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From:   YueHaibing <yuehaibing@huawei.com>
To:     <sakari.ailus@linux.intel.com>, <mchehab@kernel.org>,
        <gregkh@linuxfoundation.org>
CC:     <linux-kernel@vger.kernel.org>, <devel@driverdev.osuosl.org>,
        <linux-media@vger.kernel.org>, YueHaibing <yuehaibing@huawei.com>
Subject: [PATCH -next] media: staging/intel-ipu3: Fix err handle of ipu3_css_find_binary
Date:   Sat, 29 Dec 2018 10:45:28 +0800
Message-ID: <20181229024528.6016-1-yuehaibing@huawei.com>
MIME-Version: 1.0
Content-Type: text/plain
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

'bindex' is unsigned, it never less than zero.
This patch bring int 'binary' back to handle the err condition.

Fixes: 51abe041c5ed ("media: staging/intel-ipu3: Add dual pipe support")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
---
 drivers/staging/media/ipu3/ipu3-css.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/media/ipu3/ipu3-css.c b/drivers/staging/media/ipu3/ipu3-css.c
index 44c5563..28f0c02 100644
--- a/drivers/staging/media/ipu3/ipu3-css.c
+++ b/drivers/staging/media/ipu3/ipu3-css.c
@@ -1751,7 +1751,7 @@ int ipu3_css_fmt_try(struct ipu3_css *css,
 					&q[IPU3_CSS_QUEUE_OUT].fmt.mpix;
 	struct v4l2_pix_format_mplane *const vf =
 					&q[IPU3_CSS_QUEUE_VF].fmt.mpix;
-	int i, s;
+	int i, s, binary;
 
 	/* Adjust all formats, get statistics buffer sizes and formats */
 	for (i = 0; i < IPU3_CSS_QUEUES; i++) {
@@ -1826,13 +1826,13 @@ int ipu3_css_fmt_try(struct ipu3_css *css,
 	s = (bds->height - gdc->height) / 2 - FILTER_SIZE;
 	env->height = s < MIN_ENVELOPE ? MIN_ENVELOPE : s;
 
-	css->pipes[pipe].bindex =
-		ipu3_css_find_binary(css, pipe, q, r);
-	if (css->pipes[pipe].bindex < 0) {
+	binary = ipu3_css_find_binary(css, pipe, q, r);
+	if (binary < 0) {
 		dev_err(css->dev, "failed to find suitable binary\n");
 		return -EINVAL;
 	}
 
+	css->pipes[pipe].bindex = binary;
 	dev_dbg(css->dev, "Binary index %d for pipe %d found.",
 		css->pipes[pipe].bindex, pipe);
 
-- 
2.7.0