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drm/radeon: Bail earlier when radeon.cik_/si_support=0 is passed

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Bail from the pci_driver probe function instead of from the drm_driver
load function.

This avoid /dev/dri/card0 temporarily getting registered and then
unregistered again, sending unwanted add / remove udev events to
userspace.

Specifically this avoids triggering the (userspace) bug fixed by this
plymouth merge-request:
https://gitlab.freedesktop.org/plymouth/plymouth/merge_requests/59

Note that despite that being an userspace bug, not sending unnecessary
udev events is a good idea in general.

BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1490490
Reviewed-by: Michel Dänzer <mdaenzer@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Hans de Goede
2019-09-07 22:32:38 +02:00
committed by Alex Deucher
parent c02d6a1613
commit 9dbc88d013
2 changed files with 31 additions and 25 deletions
Download Patch File Download Diff File Expand all files Collapse all files

31
drivers/gpu/drm/radeon/radeon_drv.c
View File

@@ -323,8 +323,39 @@ bool radeon_device_is_virtual(void);
static int radeon_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
unsigned long flags = 0;
int ret;
if (!ent)
return -ENODEV; /* Avoid NULL-ptr deref in drm_get_pci_dev */
flags = ent->driver_data;
if (!radeon_si_support) {
switch (flags & RADEON_FAMILY_MASK) {
case CHIP_TAHITI:
case CHIP_PITCAIRN:
case CHIP_VERDE:
case CHIP_OLAND:
case CHIP_HAINAN:
dev_info(&pdev->dev,
"SI support disabled by module param\n");
return -ENODEV;
}
}
if (!radeon_cik_support) {
switch (flags & RADEON_FAMILY_MASK) {
case CHIP_KAVERI:
case CHIP_BONAIRE:
case CHIP_HAWAII:
case CHIP_KABINI:
case CHIP_MULLINS:
dev_info(&pdev->dev,
"CIK support disabled by module param\n");
return -ENODEV;
}
}
if (vga_switcheroo_client_probe_defer(pdev))
return -EPROBE_DEFER;