[PATCH 2/3] drm/sti: do not set gdp pixel clock rate if mode is not set

Fix a division by 0 case : in some cases, when the GDP plane is being disabled atomic_check() is called with "mode->clock = 0". In that case, do not set parent and pixel clock rate.

Signed-off-by: Vincent Abriou vincent.abriou@st.com --- drivers/gpu/drm/sti/sti_gdp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/sti/sti_gdp.c b/drivers/gpu/drm/sti/sti_gdp.c index 7255234..7f6d079 100644 --- a/drivers/gpu/drm/sti/sti_gdp.c +++ b/drivers/gpu/drm/sti/sti_gdp.c @@ -648,7 +648,7 @@ static int sti_gdp_atomic_check(struct drm_plane *drm_plane, }

/* Set gdp clock */ - if (gdp->clk_pix) { + if (mode->clock && gdp->clk_pix) { struct clk *clkp; int rate = mode->clock * 1000; int res;