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dacc73ed0b
linux/drivers/block
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Xie Yongji dacc73ed0b virtio-blk: Don't use MAX_DISCARD_SEGMENTS if max_discard_seg is zero 
Currently the value of max_discard_segment will be set to
MAX_DISCARD_SEGMENTS (256) with no basis in hardware if device
set 0 to max_discard_seg in configuration space. It's incorrect
since the device might not be able to handle such large descriptors.
To fix it, let's follow max_segments restrictions in this case.

Fixes: 1f23816b8e ("virtio_blk: add discard and write zeroes support")
Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
Link: https://lore.kernel.org/r/20220304100058.116-1-xieyongji@bytedance.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-03-06 06:06:50 -05:00
..
aoe aoe: remove redundant assignment on variable n 2022-01-13 13:00:45 -07:00
drbd drbd: Use struct_group() to zero algs 2021-12-13 16:31:24 -07:00
mtip32xx block: fix surprise removal for drivers calling blk_set_queue_dying 2022-02-17 07:54:03 -07:00
null_blk block: null_blk: only set set->nr_maps as 3 if active poll_queues is > 0 2021-12-23 22:05:50 -07:00
paride Char/Misc and other driver changes for 5.17-rc1 2022-01-14 16:02:28 +01:00
rnbd bitmap patches for 5.17-rc1 2022-01-23 06:20:44 +02:00
xen-blkback block: remove GENHD_FL_CD 2021-11-29 06:35:21 -07:00
zram Merge branch 'akpm' (patches from Andrew) 2022-01-15 20:37:06 +02:00
amiflop.c block: remove the ->rq_disk field in struct request 2021-11-29 06:41:29 -07:00
ataflop.c block: remove the ->rq_disk field in struct request 2021-11-29 06:41:29 -07:00
brd.c brd: remove brd_devices_mutex mutex 2022-01-17 07:19:40 -07:00
floppy.c floppy: Add max size check for user space request 2021-12-03 06:32:40 -07:00
Kconfig block: remove the rsxx driver 2021-12-16 10:57:04 -07:00
loop.c block: loop:use kstatfs.f_bsize of backing file to set discard granularity 2022-02-11 15:10:49 -07:00
loop.h loop: revert "make autoclear operation asynchronous" 2022-02-11 05:51:23 -07:00
Makefile block: remove the rsxx driver 2021-12-16 10:57:04 -07:00
n64cart.c block: rename GENHD_FL_NO_PART_SCAN to GENHD_FL_NO_PART 2021-11-29 06:35:21 -07:00
nbd.c for-5.16/drivers-2021-11-09 2021-11-09 11:24:08 -08:00
pktcdvd.c pktcdvd: convert to use attribute groups 2022-01-03 21:24:34 -07:00
ps3disk.c ps3disk: add error handling support for add_disk() 2021-10-30 11:03:37 -06:00
ps3vram.c block: remove GENHD_FL_EXT_DEVT 2021-11-29 06:38:35 -07:00
rbd_types.h libceph, rbd: replace zero-length array with flexible-array 2020-06-01 13:22:53 +02:00
rbd.c block: fix surprise removal for drivers calling blk_set_queue_dying 2022-02-17 07:54:03 -07:00
sunvdc.c block: remove the ->rq_disk field in struct request 2021-11-29 06:41:29 -07:00
swim3.c block: remove GENHD_FL_EXT_DEVT 2021-11-29 06:38:35 -07:00
swim_asm.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
swim.c block: remove GENHD_FL_EXT_DEVT 2021-11-29 06:38:35 -07:00
sx8.c block: remove the gendisk argument to blk_execute_rq 2021-11-29 06:41:29 -07:00
virtio_blk.c virtio-blk: Don't use MAX_DISCARD_SEGMENTS if max_discard_seg is zero 2022-03-06 06:06:50 -05:00
xen-blkfront.c block: fix surprise removal for drivers calling blk_set_queue_dying 2022-02-17 07:54:03 -07:00
z2ram.c block: remove GENHD_FL_EXT_DEVT 2021-11-29 06:38:35 -07:00