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authorMing Lei <ming.lei@redhat.com>2025-02-25 05:21:41 +0300
committerJens Axboe <axboe@kernel.dk>2025-02-25 18:41:32 +0300
commit889c57066ceee5e9172232da0608a8ac053bb6e5 (patch)
tree20b4dee2aac9d63a80b5860c29a3f15ee584b6e1 /scripts/extract-fwblobs
parent70550442f28eba83b3e659618bba2b64eb91575f (diff)
downloadlinux-889c57066ceee5e9172232da0608a8ac053bb6e5.tar.xz
block: make segment size limit workable for > 4K PAGE_SIZE
Using PAGE_SIZE as a minimum expected DMA segment size in consideration of devices which have a max DMA segment size of < 64k when used on 64k PAGE_SIZE systems leads to devices not being able to probe such as eMMC and Exynos UFS controller [0] [1] you can end up with a probe failure as follows: WARNING: CPU: 2 PID: 397 at block/blk-settings.c:339 blk_validate_limits+0x364/0x3c0 Ensure we use min(max_seg_size, seg_boundary_mask + 1) as the new min segment size when max segment size is < PAGE_SIZE for 16k and 64k base page size systems. If anyone need to backport this patch, the following commits are depended: commit 6aeb4f836480 ("block: remove bio_add_pc_page") commit 02ee5d69e3ba ("block: remove blk_rq_bio_prep") commit b7175e24d6ac ("block: add a dma mapping iterator") Link: https://lore.kernel.org/linux-block/20230612203314.17820-1-bvanassche@acm.org/ # [0] Link: https://lore.kernel.org/linux-block/1d55e942-5150-de4c-3a02-c3d066f87028@acm.org/ # [1] Cc: Yi Zhang <yi.zhang@redhat.com> Cc: John Garry <john.g.garry@oracle.com> Cc: Keith Busch <kbusch@kernel.org> Tested-by: Paul Bunyan <pbunyan@redhat.com> Reviewed-by: Daniel Gomez <da.gomez@kernel.org> Reviewed-by: Luis Chamberlain <mcgrof@kernel.org> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Ming Lei <ming.lei@redhat.com> Link: https://lore.kernel.org/r/20250225022141.2154581-1-ming.lei@redhat.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
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