[PATCH] drm/exynos: fix missing decrement of retry counter

[Colin King]

From: Colin Ian King <colin.k...@canonical.com>

Currently the retry counter is not being decremented, leading to a
potential infinite spin if the scalar_reads don't change state.

Addresses-Coverity: ("Infinite loop")
Fixes: 280e54c9f614 ("drm/exynos: scaler: Reset hardware before starting the 
operation")
Signed-off-by: Colin Ian King <colin.k...@canonical.com>
---
 drivers/gpu/drm/exynos/exynos_drm_scaler.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_scaler.c 
b/drivers/gpu/drm/exynos/exynos_drm_scaler.c
index 9af096479e1c..b24ba948b725 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_scaler.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_scaler.c
@@ -94,12 +94,12 @@ static inline int scaler_reset(struct scaler_context 
*scaler)
        scaler_write(SCALER_CFG_SOFT_RESET, SCALER_CFG);
        do {
                cpu_relax();
-       } while (retry > 1 &&
+       } while (--retry > 1 &&
                 scaler_read(SCALER_CFG) & SCALER_CFG_SOFT_RESET);
        do {
                cpu_relax();
                scaler_write(1, SCALER_INT_EN);
-       } while (retry > 0 && scaler_read(SCALER_INT_EN) != 1);
+       } while (--retry > 0 && scaler_read(SCALER_INT_EN) != 1);
 
        return retry ? 0 : -EIO;
 }
-- 
2.20.1