From patchwork Thu Feb 8 23:13:23 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wesley Cheng X-Patchwork-Id: 13550706 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3EF345026B; Thu, 8 Feb 2024 23:14:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.180.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707434086; cv=none; b=Sc5HlLA9deFZ1nclbBQl3AvV6VdXXmCV3yTyFGgaFLAMowohZNnRN2ZbD/PXER4CC7ri5P7CoQMFq//e9uycDhuaZZg8CcwwnOVxSyzdi/CGyFq5SPPKImKPT5YiikJKiWtKMd4Y2D6WdPLP2vvHenSIiKrjpHEC2rUcPJ2SWIA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707434086; c=relaxed/simple; bh=Jk0LMWaa/SpQYHxNARX1Jnkq4LIW4HOuymWLQdv26ls=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Fp913WSRaSY/blxhXeFN35CE7p0SgcXfUFLdKMENTvUcUehq1Vp9TzYwsJEfI78/cWQbqPSR3WGH6C0iMrcIWDEfgAEH9+Igu5ZOEpkbZM6KnUAkHgeCaUnfvq643PV6HMsU3CkdAjogRqc/ahQ0YCBW/Po13xkNXlvouk0XGec= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com; spf=pass smtp.mailfrom=quicinc.com; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b=eRIdNiTm; arc=none smtp.client-ip=205.220.180.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=quicinc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="eRIdNiTm" Received: from pps.filterd (m0279871.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.24/8.17.1.24) with ESMTP id 418KFtpA005718; Thu, 8 Feb 2024 23:14:20 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-type; s=qcppdkim1; bh=KLjeKKCPmPfKQrXevx6P EsBCLzPg435el7fcR46yWyc=; b=eRIdNiTmMl6+jbowa4xC8fs7fbsBMAPyjJ2Q 9/+UdM1KNgJ537SBDdDQpxgtuYWWXYFM2wu2Bdm86mg3SuWUv1MmuGER2Xr8GdPM o6sA0O9DhxAaXeP0b88hc7IW9bL+badHvp8z2FCw2jYwvHLUOopBHzoUfPjJKDXd RtKVs7Nn951/fwcNfqtKsSAn0y53Zgp7n2E2fqLFu0e5F+nDZWtwnQW/+pdUiT/t AiFJ5ft2nBhqSLb+AkrSEROcnk7IYDwzr56zXXZlIUiVKKILjnTNWNWe5fTYJFur a6mINJpToY53LJOWzz9emGub5sPsmWFbt9dhggP98Hrg+InJow== Received: from nalasppmta01.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3w4hhkbaj2-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 08 Feb 2024 23:14:19 +0000 (GMT) Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 418NEIdp005532 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 8 Feb 2024 23:14:18 GMT Received: from hu-wcheng-lv.qualcomm.com (10.49.16.6) by nalasex01b.na.qualcomm.com (10.47.209.197) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Thu, 8 Feb 2024 15:14:18 -0800 From: Wesley Cheng To: , , , , , , , , , , , , , , CC: , , , , , , , Mathias Nyman , Wesley Cheng Subject: [PATCH v14 10/53] xhci: Don't check if the event ring is valid before every event TRB Date: Thu, 8 Feb 2024 15:13:23 -0800 Message-ID: <20240208231406.27397-11-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20240208231406.27397-1-quic_wcheng@quicinc.com> References: <20240208231406.27397-1-quic_wcheng@quicinc.com> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: nalasex01c.na.qualcomm.com (10.47.97.35) To nalasex01b.na.qualcomm.com (10.47.209.197) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: 93zJEfuOBtSwavi2uQlPONvU6kF3CJUY X-Proofpoint-GUID: 93zJEfuOBtSwavi2uQlPONvU6kF3CJUY X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-02-08_11,2024-02-08_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 mlxlogscore=477 spamscore=0 adultscore=0 phishscore=0 mlxscore=0 malwarescore=0 lowpriorityscore=0 clxscore=1015 impostorscore=0 bulkscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2401310000 definitions=main-2402080131 From: Mathias Nyman Check if the event ring exists and is valid once when the event handler is called, not before every individual event TRB. At this point the interrupter is valid, so no need to check that. Signed-off-by: Mathias Nyman Signed-off-by: Wesley Cheng --- drivers/usb/host/xhci-ring.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index 48388bc16b24..293239d8fab0 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -2922,12 +2922,6 @@ static int xhci_handle_event(struct xhci_hcd *xhci, struct xhci_interrupter *ir) union xhci_trb *event; u32 trb_type; - /* Event ring hasn't been allocated yet. */ - if (!ir || !ir->event_ring || !ir->event_ring->dequeue) { - xhci_err(xhci, "ERROR interrupter not ready\n"); - return -ENOMEM; - } - event = ir->event_ring->dequeue; if (!unhandled_event_trb(ir->event_ring)) @@ -3031,6 +3025,12 @@ static int xhci_handle_events(struct xhci_hcd *xhci, struct xhci_interrupter *ir xhci_clear_interrupt_pending(xhci, ir); + /* Event ring hasn't been allocated yet. */ + if (!ir->event_ring || !ir->event_ring->dequeue) { + xhci_err(xhci, "ERROR interrupter event ring not ready\n"); + return -ENOMEM; + } + if (xhci->xhc_state & XHCI_STATE_DYING || xhci->xhc_state & XHCI_STATE_HALTED) { xhci_dbg(xhci, "xHCI dying, ignoring interrupt. Shouldn't IRQs be disabled?\n");