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sync: add poll support

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Change-Id: I294e481bba92658e6dd26f157ddbf0e9ff4ce8a5
Signed-off-by: Erik Gilling <konkers@android.com>
This commit is contained in:
Erik Gilling 2012-03-19 17:28:32 -07:00
parent 484101e5a8
commit a1eeacaf7a
1 changed files with 17 additions and 0 deletions
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17
drivers/base/sync.c
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@ -18,6 +18,7 @@
#include <linux/file.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/poll.h>
#include <linux/sched.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
@ -221,12 +222,14 @@ static void sync_pt_activate(struct sync_pt *pt)
}
static int sync_fence_release(struct inode *inode, struct file *file);
static unsigned int sync_fence_poll(struct file *file, poll_table *wait);
static long sync_fence_ioctl(struct file *file, unsigned int cmd,
unsigned long arg);
static const struct file_operations sync_fence_fops = {
.release = sync_fence_release,
.poll = sync_fence_poll,
.unlocked_ioctl = sync_fence_ioctl,
};
@ -497,6 +500,20 @@ static int sync_fence_release(struct inode *inode, struct file *file)
return 0;
}
static unsigned int sync_fence_poll(struct file *file, poll_table *wait)
{
struct sync_fence *fence = file->private_data;
poll_wait(file, &fence->wq, wait);
if (fence->status == 1)
return POLLIN;
else if (fence->status < 0)
return POLLERR;
else
return 0;
}
static long sync_fence_ioctl_wait(struct sync_fence *fence, unsigned long arg)
{
__u32 value;