From: Jeffrey Hugo <jhugo@codeaurora.org>
To: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>,
Bhaumik Bhatt <bbhatt@codeaurora.org>
Cc: linux-arm-msm@vger.kernel.org, hemantk@codeaurora.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v1 04/10] bus: mhi: core: Use the IRQF_ONESHOT flag for the BHI interrupt line
Date: Fri, 9 Oct 2020 10:04:02 -0600 [thread overview]
Message-ID: <26de08b5-b477-c5b9-fdca-eb80bcf98561@codeaurora.org> (raw)
In-Reply-To: <20201009155706.GE4810@Mani-XPS-13-9360>
On 10/9/2020 9:57 AM, Manivannan Sadhasivam wrote:
> On Fri, Sep 18, 2020 at 07:02:29PM -0700, Bhaumik Bhatt wrote:
>> 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,
>
> Jeff, I believe you're the one requested for shared irq during initial push.
> Are you okay with this?
Nope :)
AIC100 has a single interrupt for BHI/MHI activity, so this needs to be
shared.
--
Jeffrey Hugo
Qualcomm Technologies, Inc. is a member of the
Code Aurora Forum, a Linux Foundation Collaborative Project.
next prev parent reply other threads:[~2020-10-09 16:05 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 ` [PATCH v1 04/10] bus: mhi: core: Use the IRQF_ONESHOT flag for the BHI interrupt line Bhaumik Bhatt
2020-10-09 15:57 ` Manivannan Sadhasivam
2020-10-09 16:04 ` Jeffrey Hugo [this message]
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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