Return-Path: Message-Id: <20130703184056.983685952@goodmis.org> Date: Wed, 03 Jul 2013 14:40:11 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Takashi Iwai Subject: [074/141] ALSA: usb-audio - Fix invalid volume resolution on Logitech HD webcam c270 References: <20130703183857.307196999@goodmis.org> Content-Disposition: inline; filename=0074-ALSA-usb-audio-Fix-invalid-volume-resolution-on-Logi.patch Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.6.11.6 stable review patch. If anyone has any objections, please let me know. ------------------ From: Takashi Iwai [ Upstream commit 11e7064f35bb87da8f427d1aa4bbd8b7473a3993 ] USB audio driver spews an error message when probing Logitech HD webcam c270: ALSA mixer.c:1300 usb_audio: Warning! Unlikely big volume range (=6144), cval->res is probably wrong. ALSA mixer.c:1304 usb_audio: [5] FU [Mic Capture Volume] ch = 1, val = 1536/7680/1 Obviously the device needs a fixed volume resolution (cval->res = 384) like other Logitech devices. Bugzilla: https://bugzilla.novell.com/show_bug.cgi?id=821735 Reported-and-tested-by: Cristian Rodríguez Cc: Signed-off-by: Takashi Iwai Signed-off-by: Steven Rostedt --- sound/usb/mixer.c | 1 + 1 file changed, 1 insertion(+) diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c index 900bf42..9a9da0a 100644 --- a/sound/usb/mixer.c +++ b/sound/usb/mixer.c @@ -842,6 +842,7 @@ static void volume_control_quirks(struct usb_mixer_elem_info *cval, case USB_ID(0x046d, 0x0808): case USB_ID(0x046d, 0x0809): case USB_ID(0x046d, 0x081d): /* HD Webcam c510 */ + case USB_ID(0x046d, 0x0825): /* HD Webcam c270 */ case USB_ID(0x046d, 0x0991): /* Most audio usb devices lie about volume resolution. * Most Logitech webcams have res = 384. -- 1.7.10.4