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authorvignesh babu <vignesh.babu@wipro.com>2007-08-13 18:23:14 +0530
committerGreg Kroah-Hartman <gregkh@suse.de>2007-10-12 15:03:15 -0700
commit229f5afded86bf3819b7b67e57c62813ca0648a7 (patch)
tree608b5b355cb36bc93da24772eedfdd4b0c19ac0e /drivers/pci
parent40730d1042c595b1e84b28e40021f2c1377b4f8b (diff)
PCI: is_power_of_2 in drivers/pci/pci.c
Replacing n & (n - 1) for power of 2 check by is_power_of_2(n) Signed-off-by: vignesh babu <vignesh.babu@wipro.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/pci.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 37c00f6fd80..19a64a36eca 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -17,6 +17,7 @@
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/string.h>
+#include <linux/log2.h>
#include <asm/dma.h> /* isa_dma_bridge_buggy */
#include "pci.h"
@@ -1454,7 +1455,7 @@ int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc)
int cap, err = -EINVAL;
u32 stat, cmd, v, o;
- if (mmrbc < 512 || mmrbc > 4096 || (mmrbc & (mmrbc-1)))
+ if (mmrbc < 512 || mmrbc > 4096 || !is_power_of_2(mmrbc))
goto out;
v = ffs(mmrbc) - 10;
@@ -1526,7 +1527,7 @@ int pcie_set_readrq(struct pci_dev *dev, int rq)
int cap, err = -EINVAL;
u16 ctl, v;
- if (rq < 128 || rq > 4096 || (rq & (rq-1)))
+ if (rq < 128 || rq > 4096 || !is_power_of_2(rq))
goto out;
v = (ffs(rq) - 8) << 12;