netdev - Re: [PATCH] ath10k: Fix qmi init error handling

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Message-ID: <87d0dws79m.fsf@kamboji.qca.qualcomm.com>
Date:   Wed, 13 Nov 2019 06:57:25 +0200
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Jeffrey Hugo <jeffrey.l.hugo@...il.com>
Cc:     Simon Horman <simon.horman@...ronome.com>, davem@...emloft.net,
        ath10k@...ts.infradead.org, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org, MSM <linux-arm-msm@...r.kernel.org>,
        lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ath10k: Fix qmi init error handling

Jeffrey Hugo <jeffrey.l.hugo@...il.com> writes:

> On Tue, Nov 12, 2019 at 1:42 AM Simon Horman <simon.horman@...ronome.com> wrote:
>>
>> On Wed, Nov 06, 2019 at 03:16:50PM -0800, Jeffrey Hugo wrote:
>> > When ath10k_qmi_init() fails, the error handling does not free the irq
>> > resources, which causes an issue if we EPROBE_DEFER as we'll attempt to
>> > (re-)register irqs which are already registered.
>> >
>> > Fixes: ba94c753ccb4 ("ath10k: add QMI message handshake for wcn3990 client")
>> > Signed-off-by: Jeffrey Hugo <jeffrey.l.hugo@...il.com>
>> > ---
>> >  drivers/net/wireless/ath/ath10k/snoc.c | 2 +-
>> >  1 file changed, 1 insertion(+), 1 deletion(-)
>> >
>> > diff --git a/drivers/net/wireless/ath/ath10k/snoc.c b/drivers/net/wireless/ath/ath10k/snoc.c
>> > index fc15a0037f0e..f2a0b7aaad3b 100644
>> > --- a/drivers/net/wireless/ath/ath10k/snoc.c
>> > +++ b/drivers/net/wireless/ath/ath10k/snoc.c
>> > @@ -1729,7 +1729,7 @@ static int ath10k_snoc_probe(struct platform_device *pdev)
>> >       ret = ath10k_qmi_init(ar, msa_size);
>> >       if (ret) {
>> >               ath10k_warn(ar, "failed to register wlfw qmi client: %d\n", ret);
>> > -             goto err_core_destroy;
>> > +             goto err_free_irq;
>> >       }
>>
>> From a casual examination of the code this seems like a step in the right
>> direction. But does this error path also need to call ath10k_hw_power_off() ?
>
> It probably should.  I don't see any fatal errors from the step being
> skipped, although it might silence some regulator warnings about being
> left on.  Unlikely to be observed by most folks as I was initing the
> driver pretty early to debug some things.  Looks like Kalle already
> picked up this patch though, so I guess your suggestion would need to
> be a follow up.

Actually it's only in the pending branch, which means that the patch can
be changed or a new version can be submitted:

https://wireless.wiki.kernel.org/en/users/drivers/ath10k/submittingpatches#patch_flow

The easiest way to check the state of a wireless patch is from
patchwork:

https://patchwork.kernel.org/patch/11231325/

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

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