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Commit e22fc27c authored by Milan Svoboda's avatar Milan Svoboda Committed by Greg Kroah-Hartman
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USB: add poll to gadgetfs's endpoint zero 



Add poll() support to gadgetfs ep0

Signed-off-by: default avatarMilan Svoboda <msvoboda@ra.rockwell.com>
Signed-off-by: default avatarDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 9bcbcf4d

drivers/usb/gadget/inode.c

+31 −1
Original line number Diff line number Diff line
@@ -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,

};