LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Kishon Vijay Abraham I <kishon@ti.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Mathias Nyman <mathias.nyman@intel.com>,
	Alan Stern <stern@rowland.harvard.edu>
Cc: <linux-usb@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	<chris.chiu@canonical.com>
Subject: [RFC PATCH 4/5] usb: core: hcd-pci: Let usb_hcd_pci_probe() indicate if RH has to be registered
Date: Tue, 24 Aug 2021 16:23:01 +0530	[thread overview]
Message-ID: <20210824105302.25382-5-kishon@ti.com> (raw)
In-Reply-To: <20210824105302.25382-1-kishon@ti.com>

No functional change. Add __usb_hcd_pci_probe() which takes "register_hub"
flag that indicates if roothub (RH) has to be registered or not. This is in
preparation for allowing xhci-pci to register roothub after the shared hcd
is created. The interface for usb_hcd_pci_probe() is not modified to make
sure there are minimal code changes.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
 drivers/usb/core/hcd-pci.c | 11 ++++++-----
 include/linux/usb/hcd.h    |  8 +++++---
 2 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c
index d630cccd2e6e..65c1f9aee4d1 100644
--- a/drivers/usb/core/hcd-pci.c
+++ b/drivers/usb/core/hcd-pci.c
@@ -160,6 +160,7 @@ static void ehci_wait_for_companions(struct pci_dev *pdev, struct usb_hcd *hcd,
  * @dev: USB Host Controller being probed
  * @id: pci hotplug id connecting controller to HCD framework
  * @driver: USB HC driver handle
+ * @register_hub: Flag to indicate of roothub has to be registered or not
  *
  * Context: task context, might sleep
  *
@@ -171,8 +172,8 @@ static void ehci_wait_for_companions(struct pci_dev *pdev, struct usb_hcd *hcd,
  *
  * Return: 0 if successful.
  */
-int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id,
-		      const struct hc_driver *driver)
+int __usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id,
+			const struct hc_driver *driver, bool register_hub)
 {
 	struct usb_hcd		*hcd;
 	int			retval;
@@ -262,7 +263,7 @@ int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id,
 		down_write(&companions_rwsem);
 		dev_set_drvdata(&dev->dev, hcd);
 		for_each_companion(dev, hcd, ehci_pre_add);
-		retval = usb_add_hcd(hcd, hcd_irq, IRQF_SHARED);
+		retval = __usb_add_hcd(hcd, hcd_irq, IRQF_SHARED, register_hub);
 		if (retval != 0)
 			dev_set_drvdata(&dev->dev, NULL);
 		for_each_companion(dev, hcd, ehci_post_add);
@@ -270,7 +271,7 @@ int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id,
 	} else {
 		down_read(&companions_rwsem);
 		dev_set_drvdata(&dev->dev, hcd);
-		retval = usb_add_hcd(hcd, hcd_irq, IRQF_SHARED);
+		retval = __usb_add_hcd(hcd, hcd_irq, IRQF_SHARED, register_hub);
 		if (retval != 0)
 			dev_set_drvdata(&dev->dev, NULL);
 		else
@@ -296,7 +297,7 @@ int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id,
 	dev_err(&dev->dev, "init %s fail, %d\n", pci_name(dev), retval);
 	return retval;
 }
-EXPORT_SYMBOL_GPL(usb_hcd_pci_probe);
+EXPORT_SYMBOL_GPL(__usb_hcd_pci_probe);
 
 
 /* may be called without controller electrically present */
diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h
index 2c99cfe20531..49c1a8d56b2c 100644
--- a/include/linux/usb/hcd.h
+++ b/include/linux/usb/hcd.h
@@ -493,14 +493,16 @@ static inline int ehset_single_step_set_feature(struct usb_hcd *hcd, int port)
 #ifdef CONFIG_USB_PCI
 struct pci_dev;
 struct pci_device_id;
-extern int usb_hcd_pci_probe(struct pci_dev *dev,
-			     const struct pci_device_id *id,
-			     const struct hc_driver *driver);
+extern int __usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id,
+			       const struct hc_driver *driver, bool register_hub);
 extern void usb_hcd_pci_remove(struct pci_dev *dev);
 extern void usb_hcd_pci_shutdown(struct pci_dev *dev);
 
 extern int usb_hcd_amd_remote_wakeup_quirk(struct pci_dev *dev);
 
+#define usb_hcd_pci_probe(dev, id, driver) \
+	__usb_hcd_pci_probe(dev, id, driver, true)
+
 #ifdef CONFIG_PM
 extern const struct dev_pm_ops usb_hcd_pci_pm_ops;
 #endif
-- 
2.17.1


  parent reply	other threads:[~2021-08-24 10:53 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-24 10:52 [RFC PATCH 0/5] Fix cold plugged USB device on certain PCIe USB cards Kishon Vijay Abraham I
2021-08-24 10:52 ` [RFC PATCH 1/5] usb: core: hcd: Modularize HCD stop configuration in usb_stop_hcd() Kishon Vijay Abraham I
2021-08-24 13:06   ` Greg Kroah-Hartman
2021-08-24 15:18     ` Kishon Vijay Abraham I
2021-08-26 11:14       ` Greg Kroah-Hartman
2021-08-24 10:52 ` [RFC PATCH 2/5] usb: core: hcd: Let usb_add_hcd() indicate if roothub has to be registered Kishon Vijay Abraham I
2021-08-24 13:08   ` Greg Kroah-Hartman
2021-08-24 14:56   ` Alan Stern
2021-08-24 10:53 ` [RFC PATCH 3/5] usb: core: hcd: Add support for registering secondary RH along with primary HCD Kishon Vijay Abraham I
2021-08-24 11:55   ` Mathias Nyman
2021-08-24 10:53 ` Kishon Vijay Abraham I [this message]
2021-08-24 13:09   ` [RFC PATCH 4/5] usb: core: hcd-pci: Let usb_hcd_pci_probe() indicate if RH has to be registered Greg Kroah-Hartman
2021-08-24 10:53 ` [RFC PATCH 5/5] xhci-pci: Use flag to not register roothub while adding primary HCD Kishon Vijay Abraham I

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210824105302.25382-5-kishon@ti.com \
    --to=kishon@ti.com \
    --cc=chris.chiu@canonical.com \
    --cc=gregkh@linuxfoundation.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-usb@vger.kernel.org \
    --cc=mathias.nyman@intel.com \
    --cc=stern@rowland.harvard.edu \
    --subject='Re: [RFC PATCH 4/5] usb: core: hcd-pci: Let usb_hcd_pci_probe() indicate if RH has to be registered' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).