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pci: Parenthesize parameters in PCI_DEVID and PCI_VPD_LRDT_ID macros

Message ID 1410000596-24190-1-git-send-email-jeffrey.t.kirsher@intel.com
State Accepted
Headers show

Commit Message

Kirsher, Jeffrey T Sept. 6, 2014, 10:49 a.m. UTC
From: Megan Kamiya <megan.a.kamiya@intel.com>

Add parentheses around parameters in PCI_DEVID and PCI_VPD_LRDT_ID
macros to prevent possible expansion errors as described by the CERT
Secure Coding Standard: PRE01-C: Use parentheses within macros around
parameter names

Signed-off-by: Megan Kamiya <megan.a.kamiya@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 include/linux/pci.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Comments

Kirsher, Jeffrey T Sept. 6, 2014, 10:55 a.m. UTC | #1
On Sat, 2014-09-06 at 03:49 -0700, Jeff Kirsher wrote:
> From: Megan Kamiya <megan.a.kamiya@intel.com>
> 
> Add parentheses around parameters in PCI_DEVID and PCI_VPD_LRDT_ID
> macros to prevent possible expansion errors as described by the CERT
> Secure Coding Standard: PRE01-C: Use parentheses within macros around
> parameter names
> 
> Signed-off-by: Megan Kamiya <megan.a.kamiya@intel.com>
> Tested-by: Aaron Brown <aaron.f.brown@intel.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
> ---
>  include/linux/pci.h | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

Sorry for the duplicate, I did not mean to send this out a second time.
diff mbox

Patch

diff --git a/include/linux/pci.h b/include/linux/pci.h
index 61978a4..cb744f3 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -45,7 +45,7 @@ 
  * In the interest of not exposing interfaces to user-space unnecessarily,
  * the following kernel-only defines are being added here.
  */
-#define PCI_DEVID(bus, devfn)  ((((u16)bus) << 8) | devfn)
+#define PCI_DEVID(bus, devfn)  ((((u16)(bus)) << 8) | (devfn))
 /* return bus from PCI devid = ((u16)bus_number) << 8) | devfn */
 #define PCI_BUS_NUM(x) (((x) >> 8) & 0xff)
 
@@ -1701,7 +1701,7 @@  bool pci_acs_path_enabled(struct pci_dev *start,
 			  struct pci_dev *end, u16 acs_flags);
 
 #define PCI_VPD_LRDT			0x80	/* Large Resource Data Type */
-#define PCI_VPD_LRDT_ID(x)		(x | PCI_VPD_LRDT)
+#define PCI_VPD_LRDT_ID(x)		((x) | PCI_VPD_LRDT)
 
 /* Large Resource Data Type Tag Item Names */
 #define PCI_VPD_LTIN_ID_STRING		0x02	/* Identifier String */