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USB: add poll to gadgetfs's endpoint zero

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Add poll() support to gadgetfs ep0

Signed-off-by: Milan Svoboda <msvoboda@ra.rockwell.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Milan Svoboda 2006-08-08 22:23:12 -07:00 committed by Greg Kroah-Hartman
parent 9bcbcf4d00
commit e22fc27c87
1 changed files with 31 additions and 1 deletions
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32
drivers/usb/gadget/inode.c
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@ -32,6 +32,7 @@
#include <linux/compiler.h>
#include <asm/uaccess.h>
#include <linux/slab.h>
#include <linux/poll.h>
#include <linux/device.h>
#include <linux/moduleparam.h>
@ -1235,6 +1236,35 @@ dev_release (struct inode *inode, struct file *fd)
return 0;
}
static unsigned int
ep0_poll (struct file *fd, poll_table *wait)
{
struct dev_data *dev = fd->private_data;
int mask = 0;
poll_wait(fd, &dev->wait, wait);
spin_lock_irq (&dev->lock);
/* report fd mode change before acting on it */
if (dev->setup_abort) {
dev->setup_abort = 0;
mask = POLLHUP;
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;
}
out:
spin_unlock_irq(&dev->lock);
return mask;
}
static int dev_ioctl (struct inode *inode, struct file *fd,
unsigned code, unsigned long value)
{
@ -1254,7 +1284,7 @@ static const struct file_operations ep0_io_operations = {
.read = ep0_read,
.write = ep0_write,
.fasync = ep0_fasync,
// .poll = ep0_poll,
.poll = ep0_poll,
.ioctl = dev_ioctl,
.release = dev_release,
};