Commit e5fbe232 authored by Long Li's avatar Long Li Committed by Greg Kroah-Hartman

scsi: storvsc: properly set residual data length on errors

commit 40630f46 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: default avatarShiva Krishna <Shiva.Krishna@nimblestorage.com>
Signed-off-by: default avatarLong Li <longli@microsoft.com>
Reviewed-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 0aeb0495
...@@ -377,6 +377,7 @@ enum storvsc_request_type { ...@@ -377,6 +377,7 @@ enum storvsc_request_type {
#define SRB_STATUS_SUCCESS 0x01 #define SRB_STATUS_SUCCESS 0x01
#define SRB_STATUS_ABORTED 0x02 #define SRB_STATUS_ABORTED 0x02
#define SRB_STATUS_ERROR 0x04 #define SRB_STATUS_ERROR 0x04
#define SRB_STATUS_DATA_OVERRUN 0x12
#define SRB_STATUS(status) \ #define SRB_STATUS(status) \
(status & ~(SRB_STATUS_AUTOSENSE_VALID | SRB_STATUS_QUEUE_FROZEN)) (status & ~(SRB_STATUS_AUTOSENSE_VALID | SRB_STATUS_QUEUE_FROZEN))
...@@ -962,6 +963,7 @@ static void storvsc_command_completion(struct storvsc_cmd_request *cmd_request, ...@@ -962,6 +963,7 @@ static void storvsc_command_completion(struct storvsc_cmd_request *cmd_request,
struct scsi_cmnd *scmnd = cmd_request->cmd; struct scsi_cmnd *scmnd = cmd_request->cmd;
struct scsi_sense_hdr sense_hdr; struct scsi_sense_hdr sense_hdr;
struct vmscsi_request *vm_srb; struct vmscsi_request *vm_srb;
u32 data_transfer_length;
struct Scsi_Host *host; struct Scsi_Host *host;
u32 payload_sz = cmd_request->payload_sz; u32 payload_sz = cmd_request->payload_sz;
void *payload = cmd_request->payload; void *payload = cmd_request->payload;
...@@ -969,6 +971,7 @@ static void storvsc_command_completion(struct storvsc_cmd_request *cmd_request, ...@@ -969,6 +971,7 @@ static void storvsc_command_completion(struct storvsc_cmd_request *cmd_request,
host = stor_dev->host; host = stor_dev->host;
vm_srb = &cmd_request->vstor_packet.vm_srb; vm_srb = &cmd_request->vstor_packet.vm_srb;
data_transfer_length = vm_srb->data_transfer_length;
scmnd->result = vm_srb->scsi_status; scmnd->result = vm_srb->scsi_status;
...@@ -982,13 +985,20 @@ static void storvsc_command_completion(struct storvsc_cmd_request *cmd_request, ...@@ -982,13 +985,20 @@ static void storvsc_command_completion(struct storvsc_cmd_request *cmd_request,
&sense_hdr); &sense_hdr);
} }
if (vm_srb->srb_status != SRB_STATUS_SUCCESS) if (vm_srb->srb_status != SRB_STATUS_SUCCESS) {
storvsc_handle_error(vm_srb, scmnd, host, sense_hdr.asc, storvsc_handle_error(vm_srb, scmnd, host, sense_hdr.asc,
sense_hdr.ascq); sense_hdr.ascq);
/*
* The Windows driver set data_transfer_length on
* SRB_STATUS_DATA_OVERRUN. On other errors, this value
* is untouched. In these cases we set it to 0.
*/
if (vm_srb->srb_status != SRB_STATUS_DATA_OVERRUN)
data_transfer_length = 0;
}
scsi_set_resid(scmnd, scsi_set_resid(scmnd,
cmd_request->payload->range.len - cmd_request->payload->range.len - data_transfer_length);
vm_srb->data_transfer_length);
scmnd->scsi_done(scmnd); scmnd->scsi_done(scmnd);
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment