From b784cfcec7293f688b09d3850826216a4e134d2e Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Tue, 12 Oct 2010 10:42:08 -0300 Subject: [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 Signed-off-by: Jarod Wilson Signed-off-by: Mauro Carvalho Chehab --- drivers/media/IR/streamzap.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/media/IR') diff --git a/drivers/media/IR/streamzap.c b/drivers/media/IR/streamzap.c index 623ee2dc198e..86a4f68feea4 100644 --- a/drivers/media/IR/streamzap.c +++ b/drivers/media/IR/streamzap.c @@ -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); -- cgit v1.2.2