| Message ID | 1617889760-17733-3-git-send-email-liulongfang@huawei.com |
|---|---|
| State | New |
| Headers | show |
| Series | USB:ehci:fix the no SRBN register problem | expand |
diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c index 534e906..7bd075c 100644 --- a/drivers/usb/host/ehci-pci.c +++ b/drivers/usb/host/ehci-pci.c @@ -53,6 +53,8 @@ static const struct usb_nosbrn_whitelist_entry { } usb_nosbrn_whitelist[] = { /* STMICRO ConneXT has no sbrn register */ {PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_USB_HOST}, + /* HUAWEI Kunpeng920 HiSilicon USB EHCI has no sbrn register */ + {PCI_VENDOR_ID_HUAWEI, 0xa239}, /* End of list */ {NULL, NULL} };
Kunpeng920's EHCI controller does not have SBRN register. Reading the SBRN register when the controller driver is initialized will get 0. When rebooting the EHCI driver, ehci_shutdown() will be called. if the sbrn flag is 0, ehci_shutdown() will return directly. The sbrn flag being 0 will cause the EHCI interrupt signal to not be turned off after reboot. this interrupt that is not closed will cause an exception to the device sharing the interrupt. Therefore, the EHCI controller of kunpeng920 needs to be added to the whitelist without SBRN register. Signed-off-by: Longfang Liu <liulongfang@huawei.com> --- drivers/usb/host/ehci-pci.c | 2 ++ 1 file changed, 2 insertions(+)