net: hsr: fix NULL checks in the code
This patch replaces all instance of NULL checks such as if (foo == NULL) with if (!foo) Also if (foo != NULL) with if (foo) This is seen when ran checkpatch.pl -f on files under net/hsr and suggestion is to replace as above. Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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