fbdev: lxfb: Fix potential divide by zero
[ Upstream commit 61ac4b86a4c047c20d5cb423ddd87496f14d9868 ] var->pixclock can be assigned to zero by user. Without proper check, divide by zero would occur in lx_set_clock. Error out if var->pixclock is zero. Signed-off-by:Wei Chen <harperchen1110@gmail.com> Signed-off-by:
Helge Deller <deller@gmx.de> Signed-off-by:
Sasha Levin <sashal@kernel.org>
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