From 49c93e84d8b2d602a07c302c7e3cd4fa09095fbb Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Fri, 7 Apr 2006 19:50:15 +0200 Subject: [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: Andi Kleen Signed-off-by: Linus Torvalds --- arch/x86_64/pci/mmconfig.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'arch/x86_64/pci/mmconfig.c') diff --git a/arch/x86_64/pci/mmconfig.c b/arch/x86_64/pci/mmconfig.c index d4e25f38287..b493ed977e7 100644 --- a/arch/x86_64/pci/mmconfig.c +++ b/arch/x86_64/pci/mmconfig.c @@ -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) -- cgit v1.2.3