linux-kernel - Re: [PATCH v2] tpm/tpm_tis: Free IRQ if probing fails

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Message-ID: <2692261d-5395-b03c-2a6f-1694212cd2d4@redhat.com>
Date:   Tue, 21 Apr 2020 22:25:42 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Cc:     linux-integrity@...r.kernel.org, stable@...r.kernel.org,
        Peter Huewe <peterhuewe@....de>,
        Jason Gunthorpe <jgg@...pe.ca>, Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] tpm/tpm_tis: Free IRQ if probing fails

Hi,

On 4/21/20 9:54 PM, Jarkko Sakkinen wrote:
> On Tue, Apr 21, 2020 at 03:23:19PM +0200, Hans de Goede wrote:
>> Hi,
>>
>> On 4/16/20 6:07 PM, Jarkko Sakkinen wrote:
>>> Call disable_interrupts() if we have to revert to polling in order not to
>>> unnecessarily reserve the IRQ for the life-cycle of the driver.
>>>
>>> Cc: stable@...r.kernel.org # 4.5.x
>>> Reported-by: Hans de Goede <hdegoede@...hat.com>
>>> Fixes: e3837e74a06d ("tpm_tis: Refactor the interrupt setup")
>>> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
>>
>> I can confirm that this fixes the "irq 31 nobody cared" oops for me:
>>
>> Tested-by: Hans de Goede <hdegoede@...hat.com>
> 
> Hi, thanks a lot! Unfortunately I already put this out given the
> criticality of the issue:
> 
> https://lkml.org/lkml/2020/4/20/1544
> 
> Sincere apologies that I couldn't include your tested-by

No problem.

> but the most
> important thing is to know that it works now.

Agreed.

Regards,

Hans