ACPI: Move dereference after NULL test

If the NULL test on pr is needed, then the dereference should be after the
NULL test.

A simplified version of the semantic match that detects this problem is as
follows (http://coccinelle.lip6.fr/):

// <smpl>
@match exists@
expression x, E;
identifier fld;
@@

* x->fld
  ... when != \(x = E\|&x\)
* x == NULL
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/acpi/processor_throttling.c b/drivers/acpi/processor_throttling.c
index 4c6c14c1e307..1c5d7a8b2fdf 100644
--- a/drivers/acpi/processor_throttling.c
+++ b/drivers/acpi/processor_throttling.c
@@ -1133,15 +1133,15 @@ int acpi_processor_get_throttling_info(struct acpi_processor *pr)
         int result = 0;
         struct acpi_processor_throttling *pthrottling;
 
+        if (!pr)
+                return -EINVAL;
+
         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
                           "pblk_address[0x%08x] duty_offset[%d] duty_width[%d]\n",
                           pr->throttling.address,
                           pr->throttling.duty_offset,
                           pr->throttling.duty_width));
 
-        if (!pr)
-                return -EINVAL;
-
         /*
          * Evaluate _PTC, _TSS and _TPC
          * They must all be present or none of them can be used.