With logging enabled, it has been observed that the driver spews messages such as: wlcore: ERROR Calculate of clear addr Clear = 204025b0, write = 204015b0 The problem occurs because 204025b0 is the end of the buffer, and 204015b0 is the beginning, and the calculation for "clear"ing the buffer does not take into account that if we read to the very end of the ring buffer, we are actually at the beginning of the buffer. Fix this. Signed-off-by: Russell King <rmk+kernel@xxxxxxxxxxxxxxx> --- drivers/net/wireless/ti/wlcore/event.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/wireless/ti/wlcore/event.c b/drivers/net/wireless/ti/wlcore/event.c index 875198fb1480..8a67a708c96e 100644 --- a/drivers/net/wireless/ti/wlcore/event.c +++ b/drivers/net/wireless/ti/wlcore/event.c @@ -84,6 +84,8 @@ int wlcore_event_fw_logger(struct wl1271 *wl) len = min(actual_len, available_len); wl12xx_copy_fwlog(wl, &buffer[start_loc], len); clear_ptr = addr_ptr + start_loc + actual_len; + if (clear_ptr == buff_end_ptr) + clear_ptr = buff_start_ptr; /* Copy any remaining part from beginning of ring buffer */ len = actual_len - len; -- 2.20.1
