diff mbox series

[v2] USB: ehci: reopen solution for Synopsys HC bug

Message ID 1591080772-45562-1-git-send-email-liulongfang@huawei.com (mailing list archive)
State Superseded
Headers show
Series [v2] USB: ehci: reopen solution for Synopsys HC bug | expand

Commit Message

liulongfang June 2, 2020, 6:52 a.m. UTC 
A Synopsys USB2.0 core used in Huawei Kunpeng920 SoC has a bug which
might cause the host controller not issuing ping.

The detailed description and solution:
Link: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git/commit/?id=2f7ac6c199978d0a0e407a12534201aa675a6482

Signed-off-by: Longfang Liu <liulongfang@huawei.com>
Reviewed-by: Yicong Yang <yangyicong@hisilicon.com>
---

 drivers/usb/host/ehci-pci.c | 7 +++++++
 1 file changed, 7 insertions(+)
diff mbox series

Patch

diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c
index 1a48ab1..7ff2cbd 100644
--- a/drivers/usb/host/ehci-pci.c
+++ b/drivers/usb/host/ehci-pci.c
@@ -216,6 +216,13 @@  static int ehci_pci_setup(struct usb_hcd *hcd)
 		ehci_info(ehci, "applying MosChip frame-index workaround\n");
 		ehci->frame_index_bug = 1;
 		break;
+	case PCI_VENDOR_ID_HUAWEI:
+		/* Synopsys HC bug */
+		if (pdev->device == 0xa239) {
+			ehci_info(ehci, "applying Synopsys HC workaround\n");
+			ehci->has_synopsys_hc_bug = 1;
+		}
+		break;
 	}
 
 	/* optional debug port, normally in the first BAR */