UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

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>
This commit is contained in:
vignesh babu 2007-08-13 18:23:14 +05:30 committed by Greg Kroah-Hartman
parent 40730d1042
commit 229f5afded
1 changed files with 3 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/pci/pci.c
View File

@ -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;