From: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
To: Bhaumik Bhatt <bbhatt@codeaurora.org>
Cc: linux-arm-msm@vger.kernel.org, hemantk@codeaurora.org,
jhugo@codeaurora.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v1 03/10] bus: mhi: core: Skip device wake in error or shutdown states
Date: Fri, 9 Oct 2020 21:24:19 +0530 [thread overview]
Message-ID: <20201009155419.GD4810@Mani-XPS-13-9360> (raw)
In-Reply-To: <1600480955-16827-4-git-send-email-bbhatt@codeaurora.org>
On Fri, Sep 18, 2020 at 07:02:28PM -0700, Bhaumik Bhatt wrote:
> MHI clients can request a device wake even if the device may be in an
> error state or undergoing shutdown. To prevent unnecessary device wake
> processing, check for the device state and bail out early so that the
> clients are made aware of the device state sooner.
>
Please use the term "client drivers" everywhere. With that,
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Thanks,
Mani
> Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
> ---
> drivers/bus/mhi/core/pm.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/drivers/bus/mhi/core/pm.c b/drivers/bus/mhi/core/pm.c
> index 9d4789d..1862960 100644
> --- a/drivers/bus/mhi/core/pm.c
> +++ b/drivers/bus/mhi/core/pm.c
> @@ -827,6 +827,10 @@ int __mhi_device_get_sync(struct mhi_controller *mhi_cntrl)
>
> /* Wake up the device */
> read_lock_bh(&mhi_cntrl->pm_lock);
> + if (MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) {
> + read_unlock_bh(&mhi_cntrl->pm_lock);
> + return -EIO;
> + }
> mhi_cntrl->wake_get(mhi_cntrl, true);
> if (MHI_PM_IN_SUSPEND_STATE(mhi_cntrl->pm_state))
> mhi_trigger_resume(mhi_cntrl);
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>
next prev parent reply other threads:[~2020-10-09 15:54 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 [this message]
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
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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