Thread (2 messages) 2 messages, 2 authors, 2017-12-19

[PATCH V4] ACPI / GED: unregister interrupts during shutdown

From: rafael@kernel.org (Rafael J. Wysocki)
Date: 2017-12-19 01:42:55
Also in: linux-acpi, linux-arm-msm, lkml

On Wed, Dec 13, 2017 at 1:37 AM, Sinan Kaya [off-list ref] wrote:
Some GED interrupts could be pending by the time we are doing a reboot.

Even though GED driver uses devm_request_irq() to register the interrupt
handler, the handler is not being freed on time during a shutdown since
the driver is missing a shutdown callback.

If the ACPI handler is no longer available, this causes an interrupt
storm and delays shutdown.

1. Don't use devm family of functions for IRQ registration/free
2. Keep track of the events since free_irq() requires the dev_id parameter
passed into the request_irq() function.
3. Call free_irq() on both remove and shutdown explicitly.

Signed-off-by: Sinan Kaya <redacted>
Applied, thanks!
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