block: Remove some unnecessary bi_vcnt usage

More prep work for immutable bvecs/effecient bio splitting - usage of
bi_vcnt has to be auditing, so getting rid of all the unnecessary usage
makes that easier.

Plus, bio_segments() is really what this code wanted, as it respects the
current value of bi_idx.

Signed-off-by: Kent Overstreet <koverstreet@google.com>
CC: Jens Axboe <axboe@kernel.dk>
CC: Eric Moore <Eric.Moore@lsi.com>
CC: "James E.J. Bottomley" <JBottomley@parallels.com>
CC: linux-scsi@vger.kernel.org

diff --git a/drivers/message/fusion/mptsas.c b/drivers/message/fusion/mptsas.c
index fa43c39..2bb0154 100644 (file)
--- a/drivers/message/fusion/mptsas.c
+++ b/drivers/message/fusion/mptsas.c
@@ -2235,10 +2235,10 @@ static int mptsas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
        }
 
        /* do we need to support multiple segments? */
-       if (req->bio->bi_vcnt > 1 || rsp->bio->bi_vcnt > 1) {
+       if (bio_segments(req->bio) > 1 || bio_segments(rsp->bio) > 1) {
                printk(MYIOC_s_ERR_FMT "%s: multiple segments req %u %u, rsp %u %u\n",
-                   ioc->name, __func__, req->bio->bi_vcnt, blk_rq_bytes(req),
-                   rsp->bio->bi_vcnt, blk_rq_bytes(rsp));
+                   ioc->name, __func__, bio_segments(req->bio), blk_rq_bytes(req),
+                   bio_segments(rsp->bio), blk_rq_bytes(rsp));
                return -EINVAL;
        }
 

diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c
index aec2e0d..7af7767 100644 (file)
--- a/drivers/scsi/libsas/sas_expander.c
+++ b/drivers/scsi/libsas/sas_expander.c
@@ -2151,10 +2151,10 @@ int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
        }
 
        /* do we need to support multiple segments? */
-       if (req->bio->bi_vcnt > 1 || rsp->bio->bi_vcnt > 1) {
+       if (bio_segments(req->bio) > 1 || bio_segments(rsp->bio) > 1) {
                printk("%s: multiple segments req %u %u, rsp %u %u\n",
-                      __func__, req->bio->bi_vcnt, blk_rq_bytes(req),
-                      rsp->bio->bi_vcnt, blk_rq_bytes(rsp));
+                      __func__, bio_segments(req->bio), blk_rq_bytes(req),
+                      bio_segments(rsp->bio), blk_rq_bytes(rsp));
                return -EINVAL;
        }
 

diff --git a/drivers/scsi/mpt2sas/mpt2sas_transport.c b/drivers/scsi/mpt2sas/mpt2sas_transport.c
index 8c2ffbe..193e7ae 100644 (file)
--- a/drivers/scsi/mpt2sas/mpt2sas_transport.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_transport.c
@@ -1939,7 +1939,7 @@ _transport_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
        ioc->transport_cmds.status = MPT2_CMD_PENDING;
 
        /* Check if the request is split across multiple segments */
-       if (req->bio->bi_vcnt > 1) {
+       if (bio_segments(req->bio) > 1) {
                u32 offset = 0;
 
                /* Allocate memory and copy the request */
@@ -1971,7 +1971,7 @@ _transport_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
 
        /* Check if the response needs to be populated across
         * multiple segments */
-       if (rsp->bio->bi_vcnt > 1) {
+       if (bio_segments(rsp->bio) > 1) {
                pci_addr_in = pci_alloc_consistent(ioc->pdev, blk_rq_bytes(rsp),
                    &pci_dma_in);
                if (!pci_addr_in) {
@@ -2038,7 +2038,7 @@ _transport_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
        sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
            MPI2_SGE_FLAGS_END_OF_BUFFER | MPI2_SGE_FLAGS_HOST_TO_IOC);
        sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
-       if (req->bio->bi_vcnt > 1) {
+       if (bio_segments(req->bio) > 1) {
                ioc->base_add_sg_single(psge, sgl_flags |
                    (blk_rq_bytes(req) - 4), pci_dma_out);
        } else {
@@ -2054,7 +2054,7 @@ _transport_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
            MPI2_SGE_FLAGS_LAST_ELEMENT | MPI2_SGE_FLAGS_END_OF_BUFFER |
            MPI2_SGE_FLAGS_END_OF_LIST);
        sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
-       if (rsp->bio->bi_vcnt > 1) {
+       if (bio_segments(rsp->bio) > 1) {
                ioc->base_add_sg_single(psge, sgl_flags |
                    (blk_rq_bytes(rsp) + 4), pci_dma_in);
        } else {
@@ -2099,7 +2099,7 @@ _transport_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
                    le16_to_cpu(mpi_reply->ResponseDataLength);
                /* check if the resp needs to be copied from the allocated
                 * pci mem */
-               if (rsp->bio->bi_vcnt > 1) {
+               if (bio_segments(rsp->bio) > 1) {
                        u32 offset = 0;
                        u32 bytes_to_copy =
                            le16_to_cpu(mpi_reply->ResponseDataLength);