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[media] IR/streamzap: fix usec to nsec conversion 

There is an integer overflow here because 0x03000000 * 1000 is too large
for 31 bits.

rawir.duration should be in terms of nsecs.
IR_MAX_DURATION and 0x03000000 are already in terms of nsecs.
STREAMZAP_TIMEOUT and STREAMZAP_RESOLUTION are 255 and 256 respectively
and are in terms of usecs.

The original code had a deadline of 1.005 seconds and the new code has a
deadline of .065 seconds.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Dan Carpenter 2010-10-12 10:42:08 -03:00 committed by Mauro Carvalho Chehab
parent b768d47eb6
commit b784cfcec7
1 changed files with 2 additions and 2 deletions
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4
drivers/media/IR/streamzap.c
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@ -221,7 +221,7 @@ static void streamzap_callback(struct urb *urb)
struct streamzap_ir *sz;
unsigned int i;
int len;
static int timeout = (((SZ_TIMEOUT * SZ_RESOLUTION) &
static int timeout = (((SZ_TIMEOUT * SZ_RESOLUTION * 1000) &
IR_MAX_DURATION) | 0x03000000);
if (!urb)
@ -273,7 +273,7 @@ static void streamzap_callback(struct urb *urb)
struct ir_raw_event rawir;
rawir.pulse = false;
rawir.duration = timeout * 1000;
rawir.duration = timeout;
sz->idle = true;
if (sz->timeout_enabled)
sz_push(sz, rawir);