diff options
| author |   Colin Ian King <colin.king@canonical.com> | 2019-07-22 23:25:35 +0100 |
|---|---|---|
| committer |   Inki Dae <inki.dae@samsung.com> | 2019-08-02 16:50:18 +0900 |
| commit | 1bbbab097a05276e312dd2462791d32b21ceb1ee (patch) | |
| tree | ba7e69a41af383c7e3f66cea46191965bb606d69 /drivers/gpu | |
| parent | drm/exynos: add CONFIG_MMU dependency (diff) | |
| download | linux-dev-1bbbab097a05276e312dd2462791d32b21ceb1ee.tar.xz linux-dev-1bbbab097a05276e312dd2462791d32b21ceb1ee.zip | |
drm/exynos: fix missing decrement of retry counter
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.king@canonical.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_scaler.c | 4 |
1 files 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; } |