scsi: fnic: Use vzalloc()

Use vzalloc() instead of hand writing it with vmalloc()+memset(). This is
less verbose.

This also fixes some style issues :)

Signed-off-by: Christophe JAILLET <[e-mail]>
Link: https://lore.kernel.org/r/a1179941a6[e-mail]
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/fnic/fnic_debugfs.c

···
 		return -ENOMEM;
 
 	if (*rdata_ptr == fc_trc_flag->fnic_trace) {
-		fnic_dbg_prt->buffer = vmalloc(array3_size(3, trace_max_pages,
+		fnic_dbg_prt->buffer = vzalloc(array3_size(3, trace_max_pages,
 							   PAGE_SIZE));
 		if (!fnic_dbg_prt->buffer) {
 			kfree(fnic_dbg_prt);
 			return -ENOMEM;
 		}
-		memset((void *)fnic_dbg_prt->buffer, 0,
-		3 * (trace_max_pages * PAGE_SIZE));
 		fnic_dbg_prt->buffer_len = fnic_get_trace_data(fnic_dbg_prt);
 	} else {
 		fnic_dbg_prt->buffer =
-			vmalloc(array3_size(3, fnic_fc_trace_max_pages,
+			vzalloc(array3_size(3, fnic_fc_trace_max_pages,
 					    PAGE_SIZE));
 		if (!fnic_dbg_prt->buffer) {
 			kfree(fnic_dbg_prt);
 			return -ENOMEM;
 		}
-		memset((void *)fnic_dbg_prt->buffer, 0,
-			3 * (fnic_fc_trace_max_pages * PAGE_SIZE));
 		fnic_dbg_prt->buffer_len =
 			fnic_fc_trace_get_data(fnic_dbg_prt, *rdata_ptr);
 	}