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| author | Felix Fietkau <nbd@nbd.name> | 2018-02-10 13:26:42 +0100 |
|---|---|---|
| committer | Felix Fietkau <nbd@nbd.name> | 2018-02-21 19:28:36 +0100 |
| commit | 526921f20e9d40967d38b09c67d3247f4c6ddb39 (patch) | |
| tree | c378d758599192448790b184d4979e97fed510c0 /package/kernel | |
| parent | 8a59f9590e0b79f5ec6620a9e8534224e96db9a4 (diff) | |
| download | upstream-526921f20e9d40967d38b09c67d3247f4c6ddb39.tar.gz upstream-526921f20e9d40967d38b09c67d3247f4c6ddb39.tar.bz2 upstream-526921f20e9d40967d38b09c67d3247f4c6ddb39.zip | |
mac80211: round up tx status headroom
Fixes unaligned access exceptions in mt76 when transmitting beacons
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Diffstat (limited to 'package/kernel')
| -rw-r--r-- | package/kernel/mac80211/patches/325-mac80211-round-IEEE80211_TX_STATUS_HEADROOM-up-to-mu.patch | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/325-mac80211-round-IEEE80211_TX_STATUS_HEADROOM-up-to-mu.patch b/package/kernel/mac80211/patches/325-mac80211-round-IEEE80211_TX_STATUS_HEADROOM-up-to-mu.patch new file mode 100644 index 0000000000..56c0acc099 --- /dev/null +++ b/package/kernel/mac80211/patches/325-mac80211-round-IEEE80211_TX_STATUS_HEADROOM-up-to-mu.patch @@ -0,0 +1,26 @@ +From: Felix Fietkau <nbd@nbd.name> +Date: Fri, 9 Feb 2018 19:46:54 +0100 +Subject: [PATCH] mac80211: round IEEE80211_TX_STATUS_HEADROOM up to multiple + of 4 + +This ensures that mac80211 allocated management frames are properly +aligned, which makes copying them more efficient. +For instance, mt76 uses iowrite32_copy to copy beacon frames to beacon +template memory on the chip. +Misaligned 32-bit accesses cause CPU exceptions on MIPS and should be +avoided. + +Signed-off-by: Felix Fietkau <nbd@nbd.name> +--- + +--- a/include/net/mac80211.h ++++ b/include/net/mac80211.h +@@ -4149,7 +4149,7 @@ void ieee80211_sta_uapsd_trigger(struct + * The TX headroom reserved by mac80211 for its own tx_status functions. + * This is enough for the radiotap header. + */ +-#define IEEE80211_TX_STATUS_HEADROOM 14 ++#define IEEE80211_TX_STATUS_HEADROOM ALIGN(14, 4) + + /** + * ieee80211_sta_set_buffered - inform mac80211 about driver-buffered frames |