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authorMilan Svoboda <msvoboda@ra.rockwell.com>2006-08-09 09:23:12 +0400
committerGreg Kroah-Hartman <gregkh@suse.de>2006-09-27 22:58:54 +0400
commite22fc27c87b41bda1b0daf8436224b0f79853482 (patch)
treec4067db8d26ddff8939892cefeb2af600bca90e8 /drivers/usb/gadget/inode.c
parent9bcbcf4d00cd2400e655a738e77f0d21b69c6771 (diff)
downloadlinux-e22fc27c87b41bda1b0daf8436224b0f79853482.tar.xz
USB: add poll to gadgetfs's endpoint zero
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>
Diffstat (limited to 'drivers/usb/gadget/inode.c')
-rw-r--r--drivers/usb/gadget/inode.c32
1 files changed, 31 insertions, 1 deletions
diff --git a/drivers/usb/gadget/inode.c b/drivers/usb/gadget/inode.c
index 1072e987ff21..ed9b404e5f5a 100644
--- a/drivers/usb/gadget/inode.c
+++ b/drivers/usb/gadget/inode.c
@@ -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,
};