[042/126] ALSA: usb-audio: fix endianness bug in snd_nativeinstruments_*

Steven Rostedt
2013-05-07T04:04:45Z

[-- Attachment #1: 0042-ALSA-usb-audio-fix-endianness-bug-in-snd_nativeinstr.patch --]
[-- Type: text/plain, Size: 3291 bytes --]

3.6.11.3 stable review patch.
If anyone has any objections, please let me know.

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

From: Eldad Zack <eldad@fogrefinery.com>

[ Upstream commit 889d66848b12d891248b03abcb2a42047f8e172a ]

The usb_control_msg() function expects __u16 types and performs
the endianness conversions by itself.
However, in three places, a conversion is performed before it is
handed over to usb_control_msg(), which leads to a double conversion
(= no conversion):
* snd_usb_nativeinstruments_boot_quirk()
* snd_nativeinstruments_control_get()
* snd_nativeinstruments_control_put()

Caught by sparse:

sound/usb/mixer_quirks.c:512:38: warning: incorrect type in argument 6 (different base types)
sound/usb/mixer_quirks.c:512:38: expected unsigned short [unsigned] [usertype] index
sound/usb/mixer_quirks.c:512:38: got restricted __le16 [usertype] <noident>
sound/usb/mixer_quirks.c:543:35: warning: incorrect type in argument 5 (different base types)
sound/usb/mixer_quirks.c:543:35: expected unsigned short [unsigned] [usertype] value
sound/usb/mixer_quirks.c:543:35: got restricted __le16 [usertype] <noident>
sound/usb/mixer_quirks.c:543:56: warning: incorrect type in argument 6 (different base types)
sound/usb/mixer_quirks.c:543:56: expected unsigned short [unsigned] [usertype] index
sound/usb/mixer_quirks.c:543:56: got restricted __le16 [usertype] <noident>
sound/usb/quirks.c:502:35: warning: incorrect type in argument 5 (different base types)
sound/usb/quirks.c:502:35: expected unsigned short [unsigned] [usertype] value
sound/usb/quirks.c:502:35: got restricted __le16 [usertype] <noident>

Signed-off-by: Eldad Zack <eldad@fogrefinery.com>
Acked-by: Daniel Mack <zonque@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
sound/usb/mixer_quirks.c | 4 ++--
sound/usb/quirks.c | 2 +-
2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/sound/usb/mixer_quirks.c b/sound/usb/mixer_quirks.c
index ae2b714..76e7dda 100644
--- a/sound/usb/mixer_quirks.c
+++ b/sound/usb/mixer_quirks.c
@@ -493,7 +493,7 @@ static int snd_nativeinstruments_control_get(struct snd_kcontrol *kcontrol,
else
ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), bRequest,
USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
- 0, cpu_to_le16(wIndex),
+ 0, wIndex,
&tmp, sizeof(tmp), 1000);
up_read(&mixer->chip->shutdown_rwsem);

@@ -524,7 +524,7 @@ static int snd_nativeinstruments_control_put(struct snd_kcontrol *kcontrol,
else
ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), bRequest,
USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
- cpu_to_le16(wValue), cpu_to_le16(wIndex),
+ wValue, wIndex,
NULL, 0, 1000);
up_read(&mixer->chip->shutdown_rwsem);

diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index 0f58b4b..213ecad 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -484,7 +484,7 @@ static int snd_usb_nativeinstruments_boot_quirk(struct usb_device *dev)
{
int ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
0xaf, USB_TYPE_VENDOR | USB_RECIP_DEVICE,
- cpu_to_le16(1), 0, NULL, 0, 1000);
+ 1, 0, NULL, 0, 1000);

if (ret < 0)
return ret;
--
1.7.10.4