[MIPS] 0 -> NULL

When comparing a pointer, it's clearer to compare it to NULL than to 0.

Here is an excerpt of the semantic patch:

@@
expression *E;
@@

  E ==
- 0
+ NULL

@@
expression *E;
@@

  E !=
- 0
+ NULL

Signed-off-by: Yoann Padioleau <padator@wanadoo.fr>
Cc: ralf@linux-mips.org
Cc: linux-mips@linux-mips.org
Cc: akpm@linux-foundation.org
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 6 insertions, 6 deletions

diff --git a/arch/mips/pci/ops-pnx8550.c b/arch/mips/pci/ops-pnx8550.c
index f556b7a8dccd..d61064652498 100644
--- a/arch/mips/pci/ops-pnx8550.c
+++ b/arch/mips/pci/ops-pnx8550.c
@@ -117,7 +117,7 @@ read_config_byte(struct pci_bus *bus, unsigned int devfn, int where, u8 * val)
         unsigned int data = 0;
         int err;
 
-        if (bus == 0)
+        if (bus == NULL)
                 return -1;
 
         err = config_access(PCI_CMD_CONFIG_READ, bus, devfn, where, ~(1 << (where & 3)), &data);
@@ -145,7 +145,7 @@ read_config_word(struct pci_bus *bus, unsigned int devfn, int where, u16 * val)
         unsigned int data = 0;
         int err;
 
-        if (bus == 0)
+        if (bus == NULL)
                 return -1;
 
         if (where & 0x01)
@@ -168,7 +168,7 @@ static int
 read_config_dword(struct pci_bus *bus, unsigned int devfn, int where, u32 * val)
 {
         int err;
-        if (bus == 0)
+        if (bus == NULL)
                 return -1;
 
         if (where & 0x03)
@@ -185,7 +185,7 @@ write_config_byte(struct pci_bus *bus, unsigned int devfn, int where, u8 val)
         unsigned int data = (unsigned int)val;
         int err;
 
-        if (bus == 0)
+        if (bus == NULL)
                 return -1;
 
         switch (where & 0x03) {
@@ -213,7 +213,7 @@ write_config_word(struct pci_bus *bus, unsigned int devfn, int where, u16 val)
         unsigned int data = (unsigned int)val;
         int err;
 
-        if (bus == 0)
+        if (bus == NULL)
                 return -1;
 
         if (where & 0x01)
@@ -235,7 +235,7 @@ static int
 write_config_dword(struct pci_bus *bus, unsigned int devfn, int where, u32 val)
 {
         int err;
-        if (bus == 0)
+        if (bus == NULL)
                 return -1;
 
         if (where & 0x03)