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Commit 229f5afd authored by vignesh babu's avatar vignesh babu Committed by Greg Kroah-Hartman
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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: default avatarvignesh babu <vignesh.babu@wipro.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 40730d10

drivers/pci/pci.c

+3 −2
Original line number Diff line number Diff line
@@ -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;