Commit 11c09b55 authored by Suraj Kandpal's avatar Suraj Kandpal
Browse files

drm/i915/backlight: Fix divide by 0 error in i9xx_set_backlight 



pwm_level_max maybe 0 we do throw a warning but move ahead with
execution which may later cause a /0 error.

--v2
-return if the warn_on gets hit [Jani]

Signed-off-by: default avatarSuraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: default avatarJani Nikula <jani.nikula@intel.com>
Link: https://lore.kernel.org/r/20250819160438.145734-1-suraj.kandpal@intel.com
parent 9b1795e9

drivers/gpu/drm/i915/display/intel_backlight.c

+2 −1
Original line number Diff line number Diff line
@@ -236,7 +236,8 @@ static void i9xx_set_backlight(const struct drm_connector_state *conn_state, u32 
	struct intel_panel *panel = &connector->panel;

	u32 tmp, mask;



	drm_WARN_ON(display->drm, panel->backlight.pwm_level_max == 0);

	if (drm_WARN_ON(display->drm, panel->backlight.pwm_level_max == 0))

		return;



	if (panel->backlight.combination_mode) {

		struct pci_dev *pdev = to_pci_dev(display->drm->dev);