linux-kernel - [PATCH] media: ov5640: Fix check for PLL1 exceeding max allowed rate

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Date:   Tue, 29 Oct 2019 07:42:11 -0500
From:   Adam Ford <aford173@...il.com>
To:     linux-media@...r.kernel.org
Cc:     mchehab@...nel.org, slongerbeam@...il.com,
        maxime.ripard@...tlin.com, adam.ford@...icpd.com,
        linux-kernel@...r.kernel.org, Adam Ford <aford173@...il.com>
Subject: [PATCH] media: ov5640: Fix check for PLL1 exceeding max allowed rate

The variable _rate is by ov5640_compute_sys_clk() which returns
zero if the PLL exceeds 1GHz.  Unfortunately, the check to see
if the max PLL1 output is checking 'rate' and not '_rate' and
'rate' does not ever appear to be 0.

This patch changes the check against the returned value of
'_rate' to determine if the PLL1 output exceeds 1GHz.

Fixes: aa2882481cad ("media: ov5640: Adjust the clock based on the expected rate")

Signed-off-by: Adam Ford <aford173@...il.com>

diff --git a/drivers/media/i2c/ov5640.c b/drivers/media/i2c/ov5640.c
index 5e495c833d32..bb968e764f31 100644
--- a/drivers/media/i2c/ov5640.c
+++ b/drivers/media/i2c/ov5640.c
@@ -874,7 +874,7 @@ static unsigned long ov5640_calc_sys_clk(struct ov5640_dev *sensor,
 			 * We have reached the maximum allowed PLL1 output,
 			 * increase sysdiv.
 			 */
-			if (!rate)
+			if (!_rate)
 				break;
 
 			/*
-- 
2.17.1