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drm/radeon: check if device is root before getting pci speed caps

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Check if the device is root rather before attempting to see what
speeds the pcie port supports.  Fixes a crash with pci passthrough
in a VM.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=109366
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2019-01-15 12:05:16 -05:00
parent dc14eb12f6
commit afeff4c16e
2 changed files with 6 additions and 4 deletions
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5
drivers/gpu/drm/radeon/ci_dpm.c
View File

@ -5676,7 +5676,7 @@ int ci_dpm_init(struct radeon_device *rdev)
u16 data_offset, size;
u8 frev, crev;
struct ci_power_info *pi;
enum pci_bus_speed speed_cap;
enum pci_bus_speed speed_cap = PCI_SPEED_UNKNOWN;
struct pci_dev *root = rdev->pdev->bus->self;
int ret;
@ -5685,7 +5685,8 @@ int ci_dpm_init(struct radeon_device *rdev)
return -ENOMEM;
rdev->pm.dpm.priv = pi;
speed_cap = pcie_get_speed_cap(root);
if (!pci_is_root_bus(rdev->pdev->bus))
speed_cap = pcie_get_speed_cap(root);
if (speed_cap == PCI_SPEED_UNKNOWN) {
pi->sys_pcie_mask = 0;
} else {

5
drivers/gpu/drm/radeon/si_dpm.c
View File

@ -6899,7 +6899,7 @@ int si_dpm_init(struct radeon_device *rdev)
struct ni_power_info *ni_pi;
struct si_power_info *si_pi;
struct atom_clock_dividers dividers;
enum pci_bus_speed speed_cap;
enum pci_bus_speed speed_cap = PCI_SPEED_UNKNOWN;
struct pci_dev *root = rdev->pdev->bus->self;
int ret;
@ -6911,7 +6911,8 @@ int si_dpm_init(struct radeon_device *rdev)
eg_pi = &ni_pi->eg;
pi = &eg_pi->rv7xx;
speed_cap = pcie_get_speed_cap(root);
if (!pci_is_root_bus(rdev->pdev->bus))
speed_cap = pcie_get_speed_cap(root);
if (speed_cap == PCI_SPEED_UNKNOWN) {
si_pi->sys_pcie_mask = 0;
} else {