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media: r820t: don't crash if attach fails

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As pointed by smatch:
	drivers/media/tuners/r820t.c:2374 r820t_attach() error: potential null dereference 'priv'.  (kzalloc returns null)

The current function with prints error assumes that the attach
succeeds. So, don't use it in case of failures.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Mauro Carvalho Chehab 2018-03-26 09:18:36 -04:00
parent 17dec0a949
commit 2e81ae3967
1 changed files with 3 additions and 1 deletions
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4
drivers/media/tuners/r820t.c
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@ -20,6 +20,8 @@
//
// RF Gain set/get is not implemented.
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/videodev2.h>
#include <linux/mutex.h>
#include <linux/slab.h>
@ -2371,7 +2373,7 @@ err:
err_no_gate:
mutex_unlock(&r820t_list_mutex);
tuner_info("%s: failed=%d\n", __func__, rc);
pr_info("%s: failed=%d\n", __func__, rc);
r820t_release(fe);
return NULL;
}