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| author | Kent Overstreet <kmo@daterainc.com> | 2013-09-25 03:26:05 +0400 |
|---|---|---|
| committer | Kent Overstreet <kmo@daterainc.com> | 2013-11-24 10:33:51 +0400 |
| commit | 458b76ed2f9517becb74dcc8eedd70d3068ea6e4 (patch) | |
| tree | b01b2150b197e0759b3ba59c0f9367d4477ebb8c /drivers/scsi/mpt3sas/mpt3sas_transport.c | |
| parent | d57a5f7c6605f15f3b5134837e68b448a7cea88e (diff) | |
| download | linux-458b76ed2f9517becb74dcc8eedd70d3068ea6e4.tar.xz | |
block: Kill bio_segments()/bi_vcnt usage
When we start sharing biovecs, keeping bi_vcnt accurate for splits is
going to be error prone - and unnecessary, if we refactor some code.
So bio_segments() has to go - but most of the existing users just needed
to know if the bio had multiple segments, which is easier - add a
bio_multiple_segments() for them.
(Two of the current uses of bio_segments() are going to go away in a
couple patches, but the current implementation of bio_segments() is
unsafe as soon as we start doing driver conversions for immutable
biovecs - so implement a dumb version for bisectability, it'll go away
in a couple patches)
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Neil Brown <neilb@suse.de>
Cc: Nagalakshmi Nandigama <Nagalakshmi.Nandigama@lsi.com>
Cc: Sreekanth Reddy <Sreekanth.Reddy@lsi.com>
Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
Diffstat (limited to 'drivers/scsi/mpt3sas/mpt3sas_transport.c')
| -rw-r--r-- | drivers/scsi/mpt3sas/mpt3sas_transport.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/scsi/mpt3sas/mpt3sas_transport.c b/drivers/scsi/mpt3sas/mpt3sas_transport.c index 196a67f2e95f..65170cb1a00f 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_transport.c +++ b/drivers/scsi/mpt3sas/mpt3sas_transport.c @@ -1926,7 +1926,7 @@ _transport_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy, ioc->transport_cmds.status = MPT3_CMD_PENDING; /* Check if the request is split across multiple segments */ - if (req->bio->bi_vcnt > 1) { + if (bio_multiple_segments(req->bio)) { u32 offset = 0; /* Allocate memory and copy the request */ @@ -1958,7 +1958,7 @@ _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_multiple_segments(rsp->bio)) { pci_addr_in = pci_alloc_consistent(ioc->pdev, blk_rq_bytes(rsp), &pci_dma_in); if (!pci_addr_in) { @@ -2019,7 +2019,7 @@ _transport_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy, mpi_request->RequestDataLength = cpu_to_le16(blk_rq_bytes(req) - 4); psge = &mpi_request->SGL; - if (req->bio->bi_vcnt > 1) + if (bio_multiple_segments(req->bio)) ioc->build_sg(ioc, psge, pci_dma_out, (blk_rq_bytes(req) - 4), pci_dma_in, (blk_rq_bytes(rsp) + 4)); else @@ -2064,7 +2064,7 @@ _transport_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy, /* check if the resp needs to be copied from the allocated * pci mem */ - if (rsp->bio->bi_vcnt > 1) { + if (bio_multiple_segments(rsp->bio)) { u32 offset = 0; u32 bytes_to_copy = le16_to_cpu(mpi_reply->ResponseDataLength); |