drm/amd/display: prevent potential division by zero errors

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commit 07e388aab0 upstream.

There are two places in apply_below_the_range() where it's possible for
a divide by zero error to occur. So, to fix this make sure the divisor
is non-zero before attempting the computation in both cases.

Cc: stable@vger.kernel.org
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2637
Fixes: a463b26303 ("drm/amd/display: Fix frames_to_insert math")
Fixes: ded6119e82 ("drm/amd/display: Reinstate LFC optimization")
Reviewed-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Hamza Mahfooz 2023-09-05 13:27:22 -04:00 • committed by Greg Kroah-Hartman

parent e1769b1dfc

commit ff536a9668

1 changed files with 6 additions and 3 deletions

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drivers/gpu/drm/amd/display/modules/freesync/freesync.c

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