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net: ibm: emac: mal: fix NAPI locking

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Since commit 413f0271f3 ("net: protect NAPI enablement with
netdev_lock()"), napi_enable() and napi_disable() take netdev_lock().

mal_register_commac() and mal_unregister_commac() call these helpers
while holding mal->lock with interrupts disabled. In the unregister
path, napi_disable() may also wait for polling to finish, while the poll
completion path takes mal->lock.

Take netdev_lock() before mal->lock, use the locked NAPI helpers, and
drop mal->lock before napi_disable_locked().

Fixes: 413f0271f3 ("net: protect NAPI enablement with netdev_lock()")
Cc: stable@vger.kernel.org
Signed-off-by: Runyu Xiao <runyu.xiao@seu.edu.cn>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20260811070813.377573-1-runyu.xiao@seu.edu.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Runyu Xiao 2026-08-11 15:08:13 +08:00 • committed by Jakub Kicinski
commit 43b0213529
1 changed files with 10 additions and 3 deletions
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