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From: Greg KH <gregkh@linuxfoundation.org>
To: John Garry <john.garry@huawei.com>
Cc: rafael@kernel.org, maz@kernel.org, tglx@linutronix.de,
	linux-kernel@vger.kernel.org, dan.carpenter@oracle.com
Subject: Re: [PATCH] Driver core: platform: Add extra error check in devm_platform_get_irqs_affinity()
Date: Fri, 8 Jan 2021 16:43:59 +0100	[thread overview]
Message-ID: <X/h9vy/1h0E1hyN0@kroah.com> (raw)
In-Reply-To: <1608561055-231244-1-git-send-email-john.garry@huawei.com>

On Mon, Dec 21, 2020 at 10:30:55PM +0800, John Garry wrote:
> The current check of nvec < minvec for nvec returned from
> platform_irq_count() will not detect a negative error code in nvec.
> 
> This is because minvec is unsigned, and, as such, nvec is promoted to
> unsigned in that check, which will make it a huge number (if it contained
> -EPROBE_DEFER).
> 
> In practice, an error should not occur in nvec for the only in-tree
> user, but add a check anyway.
> 
> Fixes: e15f2fa959f2 ("driver core: platform: Add devm_platform_get_irqs_affinity()")
> Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
> Signed-off-by: John Garry <john.garry@huawei.com>
> ---
> I hope that this can go through either irqchip or driver/core trees, thanks!

I'll take it, thanks.

greg k-h

  parent reply	other threads:[~2021-01-08 15:43 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-21 14:30 John Garry
2020-12-22  8:12 ` [irqchip: irq/irqchip-next] driver " irqchip-bot for John Garry
2021-01-08 15:43 ` Greg KH [this message]
2021-01-08 15:43   ` [PATCH] Driver " John Garry
2021-01-08 15:48     ` Marc Zyngier
2021-01-08 16:06       ` Greg KH

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