net: usb: kaweth: Replace kaweth_control() with usb_control_msg()

kaweth_control() is almost the same as usb_control_msg() except for the
memory allocation mode (GFP_ATOMIC vs GFP_NOIO) and the in_interrupt()
check.

All the invocations of kaweth_control() are within the probe function in
fully preemtible context so there is no reason to use atomic allocations,
GFP_NOIO which is used by usb_control_msg() is perfectly fine.

Replace kaweth_control() invocations from probe with usb_control_msg().

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/usb/kaweth.c b/drivers/net/usb/kaweth.c
index ed01dc964c99d727d7a04269723bd293452c2ddd..25eeb15104ee82d47fb049fd422c2a08b23d7397 100644 (file)
--- a/drivers/net/usb/kaweth.c
+++ b/drivers/net/usb/kaweth.c
@@ -282,19 +282,13 @@ static int kaweth_control(struct kaweth_device *kaweth,
  ****************************************************************/
 static int kaweth_read_configuration(struct kaweth_device *kaweth)
 {
-       int retval;
-
-       retval = kaweth_control(kaweth,
-                               usb_rcvctrlpipe(kaweth->dev, 0),
+       return usb_control_msg(kaweth->dev, usb_rcvctrlpipe(kaweth->dev, 0),
                                KAWETH_COMMAND_GET_ETHERNET_DESC,
                                USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
-                               0,
-                               0,
-                               (void *)&kaweth->configuration,
+                               0, 0,
+                               &kaweth->configuration,
                                sizeof(kaweth->configuration),
                                KAWETH_CONTROL_TIMEOUT);
-
-       return retval;
 }
 
 /****************************************************************
@@ -302,21 +296,14 @@ static int kaweth_read_configuration(struct kaweth_device *kaweth)
  ****************************************************************/
 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
 {
-       int retval;
-
        netdev_dbg(kaweth->net, "Setting URB size to %d\n", (unsigned)urb_size);
 
-       retval = kaweth_control(kaweth,
-                               usb_sndctrlpipe(kaweth->dev, 0),
-                               KAWETH_COMMAND_SET_URB_SIZE,
-                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
-                               urb_size,
-                               0,
-                               (void *)&kaweth->scratch,
-                               0,
-                               KAWETH_CONTROL_TIMEOUT);
-
-       return retval;
+       return usb_control_msg(kaweth->dev, usb_sndctrlpipe(kaweth->dev, 0),
+                              KAWETH_COMMAND_SET_URB_SIZE,
+                              USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
+                              urb_size, 0,
+                              &kaweth->scratch, 0,
+                              KAWETH_CONTROL_TIMEOUT);
 }
 
 /****************************************************************
@@ -324,21 +311,14 @@ static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
  ****************************************************************/
 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
 {
-       int retval;
-
        netdev_dbg(kaweth->net, "Set SOFS wait to %d\n", (unsigned)sofs_wait);
 
-       retval = kaweth_control(kaweth,
-                               usb_sndctrlpipe(kaweth->dev, 0),
-                               KAWETH_COMMAND_SET_SOFS_WAIT,
-                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
-                               sofs_wait,
-                               0,
-                               (void *)&kaweth->scratch,
-                               0,
-                               KAWETH_CONTROL_TIMEOUT);
-
-       return retval;
+       return usb_control_msg(kaweth->dev, usb_sndctrlpipe(kaweth->dev, 0),
+                              KAWETH_COMMAND_SET_SOFS_WAIT,
+                              USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
+                              sofs_wait, 0,
+                              &kaweth->scratch, 0,
+                              KAWETH_CONTROL_TIMEOUT);
 }
 
 /****************************************************************
@@ -347,22 +327,15 @@ static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
 static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
                                     __u16 receive_filter)
 {
-       int retval;
-
        netdev_dbg(kaweth->net, "Set receive filter to %d\n",
                   (unsigned)receive_filter);
 
-       retval = kaweth_control(kaweth,
-                               usb_sndctrlpipe(kaweth->dev, 0),
-                               KAWETH_COMMAND_SET_PACKET_FILTER,
-                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
-                               receive_filter,
-                               0,
-                               (void *)&kaweth->scratch,
-                               0,
-                               KAWETH_CONTROL_TIMEOUT);
-
-       return retval;
+       return usb_control_msg(kaweth->dev, usb_sndctrlpipe(kaweth->dev, 0),
+                              KAWETH_COMMAND_SET_PACKET_FILTER,
+                              USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
+                              receive_filter, 0,
+                              &kaweth->scratch, 0,
+                              KAWETH_CONTROL_TIMEOUT);
 }
 
 /****************************************************************
@@ -407,14 +380,11 @@ static int kaweth_download_firmware(struct kaweth_device *kaweth,
                   kaweth->firmware_buf, kaweth);
        netdev_dbg(kaweth->net, "Firmware length: %d\n", data_len);
 
-       return kaweth_control(kaweth,
-                             usb_sndctrlpipe(kaweth->dev, 0),
+       return usb_control_msg(kaweth->dev, usb_sndctrlpipe(kaweth->dev, 0),
                              KAWETH_COMMAND_SCAN,
                              USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
-                             0,
-                             0,
-                             (void *)kaweth->firmware_buf,
-                             data_len,
+                             0, 0,
+                             kaweth->firmware_buf, data_len,
                              KAWETH_CONTROL_TIMEOUT);
 }
 
@@ -433,15 +403,12 @@ static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
        kaweth->firmware_buf[6] = 0x00;
        kaweth->firmware_buf[7] = 0x00;
 
-       return kaweth_control(kaweth,
-                             usb_sndctrlpipe(kaweth->dev, 0),
-                             KAWETH_COMMAND_SCAN,
-                             USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
-                             0,
-                             0,
-                             (void *)kaweth->firmware_buf,
-                             8,
-                             KAWETH_CONTROL_TIMEOUT);
+       return usb_control_msg(kaweth->dev, usb_sndctrlpipe(kaweth->dev, 0),
+                              KAWETH_COMMAND_SCAN,
+                              USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
+                              0, 0,
+                              (void *)kaweth->firmware_buf, 8,
+                              KAWETH_CONTROL_TIMEOUT);
 }
 
 /****************************************************************