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authorTakashi Iwai <tiwai@suse.de>2012-11-20 18:24:47 +0100
committerTakashi Iwai <tiwai@suse.de>2012-11-21 11:37:40 +0100
commit20d32022a8d8639a33d0e429f2d3c51b527ea362 (patch)
tree361cb984165311d03c39849f402d7ee4e075d9d8
parent8ad10dc6d3fe8396d8213af4d5ce58e0010a3cbc (diff)
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ALSA: usb-audio: Deprecate async_unlink option
The async unlink behavior has been working over years. The option was provided only as a workaround for 2.4.x kernel. Let's get rid of it. Signed-off-by: Takashi Iwai <tiwai@suse.de>
-rw-r--r--Documentation/sound/alsa/ALSA-Configuration.txt3
-rw-r--r--sound/usb/card.c7
-rw-r--r--sound/usb/endpoint.c2
-rw-r--r--sound/usb/usbaudio.h1
4 files changed, 1 insertions, 12 deletions
diff --git a/Documentation/sound/alsa/ALSA-Configuration.txt b/Documentation/sound/alsa/ALSA-Configuration.txt
index d90d8ec2853d..b9cfd339a6fa 100644
--- a/Documentation/sound/alsa/ALSA-Configuration.txt
+++ b/Documentation/sound/alsa/ALSA-Configuration.txt
@@ -1905,7 +1905,6 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
vid - Vendor ID for the device (optional)
pid - Product ID for the device (optional)
nrpacks - Max. number of packets per URB (default: 8)
- async_unlink - Use async unlink mode (default: yes)
device_setup - Device specific magic number (optional)
- Influence depends on the device
- Default: 0x0000
@@ -1917,8 +1916,6 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
NB: nrpacks parameter can be modified dynamically via sysfs.
Don't put the value over 20. Changing via sysfs has no sanity
check.
- NB: async_unlink=0 would cause Oops. It remains just for
- debugging purpose (if any).
NB: ignore_ctl_error=1 may help when you get an error at accessing
the mixer element such as URB error -22. This happens on some
buggy USB device or the controller.
diff --git a/sound/usb/card.c b/sound/usb/card.c
index dbf7999d18b4..ccf95cfe186f 100644
--- a/sound/usb/card.c
+++ b/sound/usb/card.c
@@ -25,9 +25,6 @@
*
* NOTES:
*
- * - async unlink should be used for avoiding the sleep inside lock.
- * 2.4.22 usb-uhci seems buggy for async unlinking and results in
- * oops. in such a cse, pass async_unlink=0 option.
* - the linked URBs would be preferred but not used so far because of
* the instability of unlinking.
* - type II is not supported properly. there is no device which supports
@@ -83,7 +80,6 @@ static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;/* Enable this card *
static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
static int nrpacks = 8; /* max. number of packets per urb */
-static bool async_unlink = 1;
static int device_setup[SNDRV_CARDS]; /* device parameter for this card */
static bool ignore_ctl_error;
@@ -99,8 +95,6 @@ module_param_array(pid, int, NULL, 0444);
MODULE_PARM_DESC(pid, "Product ID for the USB audio device.");
module_param(nrpacks, int, 0644);
MODULE_PARM_DESC(nrpacks, "Max. number of packets per URB.");
-module_param(async_unlink, bool, 0444);
-MODULE_PARM_DESC(async_unlink, "Use async unlink mode.");
module_param_array(device_setup, int, NULL, 0444);
MODULE_PARM_DESC(device_setup, "Specific device setup (if needed).");
module_param(ignore_ctl_error, bool, 0444);
@@ -345,7 +339,6 @@ static int snd_usb_audio_create(struct usb_device *dev, int idx,
chip->card = card;
chip->setup = device_setup[idx];
chip->nrpacks = nrpacks;
- chip->async_unlink = async_unlink;
chip->probing = 1;
chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c
index 51a9aa372cc7..d7382a5e29bb 100644
--- a/sound/usb/endpoint.c
+++ b/sound/usb/endpoint.c
@@ -523,7 +523,7 @@ static int deactivate_urbs(struct snd_usb_endpoint *ep, int force, int can_sleep
if (!force && ep->chip->shutdown) /* to be sure... */
return -EBADFD;
- async = !can_sleep && ep->chip->async_unlink;
+ async = !can_sleep;
clear_bit(EP_FLAG_RUNNING, &ep->flags);
diff --git a/sound/usb/usbaudio.h b/sound/usb/usbaudio.h
index ef42797f56fb..1ac3fd9cc5a6 100644
--- a/sound/usb/usbaudio.h
+++ b/sound/usb/usbaudio.h
@@ -56,7 +56,6 @@ struct snd_usb_audio {
int setup; /* from the 'device_setup' module param */
int nrpacks; /* from the 'nrpacks' module param */
- int async_unlink; /* from the 'async_unlink' module param */
struct usb_host_interface *ctrl_intf; /* the audio control interface */
};