From: Felix Fietkau <nbd@openwrt.org>
Date: Sun, 13 Sep 2015 22:26:10 +0200
Subject: [PATCH] ath10k: fix DMA related firmware crashes on multiple devices

Some platforms really don't like DMA bursts of 256 bytes, and this
causes the firmware to crash when sending beacons.
Also, changing this based on the firmware version does not seem to make
much sense, so use 128 bytes for all versions.

Cc: stable@vger.kernel.org
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
---

--- a/drivers/net/wireless/ath/ath10k/hw.h
+++ b/drivers/net/wireless/ath/ath10k/hw.h
@@ -253,7 +253,7 @@ struct ath10k_pktlog_hdr {
 #define TARGET_10X_MAX_FRAG_ENTRIES		0
 
 /* 10.2 parameters */
-#define TARGET_10_2_DMA_BURST_SIZE		1
+#define TARGET_10_2_DMA_BURST_SIZE		0
 
 /* Target specific defines for WMI-TLV firmware */
 #define TARGET_TLV_NUM_VDEVS			3