Commit 54a4b2b4 authored by Takashi Iwai's avatar Takashi Iwai

ALSA: line6: Fix NULL dereference at podhd_disconnect()

When podhd_init() failed with the acquiring a ctrl i/f, the line6
helper still calls the disconnect callback that eventually calls again
usb_driver_release_interface() with the NULL intf.

Put the proper NULL check before calling it for avoiding an Oops.

Fixes: fc90172b ("ALSA: line6: Claim pod x3 usb data interface")
Reported-by: 's avatarAndrey Konovalov <andreyknvl@google.com>
Tested-by: 's avatarAndrey Konovalov <andreyknvl@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: 's avatarTakashi Iwai <tiwai@suse.de>
parent cb02ffc7
......@@ -301,7 +301,8 @@ static void podhd_disconnect(struct usb_line6 *line6)
intf = usb_ifnum_to_if(line6->usbdev,
pod->line6.properties->ctrl_if);
usb_driver_release_interface(&podhd_driver, intf);
if (intf)
usb_driver_release_interface(&podhd_driver, intf);
}
}
......
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