From: Jesper Juhl <jesper.juhl@gmail.com>

The Coverity checker noticed that we have a potential NULL pointer
deref in drivers/scsi/aic7xxx/aic7xxx_core.c::ahc_print_register().
This patch handles it by adding the same test against NULL that is
used elsewhere in the same function.

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/scsi/aic7xxx/aic7xxx_core.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletion(-)

diff -puN drivers/scsi/aic7xxx/aic7xxx_core.c~fix-a-potential-null-pointer-deref-in-the-aic7xxx-ahc_print_register-function drivers/scsi/aic7xxx/aic7xxx_core.c
--- a/drivers/scsi/aic7xxx/aic7xxx_core.c~fix-a-potential-null-pointer-deref-in-the-aic7xxx-ahc_print_register-function
+++ a/drivers/scsi/aic7xxx/aic7xxx_core.c
@@ -6557,7 +6557,8 @@ ahc_print_register(ahc_reg_parse_entry_t
 	printed = printf("%s[0x%x]", name, value);
 	if (table == NULL) {
 		printed += printf(" ");
-		*cur_column += printed;
+		if (cur_column != NULL)
+			*cur_column += printed;
 		return (printed);
 	}
 	printed_mask = 0;
_