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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 v2 1/3] usb: core: hcd: Modularize HCD stop configuration in usb_stop_hcd()
Date: Thu, 26 Aug 2021 16:44:24 +0530 [thread overview]
Message-ID: <20210826111426.751-2-kishon@ti.com> (raw)
In-Reply-To: <20210826111426.751-1-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>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Chris Chiu <chris.chiu@canonical.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..00d35fe1fef0 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 root-hub polling timer and invoke the HCD's ->stop callback.
+ */
+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
next prev parent reply other threads:[~2021-08-26 11:14 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-26 11:14 [PATCH v2 0/3] Fix cold plugged USB device on certain PCIe USB cards Kishon Vijay Abraham I
2021-08-26 11:14 ` Kishon Vijay Abraham I [this message]
2021-08-26 11:14 ` [PATCH v2 2/3] usb: core: hcd: Add support for deferring roothub registration Kishon Vijay Abraham I
2021-08-26 12:47 ` Mathias Nyman
2021-08-26 15:16 ` Alan Stern
2021-08-26 11:14 ` [PATCH v2 3/3] xhci: Set HCD flag to defer primary " Kishon Vijay Abraham I
2021-08-26 12:45 ` Mathias Nyman
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