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Commit bdf91cfa authored by Arik Nemtsov's avatar Arik Nemtsov Committed by Luciano Coelho
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wl12xx: handle wrap-around overflow in released Tx blocks FW counter 



When the FW Tx released blocks counter wraps around, we should correct
our calculation of released blocks. Otherwise we add a large negative
figure to our driver freed blocks counter

Signed-off-by: default avatarArik Nemtsov <arik@wizery.com>
Signed-off-by: default avatarEliad Peller <eliad@wizery.com>
Signed-off-by: default avatarLuciano Coelho <coelho@ti.com>
parent 742246f8

drivers/net/wireless/wl12xx/main.c

+9 −2
Original line number Diff line number Diff line
@@ -834,8 +834,15 @@ static void wl12xx_fw_status(struct wl1271 *wl, 
		wl->tx_pkts_freed[i] = status->tx_released_pkts[i];

	}



	/* prevent wrap-around in total blocks counter */

	if (likely(wl->tx_blocks_freed <=

		   le32_to_cpu(status->total_released_blks)))

		freed_blocks = le32_to_cpu(status->total_released_blks) -

			       wl->tx_blocks_freed;

	else

		freed_blocks = 0x100000000LL - wl->tx_blocks_freed +

			       le32_to_cpu(status->total_released_blks);



	wl->tx_blocks_freed = le32_to_cpu(status->total_released_blks);



	wl->tx_allocated_blocks -= freed_blocks;