Re: [PATCH] qla2xxx: setup data needed in ISR before setting up the ISR

[Himanshu Madhani]

On 7/13/16, 9:28 PM, "Martin K. Petersen" <martin.petersen@xxxxxxxxxx> wrote:

>>>>>> "Johannes" == Johannes Thumshirn <jthumshirn@xxxxxxx> writes:
>
>Johannes> qla2xxx first calls request_irq() and then does the setup of
>Johannes> the queue entry data needed in the interrupt handlers in when
>Johannes> using MSI-X. This could lead to a NULL pointer dereference
>Johannes> when an IRQ fires between the request_irq() call and the
>Johannes> assignment of the qentry data structure to the
>rsp-> msix field. A possible case for such a race would be in the kdump
>Johannes> case when the HBA's IRQs are still enabled but the driver is
>Johannes> undergoing a new initialisation and thus is not aware of
>Johannes> already activated IRQs in the HBA.
>
>Qlogic folks: Please review!

Looks Good. 

Reviewed-by: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>


>
>-- 
>Martin K. Petersen	Oracle Linux Engineering