scsi: storvsc: properly set residual data length on errors
authorLong Li <longli@microsoft.com>
Thu, 15 Dec 2016 02:46:03 +0000 (18:46 -0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sun, 12 Mar 2017 05:41:45 +0000 (06:41 +0100)
commita50781fe6edabe33ecdef862fd9e7f2f35277de6
tree5ceaccca2c832b4a0df16fa21d592a1d67a85fc1
parente59693753e08c70a4da76e951ba4279003c1228e
scsi: storvsc: properly set residual data length on errors

commit 40630f462824ee24bc00d692865c86c3828094e0 upstream.

On I/O errors, the Windows driver doesn't set data_transfer_length
on error conditions other than SRB_STATUS_DATA_OVERRUN.
In these cases we need to set data_transfer_length to 0,
indicating there is no data transferred. On SRB_STATUS_DATA_OVERRUN,
data_transfer_length is set by the Windows driver to the actual data transferred.

Reported-by: Shiva Krishna <Shiva.Krishna@nimblestorage.com>
Signed-off-by: Long Li <longli@microsoft.com>
Reviewed-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/scsi/storvsc_drv.c