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authorTakashi Iwai <tiwai@suse.de>2019-11-14 19:56:13 +0300
committerTakashi Iwai <tiwai@suse.de>2019-11-14 20:02:38 +0300
commitf35ef592477c5347b8f780a5f0d4970671e22c61 (patch)
treeb19652e43f89f4b8be1a22378a31fba657a98e6d /sound/usb/card.c
parentcb45722b289b54476b68883985c2824c69a7fba9 (diff)
downloadlinux-f35ef592477c5347b8f780a5f0d4970671e22c61.tar.xz
ALSA: usb-audio: Add skip_validation option
The unit descriptor validation may lead to a probe error when the device provides a buggy descriptor or the validator detected incorrectly. For identifying such an error and band-aiding, give a new module option, skip_validation. With this option, the driver ignores the validation errors with the hexdump of the unit descriptor, so we can check it in a bit more details. Link: https://lore.kernel.org/r/20191114165613.7422-2-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb/card.c')
-rw-r--r--sound/usb/card.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/sound/usb/card.c b/sound/usb/card.c
index db91dc76cc91..9f743ebae615 100644
--- a/sound/usb/card.c
+++ b/sound/usb/card.c
@@ -74,6 +74,7 @@ static bool autoclock = true;
static char *quirk_alias[SNDRV_CARDS];
bool snd_usb_use_vmalloc = true;
+bool snd_usb_skip_validation;
module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for the USB audio adapter.");
@@ -96,6 +97,8 @@ module_param_array(quirk_alias, charp, NULL, 0444);
MODULE_PARM_DESC(quirk_alias, "Quirk aliases, e.g. 0123abcd:5678beef.");
module_param_named(use_vmalloc, snd_usb_use_vmalloc, bool, 0444);
MODULE_PARM_DESC(use_vmalloc, "Use vmalloc for PCM intermediate buffers (default: yes).");
+module_param_named(skip_validation, snd_usb_skip_validation, bool, 0444);
+MODULE_PARM_DESC(skip_validation, "Skip unit descriptor validation (default: no).");
/*
* we keep the snd_usb_audio_t instances by ourselves for merging