From 7025d9ad10a38dadef8b286e0092731c2d3cdc53 Mon Sep 17 00:00:00 2001 From: Miklos Szeredi Date: Mon, 10 Apr 2006 22:54:50 -0700 Subject: [PATCH] [PATCH] fuse: fix fuse_dev_poll() return value fuse_dev_poll() returned an error value instead of a poll mask. Luckily (or unluckily) -ENODEV does contain the POLLERR bit. There's also a race if filesystem is unmounted between fuse_get_conn() and spin_lock(), in which case this event will be missed by poll(). Signed-off-by: Miklos Szeredi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/fuse/dev.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c index 23d1f52eb1b8..b2e8613a26d8 100644 --- a/fs/fuse/dev.c +++ b/fs/fuse/dev.c @@ -804,17 +804,18 @@ static ssize_t fuse_dev_write(struct file *file, const char __user *buf, static unsigned fuse_dev_poll(struct file *file, poll_table *wait) { - struct fuse_conn *fc = fuse_get_conn(file); unsigned mask = POLLOUT | POLLWRNORM; - + struct fuse_conn *fc = fuse_get_conn(file); if (!fc) - return -ENODEV; + return POLLERR; poll_wait(file, &fc->waitq, wait); spin_lock(&fuse_lock); - if (!list_empty(&fc->pending)) - mask |= POLLIN | POLLRDNORM; + if (!fc->connected) + mask = POLLERR; + else if (!list_empty(&fc->pending)) + mask |= POLLIN | POLLRDNORM; spin_unlock(&fuse_lock); return mask; -- 2.20.1