hpsa: check for null arguments to dev_printk
Check for NULLs. Reviewed-by: NTomas Henzl <thenzl@redhat.com> Reviewed-by: NManoj Kumar <manoj@linux.vnet.ibm.com> Signed-off-by: NDon Brace <don.brace@pmcs.com> Reviewed-by: NHannes Reinecke <hare@suse.de> Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>
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