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From: Bhaumik Bhatt <bbhatt@codeaurora.org>
To: manivannan.sadhasivam@linaro.org
Cc: linux-arm-msm@vger.kernel.org, hemantk@codeaurora.org,
	jhugo@codeaurora.org, linux-kernel@vger.kernel.org,
	Bhaumik Bhatt <bbhatt@codeaurora.org>
Subject: [PATCH v1 04/10] bus: mhi: core: Use the IRQF_ONESHOT flag for the BHI interrupt line
Date: Fri, 18 Sep 2020 19:02:29 -0700	[thread overview]
Message-ID: <1600480955-16827-5-git-send-email-bbhatt@codeaurora.org> (raw)
In-Reply-To: <1600480955-16827-1-git-send-email-bbhatt@codeaurora.org>

Remove the IRQF_SHARED flag as it is not needed for the BHI interrupt
and replace it with IRQF_ONESHOT so that host can be sure that the
next BHI hard interrupt is triggered only when the threaded interrupt
handler has returned. This is to avoid any race conditions we may run
into if BHI interrupts fire one after another.

Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
---
 drivers/bus/mhi/core/init.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c
index ca32563..9ae4c19 100644
--- a/drivers/bus/mhi/core/init.c
+++ b/drivers/bus/mhi/core/init.c
@@ -167,7 +167,7 @@ int mhi_init_irq_setup(struct mhi_controller *mhi_cntrl)
 	/* Setup BHI_INTVEC IRQ */
 	ret = request_threaded_irq(mhi_cntrl->irq[0], mhi_intvec_handler,
 				   mhi_intvec_threaded_handler,
-				   IRQF_SHARED | IRQF_NO_SUSPEND,
+				   IRQF_ONESHOT | IRQF_NO_SUSPEND,
 				   "bhi", mhi_cntrl);
 	if (ret)
 		return ret;
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


  parent reply	other threads:[~2020-09-19  2:03 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-19  2:02 [PATCH v1 00/10] Bug fixes and improvements for MHI power operations Bhaumik Bhatt
2020-09-19  2:02 ` [PATCH v1 01/10] bus: mhi: core: Use appropriate names for firmware load functions Bhaumik Bhatt
2020-10-09 15:23   ` Manivannan Sadhasivam
2020-09-19  2:02 ` [PATCH v1 02/10] bus: mhi: core: Move to using high priority workqueue Bhaumik Bhatt
2020-10-09 15:49   ` Manivannan Sadhasivam
2020-09-19  2:02 ` [PATCH v1 03/10] bus: mhi: core: Skip device wake in error or shutdown states Bhaumik Bhatt
2020-10-09 15:54   ` Manivannan Sadhasivam
2020-09-19  2:02 ` Bhaumik Bhatt [this message]
2020-10-09 15:57   ` [PATCH v1 04/10] bus: mhi: core: Use the IRQF_ONESHOT flag for the BHI interrupt line Manivannan Sadhasivam
2020-10-09 16:04     ` Jeffrey Hugo
2020-10-12 23:52       ` Bhaumik Bhatt
2020-09-19  2:02 ` [PATCH v1 05/10] bus: mhi: core: Disable IRQs when powering down Bhaumik Bhatt
2020-10-09 16:02   ` Manivannan Sadhasivam
2020-10-13  0:03     ` Bhaumik Bhatt
2020-10-10 23:45   ` Manu Gautam
2020-09-19  2:02 ` [PATCH v1 06/10] bus: mhi: core: Improve shutdown handling after link down detection Bhaumik Bhatt
2020-10-09 16:19   ` Manivannan Sadhasivam
2020-10-13 18:40     ` Bhaumik Bhatt
2020-10-11  0:06   ` Manu Gautam
2020-09-19  2:02 ` [PATCH v1 07/10] bus: mhi: core: Move to SYS_ERROR regardless of RDDM capability Bhaumik Bhatt
2020-10-09 16:32   ` Manivannan Sadhasivam
2020-10-14  1:06     ` Bhaumik Bhatt
2020-09-19  2:02 ` [PATCH v1 08/10] bus: mhi: core: Move to an error state on any firmware load failure Bhaumik Bhatt
2020-10-09 16:42   ` Manivannan Sadhasivam
2020-10-14  1:37     ` Bhaumik Bhatt
2020-09-19  2:02 ` [PATCH v1 09/10] bus: mhi: core: Move to an error state on mission mode failure Bhaumik Bhatt
2020-10-09 16:44   ` Manivannan Sadhasivam
2020-09-19  2:02 ` [PATCH v1 10/10] bus: mhi: core: Mark device inactive soon after host issues a shutdown Bhaumik Bhatt
2020-10-09 17:18   ` Manivannan Sadhasivam
2020-10-11  0:17   ` Manu Gautam

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