From: Haiyang Zhang haiyangz@microsoft.com
[ Upstream commit 7d815f4afa87f2032b650ae1bba7534b550a6b8b ]
Add check for hv_is_hyperv_initialized() at the top of init_hv_pci_drv(), so if the pci-hyperv driver is force-loaded on non Hyper-V platforms, the init_hv_pci_drv() will exit immediately, without any side effects, like assignments to hvpci_block_ops, etc.
Signed-off-by: Haiyang Zhang haiyangz@microsoft.com Reported-and-tested-by: Mohammad Alqayeem mohammad.alqyeem@nutanix.com Reviewed-by: Wei Liu wei.liu@kernel.org Link: https://lore.kernel.org/r/1621984653-1210-1-git-send-email-haiyangz@microsof... Signed-off-by: Wei Liu wei.liu@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/pci/controller/pci-hyperv.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/pci/controller/pci-hyperv.c b/drivers/pci/controller/pci-hyperv.c index 27a17a1e4a7c..7479edf3676c 100644 --- a/drivers/pci/controller/pci-hyperv.c +++ b/drivers/pci/controller/pci-hyperv.c @@ -3480,6 +3480,9 @@ static void __exit exit_hv_pci_drv(void)
static int __init init_hv_pci_drv(void) { + if (!hv_is_hyperv_initialized()) + return -ENODEV; + /* Set the invalid domain number's bit, so it will not be used */ set_bit(HVPCI_DOM_INVALID, hvpci_dom_map);