[PATCH] drm/msm/dpu: tidy up some error checking

[Dan Carpenter <dan.carpenter@linaro.org>]

The "vsync_hz" variable is unsigned int so it can't be less
than zero.  The dpu_kms_get_clk_rate() function used to return a u64
but I previously changed it to return an unsigned long and zero on
error so it matches clk_get_rate().

Change the "vsync_hz" type to unsigned long as well and change the
error checking to check for zero instead of negatives.  This change
does not affect runtime at all.  It's just a clean up.

Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
index d8ed85a238af..6aecaba14e7e 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
@@ -324,7 +324,7 @@ static void dpu_encoder_phys_cmd_tearcheck_config(
 	struct dpu_hw_tear_check tc_cfg = { 0 };
 	struct drm_display_mode *mode;
 	bool tc_enable = true;
-	u32 vsync_hz;
+	unsigned long vsync_hz;
 	struct dpu_kms *dpu_kms;
 
 	if (phys_enc->has_intf_te) {
@@ -359,8 +359,8 @@ static void dpu_encoder_phys_cmd_tearcheck_config(
 	 * frequency divided by the no. of rows (lines) in the LCDpanel.
 	 */
 	vsync_hz = dpu_kms_get_clk_rate(dpu_kms, "vsync");
-	if (vsync_hz <= 0) {
-		DPU_DEBUG_CMDENC(cmd_enc, "invalid - vsync_hz %u\n",
+	if (!vsync_hz) {
+		DPU_DEBUG_CMDENC(cmd_enc, "invalid - vsync_hz %lu\n",
 				 vsync_hz);
 		return;
 	}
@@ -381,7 +381,7 @@ static void dpu_encoder_phys_cmd_tearcheck_config(
 	tc_cfg.rd_ptr_irq = mode->vdisplay + 1;
 
 	DPU_DEBUG_CMDENC(cmd_enc,
-		"tc vsync_clk_speed_hz %u vtotal %u vrefresh %u\n",
+		"tc vsync_clk_speed_hz %lu vtotal %u vrefresh %u\n",
 		vsync_hz, mode->vtotal, drm_mode_vrefresh(mode));
 	DPU_DEBUG_CMDENC(cmd_enc,
 		"tc enable %u start_pos %u rd_ptr_irq %u\n",
-- 
2.39.2