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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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mt76x2/pci.c
+5 -2
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@@ -152,12 +152,15 @@ mt76x2e_resume(struct pci_dev *pdev)
mt76_worker_enable(&mdev->tx_worker);
local_bh_disable();
mt76_for_each_q_rx(mdev, i) {
napi_enable(&mdev->napi[i]);
napi_schedule(&mdev->napi[i]);
}
napi_enable(&mdev->tx_napi);
local_bh_disable();
mt76_for_each_q_rx(mdev, i) {
napi_schedule(&mdev->napi[i]);
}
napi_schedule(&mdev->tx_napi);
local_bh_enable();