dpaa2-switch: Fix interrupt storm after receiving bad if_id in IRQ handler

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[ Upstream commit 74badb9c20 ]

Commit 31a7a0bbeb ("dpaa2-switch: add bounds check for if_id in IRQ
handler") introduces a range check for if_id to avoid an out-of-bounds
access. If an out-of-bounds if_id is detected, the interrupt status is
not cleared. This may result in an interrupt storm.

Clear the interrupt status after detecting an out-of-bounds if_id to avoid
the problem.

Found by an experimental AI code review agent at Google.

Fixes: 31a7a0bbeb ("dpaa2-switch: add bounds check for if_id in IRQ handler")
Cc: Junrui Luo <moonafterrain@outlook.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Link: https://patch.msgid.link/20260227055812.1777915-1-linux@roeck-us.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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This commit is contained in:

Guenter Roeck 2026-02-26 21:58:12 -08:00 • committed by Sasha Levin

parent 6a674e0b19

commit 00f42ace44

1 changed files with 2 additions and 1 deletions

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drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c

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