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component: fix bug with legacy API 

Sachin Kamat reports that "component: add support for component match
array" broke Exynos DRM due to a NULL pointer deref.  Fix this.

Reported-by: Sachin Kamat <sachin.kamat@samsung.com>
Tested-by: Sachin Kamat <sachin.kamat@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
hifive-unleashed-5.1
Russell King 2014-07-04 13:23:46 +01:00
parent 6955b58254
commit b509cc8022
1 changed files with 6 additions and 4 deletions
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10
drivers/base/component.c
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@ -293,10 +293,12 @@ int component_master_add_with_match(struct device *dev,
if (ops->add_components && match)
return -EINVAL;
/* Reallocate the match array for its true size */
match = component_match_realloc(dev, match, match->num);
if (IS_ERR(match))
return PTR_ERR(match);
if (match) {
/* Reallocate the match array for its true size */
match = component_match_realloc(dev, match, match->num);
if (IS_ERR(match))
return PTR_ERR(match);
}
master = kzalloc(sizeof(*master), GFP_KERNEL);
if (!master)