[PATCH] media: rzg2l-cru: fix a test for timeout

[Dan Carpenter <error27@gmail.com>]

The test for if the loop timed out is wrong and Smatch complains:

    drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c:411 rzg2l_csi2_mipi_link_disable()
    warn: should this be 'timeout == -1'

Let's change it to a preop loop instead of a post op loop.

Fixes: 51e8415e39a9 ("media: platform: Add Renesas RZ/G2L MIPI CSI-2 receiver driver")
Signed-off-by: Dan Carpenter <error27@gmail.com>
---
This does change the number of iterations from 20 to 19 but generally
retry counts are approximations.

 drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c
index aa752b80574c..1bc27aec0265 100644
--- a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c
+++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c
@@ -402,7 +402,7 @@ static void rzg2l_csi2_mipi_link_disable(struct rzg2l_csi2 *csi2)
 	rzg2l_csi2_write(csi2, CSI2nRTCT, CSI2nRTCT_VSRST);
 
 	/* Make sure CSI2nRTST.VSRSTS bit is cleared */
-	while (timeout--) {
+	while (--timeout) {
 		if (!(rzg2l_csi2_read(csi2, CSI2nRTST) & CSI2nRTST_VSRSTS))
 			break;
 		usleep_range(100, 200);
-- 
2.35.1