Re: [PATCHv4] irqchip: arm-gic: take gic_lock when updating irq type

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Wed, 28 Mar 2018 14:42:00 +0100,
Aniruddha Banerjee wrote:
> 
> From: Aniruddha Banerjee <aniruddhab@xxxxxxxxxx>
> 
> The kernel documentation states that the locking of the irq-chip
> registers should be handled by the irq-chip driver. In the irq-gic,
> the accesses to the irqchip are seemingly not protected and multiple
> writes to SPIs from different irq descriptors do RMW requests without
> taking the irq-chip lock. When multiple irqs call the request_irq at
> the same time, there can be a simultaneous write at the gic
> distributor, leading to a race. Acquire the gic_lock when the
> irq_type is updated.
> 
> Cc: stable@xxxxxxxxxxxxxxx
> 
> Signed-off-by: Aniruddha Banerjee <aniruddhab@xxxxxxxxxx>

I've applied this after having reworked the commit log a bit.

Thanks,

	M.

-- 
Jazz is not dead, it just smell funny.



[Index of Archives]     [Linux Kernel]     [Kernel Development Newbies]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Hiking]     [Linux Kernel]     [Linux SCSI]