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) > /* > * At this point, all outstanding requests in the adapter > * should have been flushed out and return to us > + * There is a potential race here where the host may be in > + * the process of responding when we return from here. > + * Just wait for all in-transit packets to be accounted for > + * before we return from here. > */ > + storvsc_wait_to_drain(stor_device); > > return SUCCESS; > } > -- > 1.7.4.1 James, This patch is critical for running Linux based workloads on our Cloud infrastructure - Azure. Please let me know if there are any issues. Regards, K. Y _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
