From 49c93e84d8b2d602a07c302c7e3cd4fa09095fbb Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Fri, 7 Apr 2006 19:50:15 +0200 Subject: [PATCH] [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/i386/pci/direct.c | 4 +++- arch/i386/pci/mmconfig.c | 4 +++- arch/x86_64/pci/mmconfig.c | 4 +++- 3 files changed, 9 insertions(+), 3 deletions(-) diff --git a/arch/i386/pci/direct.c b/arch/i386/pci/direct.c index 4457cf3eb401..0659ced01185 100644 --- a/arch/i386/pci/direct.c +++ b/arch/i386/pci/direct.c @@ -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); diff --git a/arch/i386/pci/mmconfig.c b/arch/i386/pci/mmconfig.c index 2002c741a383..f77d7f8b9bf6 100644 --- a/arch/i386/pci/mmconfig.c +++ b/arch/i386/pci/mmconfig.c @@ -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) diff --git a/arch/x86_64/pci/mmconfig.c b/arch/x86_64/pci/mmconfig.c index d4e25f38287d..b493ed977e7c 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) -- 2.20.1