Date: Sat, 24 Apr 2021 00:43:31 GMT From: Alexander Motin <mav@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: dd01826ad3ad - stable/12 - mpt(4): Remove incorrect S/G segments limits. Message-ID: <202104240043.13O0hVWn092005@gitrepo.freebsd.org>
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The branch stable/12 has been updated by mav: URL: https://cgit.FreeBSD.org/src/commit/?id=dd01826ad3add7e5285f4f391c9f502906c78600 commit dd01826ad3add7e5285f4f391c9f502906c78600 Author: Alexander Motin <mav@FreeBSD.org> AuthorDate: 2021-04-17 14:41:35 +0000 Commit: Alexander Motin <mav@FreeBSD.org> CommitDate: 2021-04-24 00:43:29 +0000 mpt(4): Remove incorrect S/G segments limits. First, two of those four checks are unreachable. Second, I don't believe there should be ">=" instead of ">". Third, bus_dma(9) already returns the same EFBIG if ">". This fixes false I/O errors in worst S/G cases with maxphys >= 2MB. MFC after: 1 week (cherry picked from commit 0f29396e493bd87ffa6a63fcb602b12e79d21a1e) --- sys/dev/mpt/mpt_cam.c | 20 -------------------- 1 file changed, 20 deletions(-) diff --git a/sys/dev/mpt/mpt_cam.c b/sys/dev/mpt/mpt_cam.c index 4fbca1d9fe25..a861dafbd060 100644 --- a/sys/dev/mpt/mpt_cam.c +++ b/sys/dev/mpt/mpt_cam.c @@ -1293,10 +1293,6 @@ mpt_execute_req_a64(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error) hdrp = req->req_vbuf; mpt_off = req->req_vbuf; - if (error == 0 && ((uint32_t)nseg) >= mpt->max_seg_cnt) { - error = EFBIG; - } - if (error == 0) { switch (hdrp->Function) { case MPI_FUNCTION_SCSI_IO_REQUEST: @@ -1316,12 +1312,6 @@ mpt_execute_req_a64(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error) } } - if (error == 0 && ((uint32_t)nseg) >= mpt->max_seg_cnt) { - error = EFBIG; - mpt_prt(mpt, "segment count %d too large (max %u)\n", - nseg, mpt->max_seg_cnt); - } - bad: if (error != 0) { if (error != EFBIG && error != ENOMEM) { @@ -1696,10 +1686,6 @@ mpt_execute_req(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error) hdrp = req->req_vbuf; mpt_off = req->req_vbuf; - if (error == 0 && ((uint32_t)nseg) >= mpt->max_seg_cnt) { - error = EFBIG; - } - if (error == 0) { switch (hdrp->Function) { case MPI_FUNCTION_SCSI_IO_REQUEST: @@ -1718,12 +1704,6 @@ mpt_execute_req(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error) } } - if (error == 0 && ((uint32_t)nseg) >= mpt->max_seg_cnt) { - error = EFBIG; - mpt_prt(mpt, "segment count %d too large (max %u)\n", - nseg, mpt->max_seg_cnt); - } - bad: if (error != 0) { if (error != EFBIG && error != ENOMEM) {
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