diff options
| author | Penghe Geng <pgeng@nvidia.com> | 2026-02-19 15:29:54 -0500 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2026-02-23 13:45:50 +0100 |
| commit | 901084c51a0a8fb42a3f37d2e9c62083c495f824 (patch) | |
| tree | 3c4d2db3a4e8617b08c89c7e2903a096bd39e06b /include/linux/wait_bit.h | |
| parent | 79ad471530e0baef0dce991816013df55e401d9c (diff) | |
mmc: core: Avoid bitfield RMW for claim/retune flags
Move claimed and retune control flags out of the bitfield word to
avoid unrelated RMW side effects in asynchronous contexts.
The host->claimed bit shared a word with retune flags. Writes to claimed
in __mmc_claim_host() or retune_now in mmc_mq_queue_rq() can overwrite
other bits when concurrent updates happen in other contexts, triggering
spurious WARN_ON(!host->claimed). Convert claimed, can_retune,
retune_now and retune_paused to bool to remove shared-word coupling.
Fixes: 6c0cedd1ef952 ("mmc: core: Introduce host claiming by context")
Fixes: 1e8e55b67030c ("mmc: block: Add CQE support")
Cc: stable@vger.kernel.org
Suggested-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Penghe Geng <pgeng@nvidia.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'include/linux/wait_bit.h')
0 files changed, 0 insertions, 0 deletions