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Commit ccd57f83 authored by Sriharsha Allenki's avatar Sriharsha Allenki
Browse files

usb: gadget: f_uac2: Fix sound card registration failure 



Sound card registration fails when adb is rerun as root.
The cause is the limitation in kernel/ALSA in proper
cleaning up of the  the parent of sound card when the sound
card is removed. Fix this by pointing to a parent that
will not be removed during sound card free.

Change-Id: Id9354be1c2dc459fbd0a88be4ff3f167dff8f4d9
Signed-off-by: default avatarSriharsha Allenki <sallenki@codeaurora.org>
parent d9f72f76

drivers/usb/gadget/function/f_uac2.c

+3 −1
Original line number Diff line number Diff line
@@ -128,6 +128,7 @@ struct audio_dev { 


	/* The ALSA Sound Card it represents on the USB-Client side */

	struct snd_uac2_chip uac2;

	struct device *gdev;

};



static inline
@@ -457,7 +458,7 @@ static int snd_uac2_probe(struct platform_device *pdev) 
	c_chmask = opts->c_chmask;



	/* Choose any slot, with no id */

	err = snd_card_new(&pdev->dev, -1, NULL, THIS_MODULE, 0, &card);

	err = snd_card_new(audio_dev->gdev, -1, NULL, THIS_MODULE, 0, &card);

	if (err < 0)

		return err;
@@ -1109,6 +1110,7 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn) 
		goto err;

	}



	agdev->gdev = &gadget->dev;

	ret = alsa_uac2_init(agdev);

	if (ret)

		goto err;