Signed-off-by: Yu Zhao <yu.zhao@xxxxxxxxx>
Signed-off-by: Dexuan Cui <dexuan.cui@xxxxxxxxx>
---
drivers/pci/quirks.c | 22 ++++++++++++++++++++++
1 files changed, 22 insertions(+), 0 deletions(-)
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index dfc734e..aa5dc79 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -2578,7 +2578,29 @@ void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev)
* reset a single function if other methods (e.g. FLR, PM D0->D3) are
* not available.
*/
+static int reset_intel_generic_dev(struct pci_dev *dev, int probe)
+{
+ int pos;
+
+ /* only implement the function for PCI_CLASS_SERIAL_USB at present */
+ if (dev->class != PCI_CLASS_SERIAL_USB)
+ return -ENOTTY;
+
+ pos = pci_find_capability(dev, PCI_CAP_ID_VNDR);
+ if (!pos)
+ return -ENOTTY;
+
+ if (probe)
+ return 0;
+
+ pci_write_config_byte(dev, pos + 0x4, 1);
+ msleep(100);
+
+ return 0;
+}
+
struct pci_dev_reset_methods pci_dev_reset_methods[] = {
+ { PCI_VENDOR_ID_INTEL, PCI_ANY_ID, reset_intel_generic_dev },
{ 0 }
};
#else
--
1.6.0
--
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