net/ipv4: Use IS_ERR_OR_NULL
net/ipv4: Use IS_ERR_OR_NULL

This patch introduces the use of the macro IS_ERR_OR_NULL in place of
tests for NULL and IS_ERR.

The following Coccinelle semantic patch was used for making the change:

@@
expression e;
@@

- e == NULL || IS_ERR(e)
+ IS_ERR_OR_NULL(e)
 || ...

Signed-off-by: Himangi Saraogi <23256c5b125c18bd580b7fa252de87dcf0c3a427@gmail.com>
Acked-by: Julia Lawall <018ee4f95fc49739477deedb13d2cd210889e607@lip6.fr>
Signed-off-by: David S. Miller <fe08d3c717adf2ae63592e4c9aec6e3e404d8e3e@davemloft.net>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs