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ALSA: snd-usb-audio: set the timeout for usb control set messages to 5000 ms 

Set the timeout for USB control set messages according to the USB 2
spec, using the macros from include/linux/usb.h.
The get timout becomes 5000 ms even though it is 500 ms in the
spec. This patch is required to run the Hercules RMX2 which needs a
timeout of 1240 ms.

More notes from author:
I still distinguish between set and get but as long both are 5000 ms
GCC will remove it anyway. IMHO this is more easy read and there is no
need to explain why we use a get timeout for set messages.

Signed-off-by: Daniel Schürmann <daschuer@mixxx.org>
Acked-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Daniel Schürmann 2013-04-20 23:06:17 +02:00 committed by Takashi Iwai
parent 47966e9779
commit b5f035dbca
1 changed files with 9 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
sound/usb/helper.c
View File

@ -86,14 +86,22 @@ int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe, __u8 request,
{
int err;
void *buf = NULL;
int timeout;
if (size > 0) {
buf = kmemdup(data, size, GFP_KERNEL);
if (!buf)
return -ENOMEM;
}
if (requesttype & USB_DIR_IN)
timeout = USB_CTRL_GET_TIMEOUT;
else
timeout = USB_CTRL_SET_TIMEOUT;
err = usb_control_msg(dev, pipe, request, requesttype,
value, index, buf, size, 1000);
value, index, buf, size, timeout);
if (size > 0) {
memcpy(data, buf, size);
kfree(buf);