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ALSA: us122l: Fix signedness in comparisions

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Within 2.6.30's mergewindow, struct urb's transfer_buffer_length has become
unsigned. This changed an "int > int" comparision to an "unsigned > int" one
in snd_usb_122l.
Fix this by using a local int variable instead of urb->transfer_buffer_length
in comparisions.

Shorten playback_prep_freqn() a bit and tweak error-paths in
usb_stream_prepare_playback().

Signed-off-by: Karsten Wiese <fzu@wemgehoertderstaat.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Karsten Wiese 2009-04-16 19:35:01 +02:00 committed by Takashi Iwai
parent 0882e8dd3a
commit f600f6c482
1 changed files with 29 additions and 36 deletions
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61
sound/usb/usx2y/usb_stream.c
View file

@ -33,32 +33,26 @@ static unsigned usb_stream_next_packet_size(struct usb_stream_kernel *sk)
static void playback_prep_freqn(struct usb_stream_kernel *sk, struct urb *urb)
{
struct usb_stream *s = sk->s;
unsigned l = 0;
int pack;
int pack, lb = 0;
urb->iso_frame_desc[0].offset = 0;
urb->iso_frame_desc[0].length = usb_stream_next_packet_size(sk);
sk->out_phase = sk->out_phase_peeked;
urb->transfer_buffer_length = urb->iso_frame_desc[0].length;
for (pack = 1; pack < sk->n_o_ps; pack++) {
l = usb_stream_next_packet_size(sk);
if (s->idle_outsize + urb->transfer_buffer_length + l >
s->period_size)
for (pack = 0; pack < sk->n_o_ps; pack++) {
int l = usb_stream_next_packet_size(sk);
if (s->idle_outsize + lb + l > s->period_size)
goto check;
sk->out_phase = sk->out_phase_peeked;
urb->iso_frame_desc[pack].offset = urb->transfer_buffer_length;
urb->iso_frame_desc[pack].offset = lb;
urb->iso_frame_desc[pack].length = l;
urb->transfer_buffer_length += l;
lb += l;
}
snd_printdd(KERN_DEBUG "%i\n", urb->transfer_buffer_length);
snd_printdd(KERN_DEBUG "%i\n", lb);
check:
urb->number_of_packets = pack;
s->idle_outsize += urb->transfer_buffer_length - s->period_size;
urb->transfer_buffer_length = lb;
s->idle_outsize += lb - s->period_size;
snd_printdd(KERN_DEBUG "idle=%i ul=%i ps=%i\n", s->idle_outsize,
urb->transfer_buffer_length, s->period_size);
lb, s->period_size);
}
static void init_pipe_urbs(struct usb_stream_kernel *sk, unsigned use_packsize,
@ -282,21 +276,20 @@ static int usb_stream_prepare_playback(struct usb_stream_kernel *sk,
struct usb_stream *s = sk->s;
struct urb *io;
struct usb_iso_packet_descriptor *id, *od;
int p, l = 0;
int p = 0, lb = 0, l = 0;
io = sk->idle_outurb;
od = io->iso_frame_desc;
io->transfer_buffer_length = 0;
for (p = 0; s->sync_packet < 0; ++p, ++s->sync_packet) {
for (; s->sync_packet < 0; ++p, ++s->sync_packet) {
struct urb *ii = sk->completed_inurb;
id = ii->iso_frame_desc +
ii->number_of_packets + s->sync_packet;
l = id->actual_length;
od[p].length = l;
od[p].offset = io->transfer_buffer_length;
io->transfer_buffer_length += l;
od[p].offset = lb;
lb += l;
}
for (;
@ -304,39 +297,39 @@ static int usb_stream_prepare_playback(struct usb_stream_kernel *sk,
++p, ++s->sync_packet) {
l = inurb->iso_frame_desc[s->sync_packet].actual_length;
if (s->idle_outsize + io->transfer_buffer_length + l >
s->period_size)
if (s->idle_outsize + lb + l > s->period_size)
goto check_ok;
od[p].length = l;
od[p].offset = io->transfer_buffer_length;
io->transfer_buffer_length += l;
od[p].offset = lb;
lb += l;
}
check_ok:
s->sync_packet -= inurb->number_of_packets;
if (s->sync_packet < -2 || s->sync_packet > 0) {
if (unlikely(s->sync_packet < -2 || s->sync_packet > 0)) {
snd_printk(KERN_WARNING "invalid sync_packet = %i;"
" p=%i nop=%i %i %x %x %x > %x\n",
s->sync_packet, p, inurb->number_of_packets,
s->idle_outsize + io->transfer_buffer_length + l,
s->idle_outsize, io->transfer_buffer_length, l,
s->idle_outsize + lb + l,
s->idle_outsize, lb, l,
s->period_size);
return -1;
}
if (io->transfer_buffer_length % s->cfg.frame_size) {
if (unlikely(lb % s->cfg.frame_size)) {
snd_printk(KERN_WARNING"invalid outsize = %i\n",
io->transfer_buffer_length);
lb);
return -1;
}
s->idle_outsize += io->transfer_buffer_length - s->period_size;
s->idle_outsize += lb - s->period_size;
io->number_of_packets = p;
if (s->idle_outsize > 0) {
io->transfer_buffer_length = lb;
if (s->idle_outsize <= 0)
return 0;
snd_printk(KERN_WARNING "idle=%i\n", s->idle_outsize);
return -1;
}
return 0;
}
static void prepare_inurb(int number_of_packets, struct urb *iu)
{