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PCI: hv: Add check for hyperv_initialized in init_hv_pci_drv()

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[ 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@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Haiyang Zhang 2021-05-25 16:17:33 -07:00 committed by Greg Kroah-Hartman
parent f5a90d44a1
commit 998d9fefdd
1 changed files with 3 additions and 0 deletions
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3
drivers/pci/controller/pci-hyperv.c
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@ -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);