提交 49c93e84 编写于 作者: A Andi Kleen 提交者: Linus Torvalds

[PATCH] i386/x86-64: Return defined error value for bad PCI config space accesses

Mostly to get better handling when a extended config space
access has to fallback to Type1.

Cc: gregkh@suse.de
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
上级 8c30b1a7
......@@ -19,8 +19,10 @@ int pci_conf1_read(unsigned int seg, unsigned int bus,
{
unsigned long flags;
if (!value || (bus > 255) || (devfn > 255) || (reg > 255))
if (!value || (bus > 255) || (devfn > 255) || (reg > 255)) {
*value = -1;
return -EINVAL;
}
spin_lock_irqsave(&pci_config_lock, flags);
......
......@@ -80,8 +80,10 @@ static int pci_mmcfg_read(unsigned int seg, unsigned int bus,
unsigned long flags;
u32 base;
if (!value || (bus > 255) || (devfn > 255) || (reg > 4095))
if (!value || (bus > 255) || (devfn > 255) || (reg > 4095)) {
*value = -1;
return -EINVAL;
}
base = get_base_addr(seg, bus, devfn);
if (!base)
......
......@@ -75,8 +75,10 @@ static int pci_mmcfg_read(unsigned int seg, unsigned int bus,
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(!value || (bus > 255) || (devfn > 255) || (reg > 4095))) {
*value = -1;
return -EINVAL;
}
addr = pci_dev_base(seg, bus, devfn);
if (!addr)
......
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