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Subject: Re: [PATCH] ath10k: fix PCIE device wake up failed
From:   Kalle Valo <kvalo@codeaurora.org>
In-Reply-To: <1559180960-13565-1-git-send-email-miaoqing@codeaurora.org>
References: <1559180960-13565-1-git-send-email-miaoqing@codeaurora.org>
To:     Miaoqing Pan <miaoqing@codeaurora.org>
Cc:     ath10k@lists.infradead.org, linux-wireless@vger.kernel.org,
        Miaoqing Pan <miaoqing@codeaurora.org>
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Message-Id: <20190625130332.31D9F60300@smtp.codeaurora.org>
Date:   Tue, 25 Jun 2019 13:03:32 +0000 (UTC)
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Miaoqing Pan <miaoqing@codeaurora.org> wrote:

> Observed PCIE device wake up failed after ~120 iterations of
> soft-reboot test. The error message is
> "ath10k_pci 0000:01:00.0: failed to wake up device : -110"
> 
> The call trace as below:
> ath10k_pci_probe -> ath10k_pci_force_wake -> ath10k_pci_wake_wait ->
> ath10k_pci_is_awake
> 
> Once trigger the device to wake up, we will continuously check the RTC
> state until it returns RTC_STATE_V_ON or timeout.
> 
> But for QCA99x0 chips, we use wrong value for RTC_STATE_V_ON.
> Occasionally, we get 0x7 on the fist read, we thought as a failure
> case, but actually is the right value, also verified with the spec.
> So fix the issue by changing RTC_STATE_V_ON from 0x5 to 0x7, passed
> ~2000 iterations.
> 
> Tested HW: QCA9984
> 
> Signed-off-by: Miaoqing Pan <miaoqing@codeaurora.org>
> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

Patch applied to ath-next branch of ath.git, thanks.

011d4111c8c6 ath10k: fix PCIE device wake up failed

-- 
https://patchwork.kernel.org/patch/10968039/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches