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media: dvb_frontend: fix ifnullfree.cocci warnings

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drivers/media/dvb-core/dvb_frontend.c:154:2-7: WARNING: NULL check before freeing functions like kfree, debugfs_remove, debugfs_remove_recursive or usb_free_urb is not needed. Maybe consider reorganizing relevant code to avoid passing NULL values.

 NULL check before some freeing functions is not needed.

 Based on checkpatch warning
 "kfree(NULL) is safe this check is probably not required"
 and kfreeaddr.cocci by Julia Lawall.

Generated by: scripts/coccinelle/free/ifnullfree.cocci

Fixes: b1cb7372fa ("dvb_frontend: don't use-after-free the frontend struct")

Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Fengguang Wu 2017-11-27 04:25:29 -05:00 committed by Mauro Carvalho Chehab
parent 22f584c5c6
commit b1728ff617
1 changed files with 1 additions and 2 deletions
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drivers/media/dvb-core/dvb_frontend.c
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@ -150,8 +150,7 @@ static void __dvb_frontend_free(struct dvb_frontend *fe)
dvb_frontend_invoke_release(fe, fe->ops.release);
if (fepriv)
kfree(fepriv);
kfree(fepriv);
}
static void dvb_frontend_free(struct kref *ref)