On 02/29/2012 02:09 PM, Rafael J. Wysocki wrote: > From: Rafael J. Wysocki <rjw@xxxxxxx> > > There are PCIe devices on the market that report ARI support but > then fail to initialize correctly when ARI is actually used. This > leads to situations in which kernels 2.6.34 and newer fail to handle > systems where the previous kernels worked without any apparent > problems. Unfortunately, it is currently unknown how many such > devices are there. > > For this reason, introduce a new kernel command line option, > pci=noari, allowing users to disable PCIe ARI altogether if they > see problems with PCIe device initialization. > > Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx> > --- > drivers/pci/pci.c | 7 ++++++- > 1 file changed, 6 insertions(+), 1 deletion(-) > > Index: linux/drivers/pci/pci.c > =================================================================== > --- linux.orig/drivers/pci/pci.c > +++ linux/drivers/pci/pci.c > @@ -94,6 +94,9 @@ u8 pci_cache_line_size; > */ > unsigned int pcibios_max_latency = 255; > > +/* If set, the PCIe ARI capability will not be used. */ > +static bool pcie_ari_disabled; Please update Documentation/kernel-parameters.txt . -- ~Randy -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
