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authorClemens Ladisch <clemens@ladisch.de>2006-05-18 09:35:15 +0200
committerJaroslav Kysela <perex@suse.cz>2006-06-22 21:33:47 +0200
commitfaf8d11743961c720c85be191f8a08c00e5c5d60 (patch)
treec769a20e29e8fa2f43c4f01e410ed502bf9ecdef /sound/usb/usbaudio.c
parent474167d646cb2147b9fcd7bacf5cdf8177ed43c4 (diff)
downloadlinux-2.6.34-ux500-faf8d11743961c720c85be191f8a08c00e5c5d60.tar.gz
[ALSA] usb-audio: add workaround for CSR Bluetooth Headphones (Saitek A-250)
Some devices don't have the required class-specific endpoint descriptors. Instead of making this case an error, this patch makes the driver guess the endpoint attributes. Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Diffstat (limited to 'sound/usb/usbaudio.c')
-rw-r--r--sound/usb/usbaudio.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c
index 8100516e1f7..770642a5953 100644
--- a/sound/usb/usbaudio.c
+++ b/sound/usb/usbaudio.c
@@ -2627,9 +2627,10 @@ static int parse_audio_endpoints(struct snd_usb_audio *chip, int iface_no)
if (!csep && altsd->bNumEndpoints >= 2)
csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT);
if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
- snd_printk(KERN_ERR "%d:%u:%d : no or invalid class specific endpoint descriptor\n",
+ snd_printk(KERN_WARN "%d:%u:%d : no or invalid"
+ " class specific endpoint descriptor\n",
dev->devnum, iface_no, altno);
- continue;
+ csep = NULL;
}
fp = kmalloc(sizeof(*fp), GFP_KERNEL);
@@ -2648,7 +2649,7 @@ static int parse_audio_endpoints(struct snd_usb_audio *chip, int iface_no)
if (snd_usb_get_speed(dev) == USB_SPEED_HIGH)
fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
* (fp->maxpacksize & 0x7ff);
- fp->attributes = csep[3];
+ fp->attributes = csep ? csep[3] : 0;
/* some quirks for attributes here */