From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B8437C04A68 for ; Wed, 27 Jul 2022 17:19:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238643AbiG0RT5 (ORCPT ); Wed, 27 Jul 2022 13:19:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42272 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241793AbiG0RSl (ORCPT ); Wed, 27 Jul 2022 13:18:41 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CA68479EF2; Wed, 27 Jul 2022 09:43:55 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id CA3F9601CE; Wed, 27 Jul 2022 16:43:54 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D31EFC433C1; Wed, 27 Jul 2022 16:43:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1658940234; bh=y884BdKINCrdyRmIMxHI65XF4GdItYKtWbvXi4nbEpE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mCzzMVhEEEKqSoVG7Sn2wYWDFhq7bn9D1ZBgSadoIgyKdbyuGjdJZaOSrzhhQhaHl 9oD8vPvaKArEX9X7tePdc7pBlVSZRaaTcOZpjAqcRNCDBZHd2kbwn9mBYvM3hNKf3S 7gYog8pbW23yfm4/UarjFFwMobxB8LNEZWtpUoiI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Mathias Nyman , Sasha Levin Subject: [PATCH 5.15 153/201] xhci: dbc: create and remove dbc structure in dbgtty driver. Date: Wed, 27 Jul 2022 18:10:57 +0200 Message-Id: <20220727161034.170996847@linuxfoundation.org> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20220727161026.977588183@linuxfoundation.org> References: <20220727161026.977588183@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Mathias Nyman [ Upstream commit 5ce036b98dd3301fc43bb06a6383ef07b6c776bc ] Turn the dbgtty closer to a device driver by allocating the dbc structure in its own xhci_dbc_tty_probe() function, and freeing it in xhci_dbc_tty_remove() Remove xhci_do_dbc_exit() as its no longer needed. allocate and create the dbc strcuture in xhci_dbc_tty_probe() Signed-off-by: Mathias Nyman Link: https://lore.kernel.org/r/20220216095153.1303105-3-mathias.nyman@linux.intel.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/usb/host/xhci-dbgcap.c | 26 +++----------------------- drivers/usb/host/xhci-dbgcap.h | 5 ++++- drivers/usb/host/xhci-dbgtty.c | 22 +++++++++++++++------- 3 files changed, 22 insertions(+), 31 deletions(-) diff --git a/drivers/usb/host/xhci-dbgcap.c b/drivers/usb/host/xhci-dbgcap.c index 6a437862b498..f4da5708a40f 100644 --- a/drivers/usb/host/xhci-dbgcap.c +++ b/drivers/usb/host/xhci-dbgcap.c @@ -914,16 +914,6 @@ static void xhci_dbc_handle_events(struct work_struct *work) mod_delayed_work(system_wq, &dbc->event_work, 1); } -static void xhci_do_dbc_exit(struct xhci_hcd *xhci) -{ - unsigned long flags; - - spin_lock_irqsave(&xhci->lock, flags); - kfree(xhci->dbc); - xhci->dbc = NULL; - spin_unlock_irqrestore(&xhci->lock, flags); -} - static ssize_t dbc_show(struct device *dev, struct device_attribute *attr, char *buf) @@ -984,7 +974,7 @@ static ssize_t dbc_store(struct device *dev, static DEVICE_ATTR_RW(dbc); struct xhci_dbc * -xhci_alloc_dbc(struct device *dev, void __iomem *base) +xhci_alloc_dbc(struct device *dev, void __iomem *base, const struct dbc_driver *driver) { struct xhci_dbc *dbc; int ret; @@ -995,6 +985,7 @@ xhci_alloc_dbc(struct device *dev, void __iomem *base) dbc->regs = base; dbc->dev = dev; + dbc->driver = driver; if (readl(&dbc->regs->control) & DBC_CTRL_DBC_ENABLE) return NULL; @@ -1045,18 +1036,8 @@ int xhci_dbc_init(struct xhci_hcd *xhci) if (xhci->dbc) return -EBUSY; - xhci->dbc = xhci_alloc_dbc(dev, base); - if (!xhci->dbc) - return -ENOMEM; - - ret = xhci_dbc_tty_probe(xhci); - if (ret) - goto init_err2; - - return 0; + ret = xhci_dbc_tty_probe(dev, base + dbc_cap_offs, xhci); -init_err2: - xhci_do_dbc_exit(xhci); return ret; } @@ -1068,7 +1049,6 @@ void xhci_dbc_exit(struct xhci_hcd *xhci) return; xhci_dbc_tty_remove(xhci->dbc); - xhci_dbc_remove(xhci->dbc); spin_lock_irqsave(&xhci->lock, flags); xhci->dbc = NULL; spin_unlock_irqrestore(&xhci->lock, flags); diff --git a/drivers/usb/host/xhci-dbgcap.h b/drivers/usb/host/xhci-dbgcap.h index c70b78d504eb..5d8c7815491c 100644 --- a/drivers/usb/host/xhci-dbgcap.h +++ b/drivers/usb/host/xhci-dbgcap.h @@ -196,8 +196,11 @@ static inline struct dbc_ep *get_out_ep(struct xhci_dbc *dbc) #ifdef CONFIG_USB_XHCI_DBGCAP int xhci_dbc_init(struct xhci_hcd *xhci); void xhci_dbc_exit(struct xhci_hcd *xhci); -int xhci_dbc_tty_probe(struct xhci_hcd *xhci); +int xhci_dbc_tty_probe(struct device *dev, void __iomem *res, struct xhci_hcd *xhci); void xhci_dbc_tty_remove(struct xhci_dbc *dbc); +struct xhci_dbc *xhci_alloc_dbc(struct device *dev, void __iomem *res, + const struct dbc_driver *driver); +void xhci_dbc_remove(struct xhci_dbc *dbc); struct dbc_request *dbc_alloc_request(struct xhci_dbc *dbc, unsigned int direction, gfp_t flags); diff --git a/drivers/usb/host/xhci-dbgtty.c b/drivers/usb/host/xhci-dbgtty.c index eb46e642e87a..18bcc96853ae 100644 --- a/drivers/usb/host/xhci-dbgtty.c +++ b/drivers/usb/host/xhci-dbgtty.c @@ -468,9 +468,9 @@ static const struct dbc_driver dbc_driver = { .disconnect = xhci_dbc_tty_unregister_device, }; -int xhci_dbc_tty_probe(struct xhci_hcd *xhci) +int xhci_dbc_tty_probe(struct device *dev, void __iomem *base, struct xhci_hcd *xhci) { - struct xhci_dbc *dbc = xhci->dbc; + struct xhci_dbc *dbc; struct dbc_port *port; int status; @@ -485,13 +485,22 @@ int xhci_dbc_tty_probe(struct xhci_hcd *xhci) goto out; } - dbc->driver = &dbc_driver; - dbc->priv = port; + dbc_tty_driver->driver_state = port; + + dbc = xhci_alloc_dbc(dev, base, &dbc_driver); + if (!dbc) { + status = -ENOMEM; + goto out2; + } + dbc->priv = port; - dbc_tty_driver->driver_state = port; + /* get rid of xhci once this is a real driver binding to a device */ + xhci->dbc = dbc; return 0; +out2: + kfree(port); out: /* dbc_tty_exit will be called by module_exit() in the future */ dbc_tty_exit(); @@ -506,8 +515,7 @@ void xhci_dbc_tty_remove(struct xhci_dbc *dbc) { struct dbc_port *port = dbc_to_port(dbc); - dbc->driver = NULL; - dbc->priv = NULL; + xhci_dbc_remove(dbc); kfree(port); /* dbc_tty_exit will be called by module_exit() in the future */ -- 2.35.1