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usb-skeleton: small update 

o CodingStyle fixes
o Removes trailing spaces
o Do not make not needed initialiation of automatic variables
o Use usb_endpoint_* functions
o If we get an error in the write URB callback print an error message instead
  of a debug one

(Pretty unrelated changes, but spliting this up doesn't pay off as our main
changes are just CodingStyle fixes).

Signed-off-by: Luiz Fernando N. Capitulino <lcapitulino@mandriva.com.br>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Luiz Fernando N. Capitulino 2006-08-14 22:44:29 -03:00 committed by Greg Kroah-Hartman
parent d5cbad4b8b
commit c07045412f
1 changed files with 22 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

50
drivers/usb/usb-skeleton.c
View File

@ -1,5 +1,5 @@
/*
* USB Skeleton driver - 2.1
* USB Skeleton driver - 2.2
*
* Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
*
@ -7,7 +7,7 @@
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, version 2.
*
* This driver is based on the 2.6.3 version of drivers/usb/usb-skeleton.c
* This driver is based on the 2.6.3 version of drivers/usb/usb-skeleton.c
* but has been rewritten to be easier to read and use.
*
*/
@ -32,22 +32,22 @@ static struct usb_device_id skel_table [] = {
{ USB_DEVICE(USB_SKEL_VENDOR_ID, USB_SKEL_PRODUCT_ID) },
{ } /* Terminating entry */
};
MODULE_DEVICE_TABLE (usb, skel_table);
MODULE_DEVICE_TABLE(usb, skel_table);
/* Get a minor range for your devices from the usb maintainer */
#define USB_SKEL_MINOR_BASE 192
/* our private defines. if this grows any larger, use your own .h file */
#define MAX_TRANSFER ( PAGE_SIZE - 512 )
#define MAX_TRANSFER (PAGE_SIZE - 512)
#define WRITES_IN_FLIGHT 8
/* Structure to hold all of our device specific stuff */
struct usb_skel {
struct usb_device * udev; /* the usb device for this device */
struct usb_interface * interface; /* the interface for this device */
struct usb_device *dev; /* the usb device for this device */
struct usb_interface *interface; /* the interface for this device */
struct semaphore limit_sem; /* limiting the number of writes in progress */
unsigned char * bulk_in_buffer; /* the buffer to receive data */
unsigned char *bulk_in_buffer; /* the buffer to receive data */
size_t bulk_in_size; /* the size of the receive buffer */
__u8 bulk_in_endpointAddr; /* the address of the bulk in endpoint */
__u8 bulk_out_endpointAddr; /* the address of the bulk out endpoint */
@ -59,12 +59,12 @@ struct usb_skel {
static struct usb_driver skel_driver;
static void skel_delete(struct kref *kref)
{
{
struct usb_skel *dev = to_skel_dev(kref);
usb_put_dev(dev->udev);
kfree (dev->bulk_in_buffer);
kfree (dev);
kfree(dev->bulk_in_buffer);
kfree(dev);
}
static int skel_open(struct inode *inode, struct file *file)
@ -116,7 +116,7 @@ static int skel_release(struct inode *inode, struct file *file)
static ssize_t skel_read(struct file *file, char *buffer, size_t count, loff_t *ppos)
{
struct usb_skel *dev;
int retval = 0;
int retval;
int bytes_read;
dev = (struct usb_skel *)file->private_data;
@ -154,16 +154,16 @@ static void skel_write_bulk_callback(struct urb *urb, struct pt_regs *regs)
dev = (struct usb_skel *)urb->context;
/* sync/async unlink faults aren't errors */
if (urb->status &&
!(urb->status == -ENOENT ||
if (urb->status &&
!(urb->status == -ENOENT ||
urb->status == -ECONNRESET ||
urb->status == -ESHUTDOWN)) {
dbg("%s - nonzero write bulk status received: %d",
err("%s - nonzero write bulk status received: %d",
__FUNCTION__, urb->status);
}
/* free up our allocated buffer */
usb_buffer_free(urb->dev, urb->transfer_buffer_length,
usb_buffer_free(urb->dev, urb->transfer_buffer_length,
urb->transfer_buffer, urb->transfer_dma);
up(&dev->limit_sem);
}
@ -251,7 +251,7 @@ static const struct file_operations skel_fops = {
.release = skel_release,
};
/*
/*
* usb class driver info in order to get a minor number from the usb core,
* and to have the device registered with the driver core
*/
@ -263,7 +263,7 @@ static struct usb_class_driver skel_class = {
static int skel_probe(struct usb_interface *interface, const struct usb_device_id *id)
{
struct usb_skel *dev = NULL;
struct usb_skel *dev;
struct usb_host_interface *iface_desc;
struct usb_endpoint_descriptor *endpoint;
size_t buffer_size;
@ -272,7 +272,7 @@ static int skel_probe(struct usb_interface *interface, const struct usb_device_i
/* allocate memory for our device state and initialize it */
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (dev == NULL) {
if (!dev) {
err("Out of memory");
goto error;
}
@ -290,10 +290,7 @@ static int skel_probe(struct usb_interface *interface, const struct usb_device_i
endpoint = &iface_desc->endpoint[i].desc;
if (!dev->bulk_in_endpointAddr &&
((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
== USB_DIR_IN) &&
((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
== USB_ENDPOINT_XFER_BULK)) {
usb_endpoint_is_bulk_in(endpoint)) {
/* we found a bulk in endpoint */
buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
dev->bulk_in_size = buffer_size;
@ -306,10 +303,7 @@ static int skel_probe(struct usb_interface *interface, const struct usb_device_i
}
if (!dev->bulk_out_endpointAddr &&
((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
== USB_DIR_OUT) &&
((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
== USB_ENDPOINT_XFER_BULK)) {
usb_endpoint_is_bulk_out(endpoint)) {
/* we found a bulk out endpoint */
dev->bulk_out_endpointAddr = endpoint->bEndpointAddress;
}
@ -393,7 +387,7 @@ static void __exit usb_skel_exit(void)
usb_deregister(&skel_driver);
}
module_init (usb_skel_init);
module_exit (usb_skel_exit);
module_init(usb_skel_init);
module_exit(usb_skel_exit);
MODULE_LICENSE("GPL");