Hi,
Please, ignore this. I should have used ULL instead of UL.
I'll send v2 shortly.
Thanks
--
Gustavo
On 07/03/2018 06:51 PM, Gustavo A. R. Silva wrote:
> Add suffix UL to constant 1000 in order to give the compiler complete
> information about the proper arithmetic to use.
>
> Notice that such constant is used in a context that expects an
> expression of type u64 (64 bits, unsigned) and the following
> expression is currently being evaluated using 32-bit arithmetic:
>
> mode->clock * 1000
>
> Addresses-Coverity-ID: 1466139 ("Unintentional integer overflow")
> Signed-off-by: Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/pl111/pl111_display.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/pl111/pl111_display.c b/drivers/gpu/drm/pl111/pl111_display.c
> index a432eb7..61d51b4 100644
> --- a/drivers/gpu/drm/pl111/pl111_display.c
> +++ b/drivers/gpu/drm/pl111/pl111_display.c
> @@ -63,7 +63,7 @@ pl111_mode_valid(struct drm_crtc *crtc,
> * We use the pixelclock to also account for interlaced modes, the
> * resulting bandwidth is in bytes per second.
> */
> - bw = mode->clock * 1000; /* In Hz */
> + bw = mode->clock * 1000UL; /* In Hz */
> bw = bw * mode->hdisplay * mode->vdisplay * cpp;
> bw = div_u64(bw, mode->htotal * mode->vtotal);
>
>
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