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| author |   Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-09-05 16:35:20 -0400 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-09-06 09:22:02 -0400 |
| commit | 80ba77dfbce85f2d1be54847de3c866de1b18a9a (patch) | |
| tree | aa754a14121008b0c0be0bed02e2cb2367d05eae /drivers/xen/gntdev.c | |
| parent | xen: Use correct masking in xen_swiotlb_alloc_coherent. (diff) | |
| download | linux-dev-80ba77dfbce85f2d1be54847de3c866de1b18a9a.tar.xz linux-dev-80ba77dfbce85f2d1be54847de3c866de1b18a9a.zip | |
xen/pciback: Fix proper FLR steps.
When we do FLR and save PCI config we did it in the wrong order.
The end result was that if a PCI device was unbind from
its driver, then binded to xen-pciback, and then back to its
driver we would get:
> lspci -s 04:00.0
04:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection
13:42:12 # 4 :~/
> echo "0000:04:00.0" > /sys/bus/pci/drivers/pciback/unbind
> modprobe e1000e
e1000e: Intel(R) PRO/1000 Network Driver - 2.0.0-k
e1000e: Copyright(c) 1999 - 2012 Intel Corporation.
e1000e 0000:04:00.0: Disabling ASPM L0s L1
e1000e 0000:04:00.0: enabling device (0000 -> 0002)
xen: registering gsi 48 triggering 0 polarity 1
Already setup the GSI :48
e1000e 0000:04:00.0: Interrupt Throttling Rate (ints/sec) set to dynamic conservative mode
e1000e: probe of 0000:04:00.0 failed with error -2
This fixes it by first saving the PCI configuration space, then
doing the FLR.
Reported-by: Ren, Yongjie <yongjie.ren@intel.com>
Reported-and-Tested-by: Tobias Geiger <tobias.geiger@vido.info>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
CC: stable@vger.kernel.org
Diffstat (limited to 'drivers/xen/gntdev.c')
0 files changed, 0 insertions, 0 deletions