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| author | Randy Dunlap <randy.dunlap@oracle.com> | 2007-10-05 13:17:58 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-10-12 15:03:17 -0700 |
| commit | 7f785763660e75c9eddaddea3d618696af4ae3a2 (patch) | |
| tree | 4538775b2b0f05d77509dd2b6b91ba9e6429154c | |
| parent | fd6e732186ab522c812ab19c2c5e5befb8ec8115 (diff) | |
| download | linux-exynos-7f785763660e75c9eddaddea3d618696af4ae3a2.tar.gz linux-exynos-7f785763660e75c9eddaddea3d618696af4ae3a2.tar.bz2 linux-exynos-7f785763660e75c9eddaddea3d618696af4ae3a2.zip | |
pci: implement "pci=noaer"
For cases in which CONFIG_PCIEAER=y (such as distro kernels), allow users
to disable PCIE Advanced Error Reporting by using "pci=noaer" on the
kernel command line.
This can be used to work around hardware or (kernel) software problems.
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | Documentation/kernel-parameters.txt | 4 | ||||
| -rw-r--r-- | drivers/pci/pci.c | 2 | ||||
| -rw-r--r-- | drivers/pci/pci.h | 6 | ||||
| -rw-r--r-- | drivers/pci/pcie/aer/aerdrv.c | 9 |
4 files changed, 21 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index a57c1f216b21..3f0173f45019 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -68,6 +68,7 @@ parameter is applicable: PARIDE The ParIDE (parallel port IDE) subsystem is enabled. PARISC The PA-RISC architecture is enabled. PCI PCI bus support is enabled. + PCIE PCI Express support is enabled. PCMCIA The PCMCIA subsystem is enabled. PNP Plug & Play support is enabled. PPC PowerPC architecture is enabled. @@ -1270,6 +1271,9 @@ and is between 256 and 4096 characters. It is defined in the file Mechanism 1. conf2 [X86-32] Force use of PCI Configuration Mechanism 2. + noaer [PCIE] If the PCIEAER kernel config parameter is + enabled, this kernel boot option can be used to + disable the use of PCIE advanced error reporting. nommconf [X86-32,X86_64] Disable use of MMCONFIG for PCI Configuration nomsi [MSI] If the PCI_MSI kernel config parameter is diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 19a64a36ecab..2dd5c282fabe 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -1586,6 +1586,8 @@ static int __devinit pci_setup(char *str) if (*str && (str = pcibios_setup(str)) && *str) { if (!strcmp(str, "nomsi")) { pci_no_msi(); + } else if (!strcmp(str, "noaer")) { + pci_no_aer(); } else if (!strncmp(str, "cbiosize=", 9)) { pci_cardbus_io_size = memparse(str + 9, &str); } else if (!strncmp(str, "cbmemsize=", 10)) { diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 4c36e80f6d26..5360d73d4941 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -52,6 +52,12 @@ void pci_restore_msi_state(struct pci_dev *dev); static inline void pci_restore_msi_state(struct pci_dev *dev) {} #endif +#ifdef CONFIG_PCIEAER +void pci_no_aer(void); +#else +static inline void pci_no_aer(void) { } +#endif + static inline int pci_no_d1d2(struct pci_dev *dev) { unsigned int parent_dstates = 0; diff --git a/drivers/pci/pcie/aer/aerdrv.c b/drivers/pci/pcie/aer/aerdrv.c index ad90a01b0dfc..7a62f7dd9009 100644 --- a/drivers/pci/pcie/aer/aerdrv.c +++ b/drivers/pci/pcie/aer/aerdrv.c @@ -81,6 +81,13 @@ static struct pcie_port_service_driver aerdriver = { .reset_link = aer_root_reset, }; +static int pcie_aer_disable; + +void pci_no_aer(void) +{ + pcie_aer_disable = 1; /* has priority over 'forceload' */ +} + /** * aer_irq - Root Port's ISR * @irq: IRQ assigned to Root Port @@ -327,6 +334,8 @@ static void aer_error_resume(struct pci_dev *dev) **/ static int __init aer_service_init(void) { + if (pcie_aer_disable) + return -ENXIO; return pcie_port_service_register(&aerdriver); } |