diff options
| author | Nirmal Patel <nirmal.patel@linux.intel.com> | 2023-02-24 23:28:11 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-07-19 17:21:34 +0300 |
| commit | c52502b67424a076cbb92e589de5201c61c3086d (patch) | |
| tree | cbd05bc97786fe5ea2c01503b89e40da4d282314 /drivers/pci/controller/vmd.c | |
| parent | ebafa12c8f233af5ec55949f4272952369f23297 (diff) | |
| download | linux-c52502b67424a076cbb92e589de5201c61c3086d.tar.xz | |
PCI: vmd: Reset VMD config register between soft reboots
[ Upstream commit b61cf04c49c3dfa70a0d6725d3eb40bf9b35cf71 ]
VMD driver can disable or enable MSI remapping by changing
VMCONFIG_MSI_REMAP register. This register needs to be set to the
default value during soft reboots. Drives failed to enumerate
when Windows boots after performing a soft reboot from Linux.
Windows doesn't support MSI remapping disable feature and stale
register value hinders Windows VMD driver initialization process.
Adding vmd_shutdown function to make sure to set the VMCONFIG
register to the default value.
Link: https://lore.kernel.org/r/20230224202811.644370-1-nirmal.patel@linux.intel.com
Fixes: ee81ee84f873 ("PCI: vmd: Disable MSI-X remapping when possible")
Signed-off-by: Nirmal Patel <nirmal.patel@linux.intel.com>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Reviewed-by: Jon Derrick <jonathan.derrick@linux.dev>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/pci/controller/vmd.c')
| -rw-r--r-- | drivers/pci/controller/vmd.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/pci/controller/vmd.c b/drivers/pci/controller/vmd.c index 769eedeb8802..50a187a29a1d 100644 --- a/drivers/pci/controller/vmd.c +++ b/drivers/pci/controller/vmd.c @@ -979,6 +979,13 @@ static void vmd_remove(struct pci_dev *dev) ida_simple_remove(&vmd_instance_ida, vmd->instance); } +static void vmd_shutdown(struct pci_dev *dev) +{ + struct vmd_dev *vmd = pci_get_drvdata(dev); + + vmd_remove_irq_domain(vmd); +} + #ifdef CONFIG_PM_SLEEP static int vmd_suspend(struct device *dev) { @@ -1056,6 +1063,7 @@ static struct pci_driver vmd_drv = { .id_table = vmd_ids, .probe = vmd_probe, .remove = vmd_remove, + .shutdown = vmd_shutdown, .driver = { .pm = &vmd_dev_pm_ops, }, |