FAILED: patch "[PATCH] ath10k: fix DMA related firmware crashes on multiple devices" failed to apply to 4.2-stable tree

FAILED: patch "[PATCH] ath10k: fix DMA related firmware crashes on multiple devices" failed to apply to 4.2-stable tree

[gregkh]

The patch below does not apply to the 4.2-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

>From 76d164f582150fd0259ec0fcbc485470bcd8033e Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Thu, 17 Sep 2015 14:29:07 +0300
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>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

diff --git a/drivers/net/wireless/ath/ath10k/hw.h b/drivers/net/wireless/ath/ath10k/hw.h
index 23afcda2de96..678d72af4a9d 100644
--- a/drivers/net/wireless/ath/ath10k/hw.h
+++ b/drivers/net/wireless/ath/ath10k/hw.h
@@ -337,7 +337,7 @@ enum ath10k_hw_rate_cck {
 #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			4
@@ -391,7 +391,7 @@ enum ath10k_hw_rate_cck {
 
 #define TARGET_10_4_TX_DBG_LOG_SIZE		1024
 #define TARGET_10_4_NUM_WDS_ENTRIES		32
-#define TARGET_10_4_DMA_BURST_SIZE		1
+#define TARGET_10_4_DMA_BURST_SIZE		0
 #define TARGET_10_4_MAC_AGGR_DELIM		0
 #define TARGET_10_4_RX_SKIP_DEFRAG_TIMEOUT_DUP_DETECTION_CHECK 1
 #define TARGET_10_4_VOW_CONFIG			0

Re: FAILED: patch "[PATCH] ath10k: fix DMA related firmware crashes on multiple devices" failed to apply to 4.2-stable tree

[Kalle Valo]

Hi,

any volunteers to port this patch to 4.2? Should be simple to do but
important.

Kalle

<gregkh@linuxfoundation.org> writes:

> The patch below does not apply to the 4.2-stable tree.
> If someone wants it applied there, or to any other stable or longterm
> tree, then please email the backport, including the original git commit
> id to <stable@vger.kernel.org>.
>
> thanks,
>
> greg k-h
>
> ------------------ original commit in Linus's tree ------------------
>
> From 76d164f582150fd0259ec0fcbc485470bcd8033e Mon Sep 17 00:00:00 2001
> From: Felix Fietkau <nbd@openwrt.org>
> Date: Thu, 17 Sep 2015 14:29:07 +0300
> 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>
> Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
>
> diff --git a/drivers/net/wireless/ath/ath10k/hw.h b/drivers/net/wireless/ath/ath10k/hw.h
> index 23afcda2de96..678d72af4a9d 100644
> --- a/drivers/net/wireless/ath/ath10k/hw.h
> +++ b/drivers/net/wireless/ath/ath10k/hw.h
> @@ -337,7 +337,7 @@ enum ath10k_hw_rate_cck {
>  #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			4
> @@ -391,7 +391,7 @@ enum ath10k_hw_rate_cck {
>  
>  #define TARGET_10_4_TX_DBG_LOG_SIZE		1024
>  #define TARGET_10_4_NUM_WDS_ENTRIES		32
> -#define TARGET_10_4_DMA_BURST_SIZE		1
> +#define TARGET_10_4_DMA_BURST_SIZE		0
>  #define TARGET_10_4_MAC_AGGR_DELIM		0
>  #define TARGET_10_4_RX_SKIP_DEFRAG_TIMEOUT_DUP_DETECTION_CHECK 1
>  #define TARGET_10_4_VOW_CONFIG			0
>

-- 
Kalle Valo

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