drm/pl111: Use 64-bit arithmetic instead of 32-bit
Add suffix ULL 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@embeddedor.com> Signed-off-by: Eric Anholt <eric@anholt.net> Link: https://patchwork.freedesktop.org/patch/msgid/20180704142255.GA8614@embeddedor.com
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@ -63,7 +63,7 @@ pl111_mode_valid(struct drm_crtc *crtc,
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* We use the pixelclock to also account for interlaced modes, the
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* resulting bandwidth is in bytes per second.
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*/
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bw = mode->clock * 1000; /* In Hz */
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bw = mode->clock * 1000ULL; /* In Hz */
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bw = bw * mode->hdisplay * mode->vdisplay * cpp;
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bw = div_u64(bw, mode->htotal * mode->vtotal);
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