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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>,
	Kishon Vijay Abraham I <kishon@ti.com>, <lokeshvutla@ti.com>
Subject: [PATCH 1/3] usb: core: hcd: Modularize HCD stop configuration in usb_stop_hcd()
Date: Wed, 25 Aug 2021 16:21:30 +0530	[thread overview]
Message-ID: <20210825105132.10420-2-kishon@ti.com> (raw)
In-Reply-To: <20210825105132.10420-1-kishon@ti.com>

No functional change. Since configuration to stop HCD is invoked from
multiple places, group all of them in usb_stop_hcd().

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
 drivers/usb/core/hcd.c | 39 ++++++++++++++++++++++-----------------
 1 file changed, 22 insertions(+), 17 deletions(-)

diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 0f8b7c93310e..775f0456f0ad 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -2760,6 +2760,26 @@ static void usb_put_invalidate_rhdev(struct usb_hcd *hcd)
 	usb_put_dev(rhdev);
 }
 
+/**
+ * usb_stop_hcd - Halt the HCD
+ * @hcd: the usb_hcd that has to be halted
+ *
+ * Stop the timer and invoke ->stop() callback on the HCD
+ */
+static void usb_stop_hcd(struct usb_hcd *hcd)
+{
+	hcd->rh_pollable = 0;
+	clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
+	del_timer_sync(&hcd->rh_timer);
+
+	hcd->driver->stop(hcd);
+	hcd->state = HC_STATE_HALT;
+
+	/* In case the HCD restarted the timer, stop it again. */
+	clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
+	del_timer_sync(&hcd->rh_timer);
+}
+
 /**
  * usb_add_hcd - finish generic HCD structure initialization and register
  * @hcd: the usb_hcd structure to initialize
@@ -2946,13 +2966,7 @@ int usb_add_hcd(struct usb_hcd *hcd,
 	return retval;
 
 err_register_root_hub:
-	hcd->rh_pollable = 0;
-	clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
-	del_timer_sync(&hcd->rh_timer);
-	hcd->driver->stop(hcd);
-	hcd->state = HC_STATE_HALT;
-	clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
-	del_timer_sync(&hcd->rh_timer);
+	usb_stop_hcd(hcd);
 err_hcd_driver_start:
 	if (usb_hcd_is_primary_hcd(hcd) && hcd->irq > 0)
 		free_irq(irqnum, hcd);
@@ -3022,16 +3036,7 @@ void usb_remove_hcd(struct usb_hcd *hcd)
 	 * interrupt occurs), but usb_hcd_poll_rh_status() won't invoke
 	 * the hub_status_data() callback.
 	 */
-	hcd->rh_pollable = 0;
-	clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
-	del_timer_sync(&hcd->rh_timer);
-
-	hcd->driver->stop(hcd);
-	hcd->state = HC_STATE_HALT;
-
-	/* In case the HCD restarted the timer, stop it again. */
-	clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
-	del_timer_sync(&hcd->rh_timer);
+	usb_stop_hcd(hcd);
 
 	if (usb_hcd_is_primary_hcd(hcd)) {
 		if (hcd->irq > 0)
-- 
2.17.1


  reply	other threads:[~2021-08-25 10:51 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-25 10:51 [PATCH 0/3] Fix cold plugged USB device on certain PCIe USB cards Kishon Vijay Abraham I
2021-08-25 10:51 ` Kishon Vijay Abraham I [this message]
2021-08-25 14:45   ` [PATCH 1/3] usb: core: hcd: Modularize HCD stop configuration in usb_stop_hcd() Alan Stern
2021-08-25 10:51 ` [PATCH 2/3] usb: core: hcd: Add support for deferring roothub registration Kishon Vijay Abraham I
2021-08-25 14:52   ` Alan Stern
2021-08-25 10:51 ` [PATCH 3/3] xhci: Set HCD flag to defer primary " Kishon Vijay Abraham I
2021-08-25 14:46   ` Kishon Vijay Abraham I

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