This patch adds poll functionality for end-point 0. This
allows to use select/poll/epoll instead of signals.
Feedback and comments are highly appreciated.
Signed-off-by: Milan Svoboda <[EMAIL PROTECTED]>
---
diff -uprN -X orig/Documentation/dontdiff orig/drivers/usb/gadget/inode.c
new_gadget/drivers/usb/gadget/inode.c
--- orig/drivers/usb/gadget/inode.c 2006-06-19 10:42:37.000000000 +0000
+++ new_gadget/drivers/usb/gadget/inode.c 2006-06-23 10:01:04.000000000
+0000
@@ -1230,6 +1230,35 @@ dev_release (struct inode *inode, struct
return 0;
}
+static unsigned int
+ep0_poll (struct file *fd, poll_table *wait)
+{
+ struct dev_data *dev = fd->private_data;
+ int mask = 0;
+
+ spin_lock_irq (&dev->lock);
+
+ /* report fd mode change before acting on it */
+ if (dev->setup_abort) {
+ dev->setup_abort = 0;
+ mask = POLLNVAL;
+ goto out;
+ }
+
+ if (dev->state == STATE_SETUP) {
+ if (dev->setup_in || dev->setup_can_stall)
+ mask = POLLOUT;
+ } else {
+ if (dev->ev_next != 0)
+ mask = POLLIN;
+ }
+
+ poll_wait(fd, &dev->wait, wait);
+out:
+ spin_unlock_irq(&dev->lock);
+ return mask;
+}
+
static int dev_ioctl (struct inode *inode, struct file *fd,
unsigned code, unsigned long value)
{
@@ -1249,7 +1278,7 @@ static struct file_operations ep0_io_ope
.read = ep0_read,
.write = ep0_write,
.fasync = ep0_fasync,
- // .poll = ep0_poll,
+ .poll = ep0_poll,
.ioctl = dev_ioctl,
.release = dev_release,
};
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