diff options
Diffstat (limited to 'drivers/net/wireless/wl12xx')
| -rw-r--r-- | drivers/net/wireless/wl12xx/main.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/net/wireless/wl12xx/main.c b/drivers/net/wireless/wl12xx/main.c index 027b6742a15..0fa3a2281dd 100644 --- a/drivers/net/wireless/wl12xx/main.c +++ b/drivers/net/wireless/wl12xx/main.c @@ -834,8 +834,15 @@ static void wl12xx_fw_status(struct wl1271 *wl, wl->tx_pkts_freed[i] = status->tx_released_pkts[i]; } - freed_blocks = le32_to_cpu(status->total_released_blks) - - wl->tx_blocks_freed; + /* 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; |