ath6kl: read fwlog from firmware ring buffer

Firmare sends the logs only when it's internal ring buffer is full. But
if firmware crashes we need to retrieve the latest logs through diagnose
window. This is now done everytime the debugfs file is read.

Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/ath6kl/debug.c

@@ -247,6 +247,9 @@ static ssize_t ath6kl_fwlog_read(struct file *file, char __user *user_buf,
 	if (!buf)
 		return -ENOMEM;
 
+	/* read undelivered logs from firmware */
+	ath6kl_read_fwlogs(ar);
+
 	spin_lock_bh(&ar->debug.fwlog_lock);
 
 	while (len < buf_len && !ath6kl_debug_fwlog_empty(ar)) {