Hello.
Tejun Heo wrote:
Index: block/drivers/message/fusion/mptsas.c
===================================================================
--- block.orig/drivers/message/fusion/mptsas.c
+++ block/drivers/message/fusion/mptsas.c
@@ -1357,7 +1357,8 @@ static int mptsas_smp_handler(struct Scs
smprep = (SmpPassthroughReply_t *)ioc->sas_mgmt.reply;
memcpy(req->sense, smprep, sizeof(*smprep));
req->sense_len = sizeof(*smprep);
- rsp->resid_len = blk_rq_bytes(rsp) - smprep->ResponseDataLength;
+ req->resid_len = 0;
+ rsp->resid_len -= smprep->ResponseDataLength;
Is negative resid_len intended here? If so, shouldn't it be simply:
rsp->resid_len = -smprep->ResponseDataLength;
From patch description.
This patchset restores the original behavior by setting rq->resid_len
to blk_rq_bytes(rq) on issue and restoring explicit clearing in
affected drivers.
So, rsp->resid_len equals the initial request length before the
subtraction and after subtraction it becomes the residue count. The
original code was
req->data_len = 0;
rsp->data_len -= smprep->ResponseDataLength;
Ah, I've confused up 'rsp' and 'req' as being one thing. Nevermind
then. :-<
Index: block/drivers/scsi/libsas/sas_expander.c
===================================================================
--- block.orig/drivers/scsi/libsas/sas_expander.c
+++ block/drivers/scsi/libsas/sas_expander.c
@@ -1937,7 +1937,11 @@ int sas_smp_handler(struct Scsi_Host *sh
if (ret > 0) {
/* positive number is the untransferred residual */
rsp->resid_len = ret;
+ req->resid_len = 0;
ret = 0;
+ } else if (ret == 0) {
+ rsp->resid_len = 0;
+ req->resid_len = 0;
Heh... there's a reason I mentioned the original commit. The original
code was
if (ret > 0) {
/* positive number is the untransferred residual */
rsp->data_len = ret;
req->data_len = 0;
ret = 0;
} else if (ret == 0) {
rsp->data_len = 0;
req->data_len = 0;
}
But still,
req->data_len = 0;
is common between both branches, so could be moved after the *if* statement.
Index: block/drivers/scsi/libsas/sas_host_smp.c
===================================================================
--- block.orig/drivers/scsi/libsas/sas_host_smp.c
+++ block/drivers/scsi/libsas/sas_host_smp.c
@@ -176,9 +176,6 @@ int sas_smp_host_handler(struct Scsi_Hos
resp_data[1] = req_data[1];
resp_data[2] = SMP_RESP_FUNC_UNK;
- req->resid_len = blk_rq_bytes(req);
- rsp->resid_len = blk_rq_bytes(rsp);
-
Cuz it's already set to blk_rq_bytes().
Mixed them up again... :-<
switch (req_data[1]) {
case SMP_REPORT_GENERAL:
req->resid_len -= 8;
Index: block/drivers/scsi/mpt2sas/mpt2sas_transport.c
===================================================================
--- block.orig/drivers/scsi/mpt2sas/mpt2sas_transport.c
+++ block/drivers/scsi/mpt2sas/mpt2sas_transport.c
@@ -1170,8 +1170,8 @@ transport_smp_handler(struct Scsi_Host *
memcpy(req->sense, mpi_reply, sizeof(*mpi_reply));
req->sense_len = sizeof(*mpi_reply);
- rsp->resid_len = blk_rq_bytes(rsp) -
- mpi_reply->ResponseDataLength;
+ req->resid_len = 0;
+ rsp->resid_len -= mpi_reply->ResponseDataLength;
Again, is negative resid_len intended?
Ditto.
... and again.
Thanks.
WBR, Sergei
--
To unsubscribe from this list: send the line "unsubscribe linux-ide" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
