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| author | Dexuan Cui <decui@microsoft.com> | 2017-02-10 21:18:46 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-12 05:41:47 (GMT) |
| commit | bc5338a4fd3d9042107ce3fe40792c1c4839ebab (patch) | |
| tree | 93f3cb64832392bb2d72695259df888d86fbd551 /drivers/pci/host | |
| parent | 787fd7a6c8ede68e55321c5bfbea9f1ca89a8148 (diff) | |
| download | linux-bc5338a4fd3d9042107ce3fe40792c1c4839ebab.tar.xz | |
PCI: hv: Fix wslot_to_devfn() to fix warnings on device removal
commit 60e2e2fbafdd1285ae1b4ad39ded41603e0c74d0 upstream.
The devfn of 00:02.0 is 0x10. devfn_to_wslot(0x10) == 0x2, and
wslot_to_devfn(0x2) should be 0x10, while it's 0x2 in the current code.
Due to this, hv_eject_device_work() -> pci_get_domain_bus_and_slot()
returns NULL and pci_stop_and_remove_bus_device() is not called.
Later when the real device driver's .remove() is invoked by
hv_pci_remove() -> pci_stop_root_bus(), some warnings can be noticed
because the VM has lost the access to the underlying device at that
time.
Signed-off-by: Jake Oshins <jakeo@microsoft.com>
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Haiyang Zhang <haiyangz@microsoft.com>
CC: K. Y. Srinivasan <kys@microsoft.com>
CC: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/pci/host')
| -rw-r--r-- | drivers/pci/host/pci-hyperv.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/pci/host/pci-hyperv.c b/drivers/pci/host/pci-hyperv.c index 763ff87..61fc349 100644 --- a/drivers/pci/host/pci-hyperv.c +++ b/drivers/pci/host/pci-hyperv.c @@ -130,7 +130,8 @@ union pci_version { */ union win_slot_encoding { struct { - u32 func:8; + u32 dev:5; + u32 func:3; u32 reserved:24; } bits; u32 slot; @@ -483,7 +484,8 @@ static u32 devfn_to_wslot(int devfn) union win_slot_encoding wslot; wslot.slot = 0; - wslot.bits.func = PCI_SLOT(devfn) | (PCI_FUNC(devfn) << 5); + wslot.bits.dev = PCI_SLOT(devfn); + wslot.bits.func = PCI_FUNC(devfn); return wslot.slot; } @@ -501,7 +503,7 @@ static int wslot_to_devfn(u32 wslot) union win_slot_encoding slot_no; slot_no.slot = wslot; - return PCI_DEVFN(0, slot_no.bits.func); + return PCI_DEVFN(slot_no.bits.dev, slot_no.bits.func); } /* |