From: Dexuan Cui <decui@xxxxxxxxxxxxx> Sent: Tuesday, November 19, 2019 11:17 PM > > A VM can have multiple Hyper-V hbus. It's incorrect to set the global > variable 'pci_protocol_version' when *every* hbus is initialized in > hv_pci_protocol_negotiation(). This is not an issue in practice since > every hbus should have the same value of hbus->protocol_version, but > we should make the variable per-hbus, so in case we have busses > with different protocol_versions, the driver can still work correctly. > > Signed-off-by: Dexuan Cui <decui@xxxxxxxxxxxxx> > --- > > changes in v2: Improved the changelog by making it clear that this patch > fixes a potential bug if we have busses with different protocol_versions. > > drivers/pci/controller/pci-hyperv.c | 22 ++++++++++------------ > 1 file changed, 10 insertions(+), 12 deletions(-) > Reviewed-by: Michael Kelley <mikelley@xxxxxxxxxxxxx>
