genirq: Check irq_data_get_irq_chip() return value before use

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irq_data_get_irq_chip() can return NULL, however it is expected that this
never happens. If a buggy driver leads to NULL being returned from
irq_data_get_irq_chip(), warn about it instead of crashing the machine.

Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

To: linux-arm-kernel@lists.infradead.org

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Marek Vasut 2020-05-14 02:25:55 +02:00 • committed by Thomas Gleixner

parent 9cb1fd0efd

commit 1d0326f352

1 changed files with 4 additions and 0 deletions

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kernel/irq/manage.c

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