RE: mwifiex: propagate error if IRQ request fails in mwifiex_sdio_of()

Hi Javier,

From: Javier Martinez Canillas [mailto:javier@osg.samsung.com]
Sent: Tuesday, September 06, 2016 5:43 PM
To: Kalle Valo
Cc: linux-kernel@vger.kernel.org; Amitkumar Karwar;
netdev@vger.kernel.org; linux-wireless@vger.kernel.org; Nishant
Sarmukadam; Arend van Spriel
Subject: Re: mwifiex: propagate error if IRQ request fails in
mwifiex_sdio_of()

Hello Kalle,

On 09/03/2016 12:35 PM, Kalle Valo wrote:

quoted

Javier Martinez Canillas [off-list ref] wrote:

quoted

If request_irq() fails in mwifiex_sdio_probe_of(), only an error
message is printed but the actual error is not propagated to the

caller function.

quoted

quoted

Signed-off-by: Javier Martinez Canillas <redacted>

What's the conclusion with this patch? Should I drop it or take it?

(The discussion is available from the patchwork link in the
signature.)

My understanding is that Arend agrees with the patch and that the
question raised was caused by looking at an older kernel version. IOW,
the patch is OK and should be picked.

I'm adding Arend to cc, so can comment in case I misunderstood him
though.

This error doesn't affect actual wifi functionality. Only thing is wakeup on interrupt when system is in suspended state won't work.
I think, we can make below change. 

------------------

@@ -122,9 +122,11 @@ static int mwifiex_sdio_probe_of(struct device *dev, struct sdio_mmc_card *card)
                                               IRQF_TRIGGER_LOW,
                                               "wifi_wake", cfg);
           if (ret) {
-                    dev_err(dev,
+                    dev_dbg(dev,
                             "Failed to request irq_wifi %d (%d)\n",
                             cfg->irq_wifi, ret);
+                    card->plt_wake_cfg = NULL;
+                    return 0;
             }
                disable_irq(cfg->irq_wifi);
            }
-----------------

Regards,
Amitkumar