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block: cleanup rq->data_len usages

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With recent unification of fields, it's now guaranteed that
rq->data_len always equals blk_rq_bytes().  Convert all non-IDE direct
users to accessors.  IDE will be converted in a separate patch.

Boaz: spotted incorrect data_len/resid_len conversion in osd.

[ Impact: convert direct rq->data_len usages to blk_rq_bytes() ]

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Pete Zaitcev <zaitcev@redhat.com>
Cc: Eric Moore <Eric.Moore@lsi.com>
Cc: Markus Lidel <Markus.Lidel@shadowconnect.com>
Cc: Darrick J. Wong <djwong@us.ibm.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Eric Moore <Eric.Moore@lsi.com>
Cc: Boaz Harrosh <bharrosh@panasas.com>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Tejun Heo
2009-05-07 22:24:42 +09:00
committed by Jens Axboe
parent 2e46e8b27a
commit b079041030
10 changed files with 49 additions and 49 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
drivers/scsi/libsas/sas_host_smp.c
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@@ -137,21 +137,21 @@ int sas_smp_host_handler(struct Scsi_Host *shost, struct request *req,
int error = -EINVAL;
/* eight is the minimum size for request and response frames */
if (req->data_len < 8 || rsp->data_len < 8)
if (blk_rq_bytes(req) < 8 || blk_rq_bytes(rsp) < 8)
goto out;
if (bio_offset(req->bio) + req->data_len > PAGE_SIZE ||
bio_offset(rsp->bio) + rsp->data_len > PAGE_SIZE) {
if (bio_offset(req->bio) + blk_rq_bytes(req) > PAGE_SIZE ||
bio_offset(rsp->bio) + blk_rq_bytes(rsp) > PAGE_SIZE) {
shost_printk(KERN_ERR, shost,
"SMP request/response frame crosses page boundary");
goto out;
}
req_data = kzalloc(req->data_len, GFP_KERNEL);
req_data = kzalloc(blk_rq_bytes(req), GFP_KERNEL);
/* make sure frame can always be built ... we copy
* back only the requested length */
resp_data = kzalloc(max(rsp->data_len, 128U), GFP_KERNEL);
resp_data = kzalloc(max(blk_rq_bytes(rsp), 128U), GFP_KERNEL);
if (!req_data || !resp_data) {
error = -ENOMEM;
@@ -160,7 +160,7 @@ int sas_smp_host_handler(struct Scsi_Host *shost, struct request *req,
local_irq_disable();
buf = kmap_atomic(bio_page(req->bio), KM_USER0) + bio_offset(req->bio);
memcpy(req_data, buf, req->data_len);
memcpy(req_data, buf, blk_rq_bytes(req));
kunmap_atomic(buf - bio_offset(req->bio), KM_USER0);
local_irq_enable();
@@ -176,8 +176,8 @@ int sas_smp_host_handler(struct Scsi_Host *shost, struct request *req,
resp_data[1] = req_data[1];
resp_data[2] = SMP_RESP_FUNC_UNK;
req->resid_len = req->data_len;
rsp->resid_len = rsp->data_len;
req->resid_len = blk_rq_bytes(req);
rsp->resid_len = blk_rq_bytes(rsp);
switch (req_data[1]) {
case SMP_REPORT_GENERAL:
@@ -264,7 +264,7 @@ int sas_smp_host_handler(struct Scsi_Host *shost, struct request *req,
local_irq_disable();
buf = kmap_atomic(bio_page(rsp->bio), KM_USER0) + bio_offset(rsp->bio);
memcpy(buf, resp_data, rsp->data_len);
memcpy(buf, resp_data, blk_rq_bytes(rsp));
flush_kernel_dcache_page(bio_page(rsp->bio));
kunmap_atomic(buf - bio_offset(rsp->bio), KM_USER0);
local_irq_enable();