Commit 9e7d1a44 authored Jan 24, 2008 by Eric Sandeen Committed by David S. Miller Jan 31, 2008

iwlwifi: correct math in elapsed_jiffies



w/o the first change: if end == start you get MAX_JIFFY_OFFSET which
isn't what you want...

For the latter I think to be technically correct you need the +1 to
account for the jiffy between MAX_JIFFY_OFFSET and 0

(hmm w/ the 2nd change the first isn't strictly needed... ah well)

Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 303d9bf6

drivers/net/wireless/iwlwifi/iwl-helpers.h

+2 −2

Original line number	Diff line number	Diff line
		@@ -246,10 +246,10 @@ static inline int iwl_check_bits(unsigned long field, unsigned long mask)
		static inline unsigned long elapsed_jiffies(unsigned long start,
		unsigned long end)
		{
		if (end > start)
		if (end >= start)
		return end - start;

		return end + (MAX_JIFFY_OFFSET - start);
		return end + (MAX_JIFFY_OFFSET - start) + 1;
		}

		static inline u8 iwl_get_dma_hi_address(dma_addr_t addr)