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efifb: Check efifb_pci_dev before using it
On some platforms like Hyper-V and RPi4 with UEFI firmware, efifb is not
a PCI device.
So make sure efifb_pci_dev is found before using it.
Fixes: a6c0fd3d5a
("efifb: Ensure graphics device for efifb stays at PCI D0")
BugLink: https://bugs.launchpad.net/bugs/1922403
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210413170508.968148-1-kai.heng.feng@canonical.com
This commit is contained in:
parent
6a3608eae6
commit
d510c88cfb
1 changed files with 4 additions and 2 deletions
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@ -575,7 +575,8 @@ static int efifb_probe(struct platform_device *dev)
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goto err_fb_dealoc;
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}
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fb_info(info, "%s frame buffer device\n", info->fix.id);
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pm_runtime_get_sync(&efifb_pci_dev->dev);
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if (efifb_pci_dev)
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pm_runtime_get_sync(&efifb_pci_dev->dev);
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return 0;
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err_fb_dealoc:
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@ -602,7 +603,8 @@ static int efifb_remove(struct platform_device *pdev)
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unregister_framebuffer(info);
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sysfs_remove_groups(&pdev->dev.kobj, efifb_groups);
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framebuffer_release(info);
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pm_runtime_put(&efifb_pci_dev->dev);
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if (efifb_pci_dev)
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pm_runtime_put(&efifb_pci_dev->dev);
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return 0;
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}
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