Messages in this thread | | | Date | Tue, 12 Apr 2016 07:31:44 -0700 | From | Greg Kroah-Hartman <> | Subject | Re: [PATCH 4.5 026/238] PCI: Disable IO/MEM decoding for devices with non-compliant BARs |
| |
On Tue, Apr 12, 2016 at 12:45:13AM +0100, Ben Hutchings wrote: > On Sun, 2016-04-10 at 11:33 -0700, Greg Kroah-Hartman wrote: > > 4.5-stable review patch. If anyone has any objections, please let me know. > > > > ------------------ > > > > From: Bjorn Helgaas <bhelgaas@google.com> > > > > commit b84106b4e2290c081cdab521fa832596cdfea246 upstream. > > > > The PCI config header (first 64 bytes of each device's config space) is > > defined by the PCI spec so generic software can identify the device and > > manage its usage of I/O, memory, and IRQ resources. > > > > Some non-spec-compliant devices put registers other than BARs where the > > BARs should be. When the PCI core sizes these "BARs", the reads and writes > > it does may have unwanted side effects, and the "BAR" may appear to > > describe non-sensical address space. > > > > Add a flag bit to mark non-compliant devices so we don't touch their BARs. > > Turn off IO/MEM decoding to prevent the devices from consuming address > > space, since we can't read the BARs to find out what that address space > > would be. > [...] > > No objection, but patch 005/238 seems to depend on this so please > reorder them so bisection will work.
Now reordered, thanks.
greg k-h
| |