linux-kernel - [PATCH 03/10] USB: core: message.c: use usb_control_msg

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Date:   Wed,  2 Sep 2020 13:01:05 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     himadrispandya@...il.com, dvyukov@...gle.com,
        linux-usb@...r.kernel.org
Cc:     perex@...ex.cz, tiwai@...e.com, stern@...land.harvard.ed,
        linux-kernel@...r.kernel.org, marcel@...tmann.org,
        johan.hedberg@...il.com, linux-bluetooth@...r.kernel.org,
        alsa-devel@...a-project.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Alan Stern <stern@...land.harvard.edu>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH 03/10] USB: core: message.c: use usb_control_msg_send() in a few places

There are a few calls to usb_control_msg() that can be converted to use
usb_control_msg_send() instead, so do that in order to make the error
checking a bit simpler.

Cc: Alan Stern <stern@...land.harvard.edu>
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: linux-usb@...r.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/usb/core/message.c | 38 +++++++++++++++++++-------------------
 1 file changed, 19 insertions(+), 19 deletions(-)

diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index 6aa49b237717..dfd079485c76 100644
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -1081,7 +1081,7 @@ int usb_set_isoch_delay(struct usb_device *dev)
 	if (dev->speed < USB_SPEED_SUPER)
 		return 0;
 
-	return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+	return usb_control_msg_send(dev, 0,
 			USB_REQ_SET_ISOCH_DELAY,
 			USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE,
 			dev->hub_delay, 0, NULL, 0,
@@ -1203,13 +1203,13 @@ int usb_clear_halt(struct usb_device *dev, int pipe)
 	 * (like some ibmcam model 1 units) seem to expect hosts to make
 	 * this request for iso endpoints, which can't halt!
 	 */
-	result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
-		USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT,
-		USB_ENDPOINT_HALT, endp, NULL, 0,
-		USB_CTRL_SET_TIMEOUT);
+	result = usb_control_msg_send(dev, 0,
+				      USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT,
+				      USB_ENDPOINT_HALT, endp, NULL, 0,
+				      USB_CTRL_SET_TIMEOUT);
 
 	/* don't un-halt or force to DATA0 except on success */
-	if (result < 0)
+	if (result)
 		return result;
 
 	/* NOTE:  seems like Microsoft and Apple don't bother verifying
@@ -1558,9 +1558,10 @@ int usb_set_interface(struct usb_device *dev, int interface, int alternate)
 	if (dev->quirks & USB_QUIRK_NO_SET_INTF)
 		ret = -EPIPE;
 	else
-		ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
-				   USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
-				   alternate, interface, NULL, 0, 5000);
+		ret = usb_control_msg_send(dev, 0,
+					   USB_REQ_SET_INTERFACE,
+					   USB_RECIP_INTERFACE, alternate,
+					   interface, NULL, 0, 5000);
 
 	/* 9.4.10 says devices don't need this and are free to STALL the
 	 * request if the interface only has one alternate setting.
@@ -1570,7 +1571,7 @@ int usb_set_interface(struct usb_device *dev, int interface, int alternate)
 			"manual set_interface for iface %d, alt %d\n",
 			interface, alternate);
 		manual = 1;
-	} else if (ret < 0) {
+	} else if (ret) {
 		/* Re-instate the old alt setting */
 		usb_hcd_alloc_bandwidth(dev, NULL, alt, iface->cur_altsetting);
 		usb_enable_lpm(dev);
@@ -1718,11 +1719,10 @@ int usb_reset_configuration(struct usb_device *dev)
 		mutex_unlock(hcd->bandwidth_mutex);
 		return retval;
 	}
-	retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
-			USB_REQ_SET_CONFIGURATION, 0,
-			config->desc.bConfigurationValue, 0,
-			NULL, 0, USB_CTRL_SET_TIMEOUT);
-	if (retval < 0)
+	retval = usb_control_msg_send(dev, 0, USB_REQ_SET_CONFIGURATION, 0,
+				      config->desc.bConfigurationValue, 0,
+				      NULL, 0, USB_CTRL_SET_TIMEOUT);
+	if (retval)
 		goto reset_old_alts;
 	mutex_unlock(hcd->bandwidth_mutex);
 
@@ -2103,10 +2103,10 @@ int usb_set_configuration(struct usb_device *dev, int configuration)
 	}
 	kfree(new_interfaces);
 
-	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
-			      USB_REQ_SET_CONFIGURATION, 0, configuration, 0,
-			      NULL, 0, USB_CTRL_SET_TIMEOUT);
-	if (ret < 0 && cp) {
+	ret = usb_control_msg_send(dev, 0, USB_REQ_SET_CONFIGURATION, 0,
+				   configuration, 0, NULL, 0,
+				   USB_CTRL_SET_TIMEOUT);
+	if (ret && cp) {
 		/*
 		 * All the old state is gone, so what else can we do?
 		 * The device is probably useless now anyway.
-- 
2.28.0