drm/gma500: remove set but not used variables 'hist_reg'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/gpu/drm/gma500/psb_irq.c: In function psb_irq_turn_off_dpst:
drivers/gpu/drm/gma500/psb_irq.c:473:6:
	warning: variable hist_reg set but not used [-Wunused-but-set-variable]

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Chen Zhou <chenzhou10@huawei.com>
Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191227114811.14907-1-chenzhou10@huawei.com

diff --git a/drivers/gpu/drm/gma500/psb_irq.c b/drivers/gpu/drm/gma500/psb_irq.c
index 40a37e400b023fcc6d4398ae8a37418a9bb6b1e2..91f90016dba9dcafd07ec0bdbf473a5853ab5fd7 100644 (file)
--- a/drivers/gpu/drm/gma500/psb_irq.c
+++ b/drivers/gpu/drm/gma500/psb_irq.c
@@ -470,12 +470,11 @@ void psb_irq_turn_off_dpst(struct drm_device *dev)
 {
        struct drm_psb_private *dev_priv =
            (struct drm_psb_private *) dev->dev_private;
-       u32 hist_reg;
        u32 pwm_reg;
 
        if (gma_power_begin(dev, false)) {
                PSB_WVDC32(0x00000000, HISTOGRAM_INT_CONTROL);
-               hist_reg = PSB_RVDC32(HISTOGRAM_INT_CONTROL);
+               PSB_RVDC32(HISTOGRAM_INT_CONTROL);
 
                psb_disable_pipestat(dev_priv, 0, PIPE_DPST_EVENT_ENABLE);