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45 lines
1.6 KiB
Diff
45 lines
1.6 KiB
Diff
From 1a013467030ffd6f1958b8a4db1b5312213fb9bd Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.org>
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Date: Thu, 17 Oct 2019 10:16:16 +0100
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Subject: [PATCH] media: bcm2835-unicam: Replace hard coded loop limit
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with a define
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In order to protect against a dodgy sensor driver never returning
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an error from enum_mbus_code there was a hardcoded value of 128
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that aborted the loop.
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There is a need to call enum_mbus_code from elsewhere, so move that
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number to a define so it is common across calls.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
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---
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drivers/media/platform/bcm2835/bcm2835-unicam.c | 11 ++++++-----
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1 file changed, 6 insertions(+), 5 deletions(-)
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--- a/drivers/media/platform/bcm2835/bcm2835-unicam.c
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+++ b/drivers/media/platform/bcm2835/bcm2835-unicam.c
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@@ -97,6 +97,11 @@ MODULE_PARM_DESC(debug, "Debug level 0-3
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#define unicam_err(dev, fmt, arg...) \
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v4l2_err(&(dev)->v4l2_dev, fmt, ##arg)
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+/* To protect against a dodgy sensor driver never returning an error from
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+ * enum_mbus_code, set a maximum index value to be used.
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+ */
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+#define MAX_ENUM_MBUS_CODE 128
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+
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/*
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* Stride is a 16 bit register, but also has to be a multiple of 16.
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*/
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@@ -738,11 +743,7 @@ static int unicam_enum_fmt_vid_cap(struc
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int ret = 0;
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int i;
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- /* Loop whilst the sensor driver says it has more formats, but add a
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- * failsafe against a dodgy driver at 128 (more than any sensor will
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- * ever sensibly advertise)
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- */
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- for (i = 0; !ret && i < 128 ; i++) {
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+ for (i = 0; !ret && i < MAX_ENUM_MBUS_CODE; i++) {
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memset(&mbus_code, 0, sizeof(mbus_code));
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mbus_code.index = i;
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