linux-kernel - [PATCH] fix: add XHCI_SPURIOUS_SUCCESS to ASM1042 despite being a V0.96 controller

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Message-Id: <20220925172236.2288-1-jens.glathe@oldschoolsolutions.biz>
Date:   Sun, 25 Sep 2022 19:22:37 +0200
From:   Jens Glathe <jens.glathe@...schoolsolutions.biz>
To:     mathias.nyman@...el.com
Cc:     gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Jens Glathe <jens.glathe@...schoolsolutions.biz>
Subject: [PATCH] fix: add XHCI_SPURIOUS_SUCCESS to ASM1042 despite being a V0.96 controller

only if it reports as a V0.96 XHCI controller. Appears to fix the errors
"xhci_hcd <address>; ERROR Transfer event TRB DMA ptr not part of
current TD ep_index 2 comp_code 13" that appear spuriously (or pretty
often) when using a r8152 USB3 ethernet adapter with integrated hub.

Signed-off-by: Jens Glathe <jens.glathe@...schoolsolutions.biz>
---
 drivers/usb/host/xhci-pci.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index dce6c0ec8d34..d1b8e7148dd1 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -306,8 +306,12 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
 	}
 
 	if (pdev->vendor == PCI_VENDOR_ID_ASMEDIA &&
-		pdev->device == PCI_DEVICE_ID_ASMEDIA_1042_XHCI)
+		pdev->device == PCI_DEVICE_ID_ASMEDIA_1042_XHCI) {
+		/* try to tame the ASMedia 1042 controller which is 0.96 */
+		if (xhci->hci_version == 0x96)
+			xhci->quirks |= XHCI_SPURIOUS_SUCCESS;
 		xhci->quirks |= XHCI_BROKEN_STREAMS;
+	}
 	if (pdev->vendor == PCI_VENDOR_ID_ASMEDIA &&
 		pdev->device == PCI_DEVICE_ID_ASMEDIA_1042A_XHCI) {
 		xhci->quirks |= XHCI_TRUST_TX_LENGTH;
-- 
2.25.1

---
Hi there, a "try again" with git send-email and the corrected patch. Hope this works now.

with best regards

Jens Glathe