| Message ID | 1617937215-39035-3-git-send-email-liulongfang@huawei.com (mailing list archive) |
|---|---|
| State | New, archived |
| 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 f7f3156..3690e62 100644 --- a/drivers/usb/host/ehci-pci.c +++ b/drivers/usb/host/ehci-pci.c @@ -53,6 +53,8 @@ static const struct ehci_nosbrn { } ehci_nosbrn_table[] = { /* 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}, {}, };
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(+)