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| author | Jarod Wilson <jarod@redhat.com> | 2010-11-09 18:41:46 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-12-20 14:11:08 -0200 |
| commit | 29b4494b1ff0157c1816ce8e2aea2abfdeb7f763 (patch) | |
| tree | 287388322ddb0c05accb6faf1e9959110f3a29d4 /drivers/media/IR/mceusb.c | |
| parent | 1cd50f25614226e99ac7a1518311e8474ea024e3 (diff) | |
| download | lwn-29b4494b1ff0157c1816ce8e2aea2abfdeb7f763.tar.gz lwn-29b4494b1ff0157c1816ce8e2aea2abfdeb7f763.zip | |
[media] mceusb: buffer parsing fixups for 1st-gen device
If we pass in an offset, we shouldn't skip 2 bytes. And the first-gen
hardware generates a constant stream of interrupts, always with two
header bytes, and if there's been no IR, with nothing else. Bail from
ir processing without calling ir_handle_raw_event when we get such a
buffer delivered to us.
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/IR/mceusb.c')
| -rw-r--r-- | drivers/media/IR/mceusb.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/media/IR/mceusb.c b/drivers/media/IR/mceusb.c index 18110987597e..ed151c8290fe 100644 --- a/drivers/media/IR/mceusb.c +++ b/drivers/media/IR/mceusb.c @@ -446,7 +446,7 @@ static void mceusb_dev_printdata(struct mceusb_dev *ir, char *buf, return; /* skip meaningless 0xb1 0x60 header bytes on orig receiver */ - if (ir->flags.microsoft_gen1 && !out) + if (ir->flags.microsoft_gen1 && !out && !offset) skip = 2; if (len <= skip) @@ -807,6 +807,10 @@ static void mceusb_process_ir_data(struct mceusb_dev *ir, int buf_len) if (ir->flags.microsoft_gen1) i = 2; + /* if there's no data, just return now */ + if (buf_len <= i) + return; + for (; i < buf_len; i++) { switch (ir->parser_state) { case SUBCMD: |