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drm/hyperv: Unregister pci driver in error path before module unload

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The pci driver must not kept registered if the module is unloaded after
vmbus_driver_register() fails. So check the return value of
vmbus_driver_register() and unregister the pci driver on failure.

Fixes: 76c56a5aff ("drm/hyperv: Add DRM driver for hyperv synthetic video device")
Signed-off-by: Uwe Kleine-König (The Capable Hub) <u.kleine-koenig@baylibre.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Signed-off-by: Hamza Mahfooz <hamzamahfooz@linux.microsoft.com>
Link: https://patch.msgid.link/4b7dbf00ce4ff664b7d5dd74b2f39d8d87c1ade9.1782925276.git.u.kleine-koenig@baylibre.com
This commit is contained in:
Uwe Kleine-König (The Capable Hub) 2026-07-01 19:05:19 +02:00 committed by Hamza Mahfooz
parent b67ac31d7f
commit 8c11cfc8c1
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GPG Key ID: 3D6797D6EE6FCAE2
1 changed files with 5 additions and 1 deletions
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6
drivers/gpu/drm/hyperv/hyperv_drm_drv.c
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@ -249,7 +249,11 @@ static int __init hv_drm_init(void)
if (ret != 0)
return ret;
return vmbus_driver_register(&hv_drm_hv_driver);
ret = vmbus_driver_register(&hv_drm_hv_driver);
if (ret)
pci_unregister_driver(&hv_drm_pci_driver);
return ret;
}
static void __exit hv_drm_exit(void)