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| author | Clemens Ladisch <clemens@ladisch.de> | 2006-03-09 07:58:39 +0100 |
|---|---|---|
| committer | Jaroslav Kysela <perex@suse.cz> | 2006-03-22 10:36:37 +0100 |
| commit | 32e19e882c722b41f37e90956bf12eacdaba6f2b (patch) | |
| tree | 037597e64ca2cf4545264fbc29247af97c859da2 /sound/usb/usbaudio.c | |
| parent | [ALSA] usb-audio: add Casio AP-80R support (diff) | |
| download | linux-32e19e882c722b41f37e90956bf12eacdaba6f2b.tar.xz linux-32e19e882c722b41f37e90956bf12eacdaba6f2b.zip | |
[ALSA] usb-audio: show USB error descriptions
Modules: USB generic driver
When usb_submit_urb() fails, show an error description instead of just
the error code.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Diffstat (limited to 'sound/usb/usbaudio.c')
| -rw-r--r-- | sound/usb/usbaudio.c | 39 |
1 files changed, 35 insertions, 4 deletions
diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c index 039f27dc1f08..45157d3cf789 100644 --- a/sound/usb/usbaudio.c +++ b/sound/usb/usbaudio.c @@ -773,6 +773,31 @@ static int deactivate_urbs(struct snd_usb_substream *subs, int force, int can_sl } +static const char *usb_error_string(int err) +{ + switch (err) { + case -ENODEV: + return "no device"; + case -ENOENT: + return "endpoint not enabled"; + case -EPIPE: + return "endpoint stalled"; + case -ENOSPC: + return "not enough bandwidth"; + case -ESHUTDOWN: + return "device disabled"; + case -EHOSTUNREACH: + return "device suspended"; + case -EINVAL: + case -EAGAIN: + case -EFBIG: + case -EMSGSIZE: + return "internal error"; + default: + return "unknown error"; + } +} + /* * set up and start data/sync urbs */ @@ -805,16 +830,22 @@ static int start_urbs(struct snd_usb_substream *subs, struct snd_pcm_runtime *ru subs->unlink_mask = 0; subs->running = 1; for (i = 0; i < subs->nurbs; i++) { - if ((err = usb_submit_urb(subs->dataurb[i].urb, GFP_ATOMIC)) < 0) { - snd_printk(KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err); + err = usb_submit_urb(subs->dataurb[i].urb, GFP_ATOMIC); + if (err < 0) { + snd_printk(KERN_ERR "cannot submit datapipe " + "for urb %d, error %d: %s\n", + i, err, usb_error_string(err)); goto __error; } set_bit(i, &subs->active_mask); } if (subs->syncpipe) { for (i = 0; i < SYNC_URBS; i++) { - if ((err = usb_submit_urb(subs->syncurb[i].urb, GFP_ATOMIC)) < 0) { - snd_printk(KERN_ERR "cannot submit syncpipe for urb %d, err = %d\n", i, err); + err = usb_submit_urb(subs->syncurb[i].urb, GFP_ATOMIC); + if (err < 0) { + snd_printk(KERN_ERR "cannot submit syncpipe " + "for urb %d, error %d: %s\n", + i, err, usb_error_string(err)); goto __error; } set_bit(i + 16, &subs->active_mask); |