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wifi: mt76: move napi_enable() from under BH

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mt76 does a lot of:

  local_bh_disable();
  napi_enable(...napi);
  napi_schedule(...napi);
  local_bh_enable();

local_bh_disable() is not a real lock, its most likely taken
because napi_schedule() requires that we invoke softirqs at
some point. napi_enable() needs to take a mutex, so move it
from under the BH protection.

Fixes: 413f0271f396 ("net: protect NAPI enablement with netdev_lock()")
Reported-by: Dan Carpenter <[email protected]>
Link: https://lore.kernel.org/[email protected]
Reviewed-by: Eric Dumazet <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>
This commit is contained in:
Jakub Kicinski
2025-03-11 11:23:49 +01:00
committed by Felix Fietkau
parent a4be3fc9ed
commit 0ba7a69f89
12 changed files with 69 additions and 36 deletions
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mt7603/mac.c
+4 -5
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@@ -1479,14 +1479,13 @@ static void mt7603_mac_watchdog_reset(struct mt7603_dev *dev)
tasklet_enable(&dev->mt76.pre_tbtt_tasklet);
mt7603_beacon_set_timer(dev, -1, beacon_int);
local_bh_disable();
napi_enable(&dev->mt76.tx_napi);
napi_schedule(&dev->mt76.tx_napi);
napi_enable(&dev->mt76.napi[0]);
napi_schedule(&dev->mt76.napi[0]);
napi_enable(&dev->mt76.napi[1]);
local_bh_disable();
napi_schedule(&dev->mt76.tx_napi);
napi_schedule(&dev->mt76.napi[0]);
napi_schedule(&dev->mt76.napi[1]);
local_bh_enable();