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scsi: ufs: core: Avoid IRQ thread wakeup during active UIC command

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Only return IRQ_WAKE_THREAD when MCQ and ESI are not enabled and no UIC
command is active. The default UIC command timeout is 500ms, Using threaded
IRQs during an active UIC command increases the risk of timeout due to
possible preemption by other system IRQs.

Signed-off-by: Peter Wang <peter.wang@mediatek.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Link: https://patch.msgid.link/20260306054419.3816557-1-peter.wang@mediatek.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Peter Wang
2026-03-07 11:06:46 -05:00
committed by Martin K. Petersen
parent b5e21a29fe
commit 6475cfb81f
1 changed files with 6 additions and 2 deletions
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drivers/ufs/core/ufshcd.c
+6 -2
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@@ -7221,8 +7221,12 @@ static irqreturn_t ufshcd_intr(int irq, void *__hba)
struct ufs_hba *hba = __hba;
u32 intr_status, enabled_intr_status;
/* Move interrupt handling to thread when MCQ & ESI are not enabled */
if (!hba->mcq_enabled || !hba->mcq_esi_enabled)
/*
* Handle interrupt in thread if MCQ or ESI is disabled,
* and no active UIC command.
*/
if ((!hba->mcq_enabled || !hba->mcq_esi_enabled) &&
!hba->active_uic_cmd)
return IRQ_WAKE_THREAD;
intr_status = ufshcd_readl(hba, REG_INTERRUPT_STATUS);