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| author | David S. Miller <davem@davemloft.net> | 2013-08-17 02:37:26 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-08-17 02:37:26 +0400 |
| commit | 2ff1cf12c9fe70e75e600404e6a4274b19d293ed (patch) | |
| tree | beafddac0a8098e3f07d2ec60e44a2a7d006e605 /sound/usb/endpoint.c | |
| parent | 16b304f3404f8e0243d5ee2b70b68767b7b59b2b (diff) | |
| parent | 0f7dd1aa8f959216f1faa71513b9d3c1a9065e5a (diff) | |
| download | linux-2ff1cf12c9fe70e75e600404e6a4274b19d293ed.tar.xz | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Diffstat (limited to 'sound/usb/endpoint.c')
| -rw-r--r-- | sound/usb/endpoint.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c index 7a444b5501d9..659950e5b94f 100644 --- a/sound/usb/endpoint.c +++ b/sound/usb/endpoint.c @@ -591,17 +591,16 @@ static int data_ep_set_params(struct snd_usb_endpoint *ep, ep->stride = frame_bits >> 3; ep->silence_value = pcm_format == SNDRV_PCM_FORMAT_U8 ? 0x80 : 0; - /* calculate max. frequency */ - if (ep->maxpacksize) { + /* assume max. frequency is 25% higher than nominal */ + ep->freqmax = ep->freqn + (ep->freqn >> 2); + maxsize = ((ep->freqmax + 0xffff) * (frame_bits >> 3)) + >> (16 - ep->datainterval); + /* but wMaxPacketSize might reduce this */ + if (ep->maxpacksize && ep->maxpacksize < maxsize) { /* whatever fits into a max. size packet */ maxsize = ep->maxpacksize; ep->freqmax = (maxsize / (frame_bits >> 3)) << (16 - ep->datainterval); - } else { - /* no max. packet size: just take 25% higher than nominal */ - ep->freqmax = ep->freqn + (ep->freqn >> 2); - maxsize = ((ep->freqmax + 0xffff) * (frame_bits >> 3)) - >> (16 - ep->datainterval); } if (ep->fill_max) |