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ALSA: usb-audio: Evaluate packsize caps at the right place

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commit 52521e8398 upstream.

We introduced the upper bound checks of the packet sizes by the
ep->maxframesize for avoiding the URB submission errors.  However, the
check was applied at an incorrect place in the function
snd_usb_endpoint_set_params() where ep->maxframesize isn't defined
yet; the value is defined at a bit later position.  So this ended up
with a failure at the first run while the second run works.

For fixing it, move the check at the correct place, right after the
calculation of ep->maxframesize in the same function.

Fixes: 7fe8dec3f6 ("ALSA: usb-audio: Cap the packet size pre-calculations")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=221292
Cc: <stable@vger.kernel.org>
Link: https://patch.msgid.link/20260410143220.1676344-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Takashi Iwai
2026-05-17 17:13:25 +02:00
committed by Greg Kroah-Hartman
parent e3a0ebd80a
commit 8775fa6e29
1 changed files with 3 additions and 3 deletions
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sound/usb/endpoint.c
+3 -3
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@@ -1397,9 +1397,6 @@ int snd_usb_endpoint_set_params(struct snd_usb_audio *chip,
goto unlock;
}
ep->packsize[0] = min(ep->packsize[0], ep->maxframesize);
ep->packsize[1] = min(ep->packsize[1], ep->maxframesize);
/* calculate the frequency in 16.16 format */
ep->freqm = ep->freqn;
ep->freqshift = INT_MIN;
@@ -1426,6 +1423,9 @@ int snd_usb_endpoint_set_params(struct snd_usb_audio *chip,
ep->maxframesize = ep->maxpacksize / ep->cur_frame_bytes;
ep->curframesize = ep->curpacksize / ep->cur_frame_bytes;
ep->packsize[0] = min(ep->packsize[0], ep->maxframesize);
ep->packsize[1] = min(ep->packsize[1], ep->maxframesize);
err = update_clock_ref_rate(chip, ep);
if (err >= 0) {
ep->need_setup = false;