tree a479bb12e9d290e8f14da3402ad48fcabf9cf6d0
parent 4364bcb2cd21d042bde4776448417ddffbc54045
author Boris Brezillon <boris.brezillon@bootlin.com> 1539856970 +0200
committer Maxime Ripard <maxime.ripard@bootlin.com> 1539942625 +0200
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drm/sun4i: Fix an ulong overflow in the dotclock driver

The calculated ideal rate can easily overflow an unsigned long, thus
making the best div selection buggy as soon as no ideal match is found
before the overflow occurs.

Fixes: 4731a72df273 ("drm/sun4i: request exact rates to our parents")
Cc: <stable@vger.kernel.org>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181018100250.12565-1-boris.brezillon@bootlin.com