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@rowland.harvard.edu>
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20200914153756.3412156-4-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index 1dc53b1..1580694 100644 (file)
--- 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
@@ -1571,9 +1571,10 @@ 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.
@@ -1583,7 +1584,7 @@ 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);
@@ -1707,11 +1708,10 @@ 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) {
                usb_hcd_alloc_bandwidth(dev, NULL, NULL, NULL);
                usb_enable_lpm(dev);
                mutex_unlock(hcd->bandwidth_mutex);
@@ -2096,10 +2096,10 @@ free_interfaces:
        }
        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.