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-rw-r--r--package/kernel/mac80211/patches/ath/922-ath10k-increase-rx-buffer-size-to-2048.patch37
1 files changed, 37 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/ath/922-ath10k-increase-rx-buffer-size-to-2048.patch b/package/kernel/mac80211/patches/ath/922-ath10k-increase-rx-buffer-size-to-2048.patch
new file mode 100644
index 0000000000..f7c842f428
--- /dev/null
+++ b/package/kernel/mac80211/patches/ath/922-ath10k-increase-rx-buffer-size-to-2048.patch
@@ -0,0 +1,37 @@
+From: Linus Lüssing <ll@simonwunderlich.de>
+Date: Wed, 5 Feb 2020 20:10:43 +0100
+Subject: ath10k: increase rx buffer size to 2048
+
+Before, only frames with a maximum size of 1528 bytes could be
+transmitted between two 802.11s nodes.
+
+For batman-adv for instance, which adds its own header to each frame,
+we typically need an MTU of at least 1532 bytes to be able to transmit
+without fragmentation.
+
+This patch now increases the maxmimum frame size from 1528 to 1656
+bytes.
+
+Tested with two ath10k devices in 802.11s mode, as well as with
+batman-adv on top of 802.11s with forwarding disabled.
+
+Fix originally found and developed by Ben Greear.
+
+Link: https://github.com/greearb/ath10k-ct/issues/89
+Link: https://github.com/greearb/ath10k-ct/commit/9e5ab25027e0971fa24ccf93373324c08c4e992d
+Cc: Ben Greear <greearb@candelatech.com>
+Signed-off-by: Linus Lüssing <ll@simonwunderlich.de>
+
+Forwarded: https://patchwork.kernel.org/patch/11367055/
+
+--- a/drivers/net/wireless/ath/ath10k/htt.h
++++ b/drivers/net/wireless/ath/ath10k/htt.h
+@@ -2004,7 +2004,7 @@ struct htt_rx_desc {
+ * Should be: sizeof(struct htt_host_rx_desc) + max rx MSDU size,
+ * rounded up to a cache line size.
+ */
+-#define HTT_RX_BUF_SIZE 1920
++#define HTT_RX_BUF_SIZE 2048
+ #define HTT_RX_MSDU_SIZE (HTT_RX_BUF_SIZE - (int)sizeof(struct htt_rx_desc))
+
+ /* Refill a bunch of RX buffers for each refill round so that FW/HW can handle