[alsa-devel] [PATCH] ALSA: snd-usb-usx2y: fix start frame mask
This patch is based on a change proposed by Guido Aulisi in a discussion on LAU which can be followed here:
http://linuxaudio.org/mailarchive/lau/2013/5/20/200177
Cc: fzu@wemgehoertderstaat.de Original-code-by: Guido Aulisi guido.aulisi@gmail.com Tested-by: Dr Nicholas J Bailey nicholas.bailey@glasgow.ac.uk Signed-off-by: Daniel Mack zonque@gmail.com --- sound/usb/usx2y/usbusx2yaudio.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sound/usb/usx2y/usbusx2yaudio.c b/sound/usb/usx2y/usbusx2yaudio.c index 63fb521..cd16fcc 100644 --- a/sound/usb/usx2y/usbusx2yaudio.c +++ b/sound/usb/usx2y/usbusx2yaudio.c @@ -328,7 +328,7 @@ static void i_usX2Y_urb_complete(struct urb *urb) usX2Y_error_urb_status(usX2Y, subs, urb); return; } - if (likely((urb->start_frame & 0xFFFF) == (usX2Y->wait_iso_frame & 0xFFFF))) + if (likely((urb->start_frame & 0x03FF) == (usX2Y->wait_iso_frame & 0x03FF))) subs->completed_urb = urb; else { usX2Y_error_sequence(usX2Y, subs, urb);
At Wed, 2 Oct 2013 15:39:57 +0200, Daniel Mack wrote:
This patch is based on a change proposed by Guido Aulisi in a discussion on LAU which can be followed here:
http://linuxaudio.org/mailarchive/lau/2013/5/20/200177
Cc: fzu@wemgehoertderstaat.de Original-code-by: Guido Aulisi guido.aulisi@gmail.com Tested-by: Dr Nicholas J Bailey nicholas.bailey@glasgow.ac.uk Signed-off-by: Daniel Mack zonque@gmail.com
Why this fixes the issue at all? There is no explanation in the thread.
If any, the sanity check there is simply bogus for ehci, and it'd be better to get rid of it completely.
thanks,
Takashi
sound/usb/usx2y/usbusx2yaudio.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sound/usb/usx2y/usbusx2yaudio.c b/sound/usb/usx2y/usbusx2yaudio.c index 63fb521..cd16fcc 100644 --- a/sound/usb/usx2y/usbusx2yaudio.c +++ b/sound/usb/usx2y/usbusx2yaudio.c @@ -328,7 +328,7 @@ static void i_usX2Y_urb_complete(struct urb *urb) usX2Y_error_urb_status(usX2Y, subs, urb); return; }
- if (likely((urb->start_frame & 0xFFFF) == (usX2Y->wait_iso_frame & 0xFFFF)))
- if (likely((urb->start_frame & 0x03FF) == (usX2Y->wait_iso_frame & 0x03FF))) subs->completed_urb = urb; else { usX2Y_error_sequence(usX2Y, subs, urb);
-- 1.8.3.1
On 02.10.2013 15:48, Takashi Iwai wrote:
At Wed, 2 Oct 2013 15:39:57 +0200, Daniel Mack wrote:
This patch is based on a change proposed by Guido Aulisi in a discussion on LAU which can be followed here:
http://linuxaudio.org/mailarchive/lau/2013/5/20/200177
Cc: fzu@wemgehoertderstaat.de Original-code-by: Guido Aulisi guido.aulisi@gmail.com Tested-by: Dr Nicholas J Bailey nicholas.bailey@glasgow.ac.uk Signed-off-by: Daniel Mack zonque@gmail.com
Why this fixes the issue at all? There is no explanation in the thread.
I have no idea of this driver.
If any, the sanity check there is simply bogus for ehci, and it'd be better to get rid of it completely.
You're right. I guess, however, that there was a reason to add the code in the first place.
Anyway, I'll send another patch that does the removal.
Thanks, Daniel
Hi, I saw this thread only today. if I remember well, that patch worked because the check wrapped around 03ff, but in the end I removed that check totally. I haven't used my Tascam US122 since may 2013, because I work with an RME Raydat in my studio and I used the Tascam only for live recording. If you want, I can do some other testing on my US122. Ciao Guido Aulisi
2013/10/2 Daniel Mack zonque@gmail.com:
On 02.10.2013 15:48, Takashi Iwai wrote:
At Wed, 2 Oct 2013 15:39:57 +0200, Daniel Mack wrote:
This patch is based on a change proposed by Guido Aulisi in a discussion on LAU which can be followed here:
http://linuxaudio.org/mailarchive/lau/2013/5/20/200177
Cc: fzu@wemgehoertderstaat.de Original-code-by: Guido Aulisi guido.aulisi@gmail.com Tested-by: Dr Nicholas J Bailey nicholas.bailey@glasgow.ac.uk Signed-off-by: Daniel Mack zonque@gmail.com
Why this fixes the issue at all? There is no explanation in the thread.
I have no idea of this driver.
If any, the sanity check there is simply bogus for ehci, and it'd be better to get rid of it completely.
You're right. I guess, however, that there was a reason to add the code in the first place.
Anyway, I'll send another patch that does the removal.
Thanks, Daniel
On 03.10.2013 11:59, Guido Aulisi wrote:
Hi, I saw this thread only today. if I remember well, that patch worked because the check wrapped around 03ff, but in the end I removed that check totally.
That's what the second version of my patch also does.
Next time, when detecting such problems, please consider sending a patch to alsa-devel, so fixes make it to the users eventually :)
Thanks, Daniel
participants (3)
-
Daniel Mack -
Guido Aulisi -
Takashi Iwai