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Date:   Tue, 27 Oct 2020 20:19:30 +0100
From:   Daniel Vetter <daniel@ffwll.ch>
To:     Bartosz Golaszewski <brgl@bgdev.pl>
Cc:     Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
        Sumit Semwal <sumit.semwal@linaro.org>,
        Gustavo Padovan <gustavo@padovan.org>,
        Christian =?iso-8859-1?Q?K=F6nig?= <christian.koenig@amd.com>,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
        Borislav Petkov <bp@alien8.de>,
        Tony Luck <tony.luck@intel.com>,
        James Morse <james.morse@arm.com>,
        Robert Richter <rric@kernel.org>,
        Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        Maxime Ripard <mripard@kernel.org>,
        Thomas Zimmermann <tzimmermann@suse.de>,
        David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Linus Walleij <linus.walleij@linaro.org>,
        "Michael S . Tsirkin" <mst@redhat.com>,
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        Christoph Lameter <cl@linux.com>,
        Pekka Enberg <penberg@kernel.org>,
        David Rientjes <rientjes@google.com>,
        Joonsoo Kim <iamjoonsoo.kim@lge.com>,
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        Bartosz Golaszewski <bgolaszewski@baylibre.com>
Subject: Re: [PATCH 6/8] drm: atomic: use krealloc_array()
Message-ID: <20201027191930.GQ401619@phenom.ffwll.local>
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        Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        Maxime Ripard <mripard@kernel.org>,
        Thomas Zimmermann <tzimmermann@suse.de>,
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        Linus Walleij <linus.walleij@linaro.org>,
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        Joonsoo Kim <iamjoonsoo.kim@lge.com>,
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References: <20201027121725.24660-1-brgl@bgdev.pl>
 <20201027121725.24660-7-brgl@bgdev.pl>
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On Tue, Oct 27, 2020 at 01:17:23PM +0100, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
> 
> Use the helper that checks for overflows internally instead of manually
> calculating the size of the new array.
> 
> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>

Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>

I don't expect conflicts with this going through some other tree, so
please make that happen. Or resend once I can apply this to drm trees.

Thanks, Daniel

> ---
>  drivers/gpu/drm/drm_atomic.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
> index 58527f151984..09ad6a2ec17b 100644
> --- a/drivers/gpu/drm/drm_atomic.c
> +++ b/drivers/gpu/drm/drm_atomic.c
> @@ -960,7 +960,8 @@ drm_atomic_get_connector_state(struct drm_atomic_state *state,
>  		struct __drm_connnectors_state *c;
>  		int alloc = max(index + 1, config->num_connector);
>  
> -		c = krealloc(state->connectors, alloc * sizeof(*state->connectors), GFP_KERNEL);
> +		c = krealloc_array(state->connectors, alloc,
> +				   sizeof(*state->connectors), GFP_KERNEL);
>  		if (!c)
>  			return ERR_PTR(-ENOMEM);
>  
> -- 
> 2.29.1
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch