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Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/pci-driver.c17
-rw-r--r--drivers/pci/quirks.c3
2 files changed, 14 insertions, 6 deletions
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index bb0927de79dd..ea69b4dbab66 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -1164,11 +1164,14 @@ static int pci_pm_runtime_suspend(struct device *dev)
int error;
/*
- * If pci_dev->driver is not set (unbound), the device should
- * always remain in D0 regardless of the runtime PM status
+ * If pci_dev->driver is not set (unbound), we leave the device in D0,
+ * but it may go to D3cold when the bridge above it runtime suspends.
+ * Save its config space in case that happens.
*/
- if (!pci_dev->driver)
+ if (!pci_dev->driver) {
+ pci_save_state(pci_dev);
return 0;
+ }
if (!pm || !pm->runtime_suspend)
return -ENOSYS;
@@ -1216,16 +1219,18 @@ static int pci_pm_runtime_resume(struct device *dev)
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
/*
- * If pci_dev->driver is not set (unbound), the device should
- * always remain in D0 regardless of the runtime PM status
+ * Restoring config space is necessary even if the device is not bound
+ * to a driver because although we left it in D0, it may have gone to
+ * D3cold when the bridge above it runtime suspended.
*/
+ pci_restore_standard_config(pci_dev);
+
if (!pci_dev->driver)
return 0;
if (!pm || !pm->runtime_resume)
return -ENOSYS;
- pci_restore_standard_config(pci_dev);
pci_fixup_device(pci_fixup_resume_early, pci_dev);
pci_enable_wake(pci_dev, PCI_D0, false);
pci_fixup_device(pci_fixup_resume, pci_dev);
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 116127a0accb..929d68f744af 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3896,6 +3896,9 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9182,
/* https://bugzilla.kernel.org/show_bug.cgi?id=42679#c46 */
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x91a0,
quirk_dma_func1_alias);
+/* https://bugzilla.kernel.org/show_bug.cgi?id=42679#c127 */
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9220,
+ quirk_dma_func1_alias);
/* https://bugzilla.kernel.org/show_bug.cgi?id=42679#c49 */
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9230,
quirk_dma_func1_alias);