linux-kernel - [patch] [media] usb/cpia2_core: clean up a min

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Message-ID: <20160209111411.GA23998@mwanda>
Date:	Tue, 9 Feb 2016 14:14:12 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Mauro Carvalho Chehab <mchehab@....samsung.com>
Cc:	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [patch] [media] usb/cpia2_core: clean up a min_t() cast

It makes sense to make the min_t() cast unsigned here since we don't
really want negative sizes.  Making it signed causes a static checker
warning in Smatch.  Smatch knows "fw->size - i" is positive but it
doesn't know that fw->size is less than INT_MAX so in theory casting it
to int might lead to a negative.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

diff --git a/drivers/media/usb/cpia2/cpia2_core.c b/drivers/media/usb/cpia2/cpia2_core.c
index 187012c..0310fd6 100644
--- a/drivers/media/usb/cpia2/cpia2_core.c
+++ b/drivers/media/usb/cpia2/cpia2_core.c
@@ -923,7 +923,7 @@ static int apply_vp_patch(struct camera_data *cam)
 	/* ... followed by the data payload */
 	for (i = 2; i < fw->size; i += 64) {
 		cmd.start = 0x0C; /* Data */
-		cmd.reg_count = min_t(int, 64, fw->size - i);
+		cmd.reg_count = min_t(uint, 64, fw->size - i);
 		memcpy(cmd.buffer.block_data, &fw->data[i], cmd.reg_count);
 		cpia2_send_command(cam, &cmd);
 	}