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scsi: ufs: core: Fix shift out of bounds when MAXQ=32

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According to JESD223F, the maximum number of queues (MAXQ) is 32. When MCQ
is enabled and ESI is disabled, nr_hw_queues=32 causes a shift overflow
problem.

Fix this by using 64-bit intermediate values to handle the nr_hw_queues=32
case safely.

Signed-off-by: wangshuaiwei <wangshuaiwei1@xiaomi.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Link: https://patch.msgid.link/20260224063228.50112-1-wangshuaiwei1@xiaomi.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
wangshuaiwei 2026-02-24 14:32:28 +08:00 • committed by Martin K. Petersen
parent 62c015373e
commit 2f38fd99c0
1 changed files with 1 additions and 1 deletions
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2
drivers/ufs/core/ufshcd.c
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@ -7110,7 +7110,7 @@ static irqreturn_t ufshcd_handle_mcq_cq_events(struct ufs_hba *hba)
ret = ufshcd_vops_get_outstanding_cqs(hba, &outstanding_cqs);
if (ret)
outstanding_cqs = (1U << hba->nr_hw_queues) - 1;
outstanding_cqs = (1ULL << hba->nr_hw_queues) - 1;
/* Exclude the poll queues */
nr_queues = hba->nr_hw_queues - hba->nr_queues[HCTX_TYPE_POLL];