From patchwork Fri Jan 22 10:43:42 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stanislaw Gruszka X-Patchwork-Id: 369146 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8D8B7C433DB for ; Fri, 22 Jan 2021 10:52:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3C41F230F9 for ; Fri, 22 Jan 2021 10:52:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727474AbhAVKwA (ORCPT ); Fri, 22 Jan 2021 05:52:00 -0500 Received: from mx3.wp.pl ([212.77.101.9]:34324 "EHLO mx3.wp.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726057AbhAVKvc (ORCPT ); Fri, 22 Jan 2021 05:51:32 -0500 X-Greylist: delayed 397 seconds by postgrey-1.27 at vger.kernel.org; Fri, 22 Jan 2021 05:51:31 EST Received: (wp-smtpd smtp.wp.pl 3191 invoked from network); 22 Jan 2021 11:43:43 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=wp.pl; s=1024a; t=1611312223; bh=Hniz8g8ytC6LDKB/ulg7Znii0SXHdowB53vEx5IW4c8=; h=From:To:Cc:Subject; b=SdsyyA9O0woks4n/004WWGFaa+JvQTqaeetVNUXINLVyBxg7nvKiUnObVDlL/Ym4y GN7lSrYq/hiriFfEuAnnL1lSLqU5dui/pAomLwdlEmQTGeZtf0JWO/+dAeIFJNd6wB Rz3KsU91PYBZf+wgOtRu/VEgQlkm8qP8fzaCBgZI= Received: from ip4-46-39-164-203.cust.nbox.cz (HELO localhost) (stf_xl@wp.pl@[46.39.164.203]) (envelope-sender ) by smtp.wp.pl (WP-SMTPD) with ECDHE-RSA-AES256-GCM-SHA384 encrypted SMTP for ; 22 Jan 2021 11:43:43 +0100 From: stf_xl@wp.pl To: linux-usb@vger.kernel.org Cc: linux-wireless@vger.kernel.org, Mathias Nyman , Bernhard Subject: [PATCH] usb, xhci, rt2800usb: do not perform Soft Retry Date: Fri, 22 Jan 2021 11:43:42 +0100 Message-Id: <20210122104342.12451-1-stf_xl@wp.pl> X-Mailer: git-send-email 2.25.4 MIME-Version: 1.0 X-WP-MailID: 3064d5032e842dfcedc2651dbe6c1ee4 X-WP-AV: skaner antywirusowy Poczty Wirtualnej Polski X-WP-SPAM: NO 0000000 [AXPk] Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org From: Stanislaw Gruszka Since f8f80be501aa ("xhci: Use soft retry to recover faster from transaction errors") on some systems rt2800usb devices are unable to operate. Looks that due to firmware or hardware limitations of those devices, they require full recovery from USB Transaction Errors. To avoid the problem add URB transfer flag, that restore pre f8f80be501aa xhci behaviour when the flag is set. For now only add it only to rt2800usb driver. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=202541 Fixes: f8f80be501aa ("xhci: Use soft retry to recover faster from transaction errors") Reported-and-tested-by: Bernhard Bisected-by: Bernhard Signed-off-by: Stanislaw Gruszka --- drivers/net/wireless/ralink/rt2x00/rt2x00usb.c | 3 +++ drivers/usb/core/urb.c | 2 +- drivers/usb/host/xhci-ring.c | 3 ++- include/linux/usb.h | 1 + 4 files changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/ralink/rt2x00/rt2x00usb.c b/drivers/net/wireless/ralink/rt2x00/rt2x00usb.c index e4473a551241..f1d82b3e6bba 100644 --- a/drivers/net/wireless/ralink/rt2x00/rt2x00usb.c +++ b/drivers/net/wireless/ralink/rt2x00/rt2x00usb.c @@ -214,6 +214,7 @@ void rt2x00usb_register_read_async(struct rt2x00_dev *rt2x00dev, usb_fill_control_urb(urb, usb_dev, usb_rcvctrlpipe(usb_dev, 0), (unsigned char *)(&rd->cr), &rd->reg, sizeof(rd->reg), rt2x00usb_register_read_async_cb, rd); + urb->transfer_flags |= URB_SOFT_RETRY_NOT_OK; usb_anchor_urb(urb, rt2x00dev->anchor); if (usb_submit_urb(urb, GFP_ATOMIC) < 0) { usb_unanchor_urb(urb); @@ -323,6 +324,7 @@ static bool rt2x00usb_kick_tx_entry(struct queue_entry *entry, void *data) usb_sndbulkpipe(usb_dev, entry->queue->usb_endpoint), entry->skb->data, length, rt2x00usb_interrupt_txdone, entry); + entry_priv->urb->transfer_flags |= URB_SOFT_RETRY_NOT_OK; status = usb_submit_urb(entry_priv->urb, GFP_ATOMIC); if (status) { @@ -409,6 +411,7 @@ static bool rt2x00usb_kick_rx_entry(struct queue_entry *entry, void *data) usb_rcvbulkpipe(usb_dev, entry->queue->usb_endpoint), entry->skb->data, entry->skb->len, rt2x00usb_interrupt_rxdone, entry); + entry_priv->urb->transfer_flags |= URB_SOFT_RETRY_NOT_OK; status = usb_submit_urb(entry_priv->urb, GFP_ATOMIC); if (status) { diff --git a/drivers/usb/core/urb.c b/drivers/usb/core/urb.c index 357b149b20d3..140bac59dc32 100644 --- a/drivers/usb/core/urb.c +++ b/drivers/usb/core/urb.c @@ -495,7 +495,7 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags) /* Check against a simple/standard policy */ allowed = (URB_NO_TRANSFER_DMA_MAP | URB_NO_INTERRUPT | URB_DIR_MASK | - URB_FREE_BUFFER); + URB_SOFT_RETRY_NOT_OK | URB_FREE_BUFFER); switch (xfertype) { case USB_ENDPOINT_XFER_BULK: case USB_ENDPOINT_XFER_INT: diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index 5677b81c0915..6712e1a7735c 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -2302,7 +2302,8 @@ static int process_bulk_intr_td(struct xhci_hcd *xhci, struct xhci_td *td, remaining = 0; break; case COMP_USB_TRANSACTION_ERROR: - if ((ep_ring->err_count++ > MAX_SOFT_RETRY) || + if (td->urb->transfer_flags & URB_SOFT_RETRY_NOT_OK || + (ep_ring->err_count++ > MAX_SOFT_RETRY) || le32_to_cpu(slot_ctx->tt_info) & TT_SLOT) break; *status = 0; diff --git a/include/linux/usb.h b/include/linux/usb.h index 7d72c4e0713c..dcdac2f03263 100644 --- a/include/linux/usb.h +++ b/include/linux/usb.h @@ -1329,6 +1329,7 @@ extern int usb_disabled(void); #define URB_ISO_ASAP 0x0002 /* iso-only; use the first unexpired * slot in the schedule */ #define URB_NO_TRANSFER_DMA_MAP 0x0004 /* urb->transfer_dma valid on submit */ +#define URB_SOFT_RETRY_NOT_OK 0x0008 /* Avoid XHCI Soft Retry */ #define URB_ZERO_PACKET 0x0040 /* Finish bulk OUT with short packet */ #define URB_NO_INTERRUPT 0x0080 /* HINT: no non-error interrupt * needed */