Messages in this thread Patch in this message | | | Date | Tue, 11 Apr 2006 12:54:48 +0200 | From | "Andi Kleen" <> | Subject | [PATCH] [5/7] i386/x86-64: Remove checks for value == NULL in PCI config space access |
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Nobody should pass NULL here. Could in theory make it a BUG, but the NULL pointer oops will do as well.
Signed-off-by: Andi Kleen <ak@suse.de>
--- arch/i386/pci/direct.c | 6 ++++-- arch/i386/pci/mmconfig.c | 2 +- arch/x86_64/pci/mmconfig.c | 2 +- 3 files changed, 6 insertions(+), 4 deletions(-)
Index: linux/arch/i386/pci/direct.c =================================================================== --- linux.orig/arch/i386/pci/direct.c +++ linux/arch/i386/pci/direct.c @@ -19,7 +19,7 @@ int pci_conf1_read(unsigned int seg, uns { unsigned long flags; - if (!value || (bus > 255) || (devfn > 255) || (reg > 255)) { + if ((bus > 255) || (devfn > 255) || (reg > 255)) { *value = -1; return -EINVAL; } @@ -94,8 +94,10 @@ static int pci_conf2_read(unsigned int s unsigned long flags; int dev, fn; - if (!value || (bus > 255) || (devfn > 255) || (reg > 255)) + if ((bus > 255) || (devfn > 255) || (reg > 255)) { + *value = -1; return -EINVAL; + } dev = PCI_SLOT(devfn); fn = PCI_FUNC(devfn); Index: linux/arch/i386/pci/mmconfig.c =================================================================== --- linux.orig/arch/i386/pci/mmconfig.c +++ linux/arch/i386/pci/mmconfig.c @@ -80,7 +80,7 @@ static int pci_mmcfg_read(unsigned int s unsigned long flags; u32 base; - if (!value || (bus > 255) || (devfn > 255) || (reg > 4095)) { + if ((bus > 255) || (devfn > 255) || (reg > 4095)) { *value = -1; return -EINVAL; } Index: linux/arch/x86_64/pci/mmconfig.c =================================================================== --- linux.orig/arch/x86_64/pci/mmconfig.c +++ linux/arch/x86_64/pci/mmconfig.c @@ -75,7 +75,7 @@ static int pci_mmcfg_read(unsigned int s char __iomem *addr; /* Why do we have this when nobody checks it. How about a BUG()!? -AK */ - if (unlikely(!value || (bus > 255) || (devfn > 255) || (reg > 4095))) { + if (unlikely((bus > 255) || (devfn > 255) || (reg > 4095))) { *value = -1; return -EINVAL; } - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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