2 files changed, 13 insertions, 6 deletions

diff --git a/drivers/usb/chipidea/ci_hdrc_pci.c b/drivers/usb/chipidea/ci_hdrc_pci.c
index 241ae3444fde..4df669437211 100644
--- a/drivers/usb/chipidea/ci_hdrc_pci.c
+++ b/drivers/usb/chipidea/ci_hdrc_pci.c
@@ -111,6 +111,9 @@ static void ci_hdrc_pci_remove(struct pci_dev *pdev)
  * PCI device structure
  *
  * Check "pci.h" for details
+ *
+ * Note: ehci-pci driver may try to probe the device first. You have to add an
+ * ID to the bypass_pci_id_table in ehci-pci driver to prevent this.
  */
 static const struct pci_device_id ci_hdrc_pci_id_table[] = {
         {
diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c
index 965202138161..2a5d2fd76040 100644
--- a/drivers/usb/host/ehci-pci.c
+++ b/drivers/usb/host/ehci-pci.c
@@ -42,18 +42,22 @@ static inline bool is_intel_quark_x1000(struct pci_dev *pdev)
                 pdev->device == PCI_DEVICE_ID_INTEL_QUARK_X1000_SOC;
 }
 
-static const struct pci_device_id ci_hdrc_pci_id_table[] = {
-        { PCI_DEVICE(0x153F, 0x1004), },
-        { PCI_DEVICE(0x153F, 0x1006), },
+/*
+ * This is the list of PCI IDs for the devices that have EHCI USB class and
+ * specific drivers for that. One of the example is a ChipIdea device installed
+ * on some Intel MID platforms.
+ */
+static const struct pci_device_id bypass_pci_id_table[] = {
+        /* ChipIdea on Intel MID platform */
         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0811), },
         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0829), },
         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xe006), },
         {}
 };
 
-static inline bool is_ci_hdrc_pci(struct pci_dev *pdev)
+static inline bool is_bypassed_id(struct pci_dev *pdev)
 {
-        return !!pci_match_id(ci_hdrc_pci_id_table, pdev);
+        return !!pci_match_id(bypass_pci_id_table, pdev);
 }
 
 /*
@@ -368,7 +372,7 @@ static const struct ehci_driver_overrides pci_overrides __initconst = {
 
 static int ehci_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 {
-        if (is_ci_hdrc_pci(pdev))
+        if (is_bypassed_id(pdev))
                 return -ENODEV;
         return usb_hcd_pci_probe(pdev, id);
 }