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| author | Andi Kleen <ak@suse.de> | 2006-04-07 19:50:15 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-04-09 11:53:52 -0700 |
| commit | 49c93e84d8b2d602a07c302c7e3cd4fa09095fbb (patch) | |
| tree | a59d0bb7a9f1df9f3187e466e3937ea9ffd83343 | |
| parent | 8c30b1a74aed4041f183e183a149b7dfbdc6c20e (diff) | |
| download | op-kernel-dev-49c93e84d8b2d602a07c302c7e3cd4fa09095fbb.zip op-kernel-dev-49c93e84d8b2d602a07c302c7e3cd4fa09095fbb.tar.gz | |
[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 <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | arch/i386/pci/direct.c | 4 | ||||
| -rw-r--r-- | arch/i386/pci/mmconfig.c | 4 | ||||
| -rw-r--r-- | 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 4457cf3..0659ced 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 2002c74..f77d7f8 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 d4e25f38..b493ed9 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) |
