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| author | Robert Richter <robert.richter@amd.com> | 2010-10-11 19:26:50 +0200 |
|---|---|---|
| committer | Robert Richter <robert.richter@amd.com> | 2010-10-11 19:26:50 +0200 |
| commit | ad0f7cfaa85fc033523a09ab1f3dd6b8ded3dff5 (patch) | |
| tree | 2565121e4b9945d953e02c77a2e53065b3789aa4 /drivers/char/virtio_console.c | |
| parent | 86c8c04792f152c5469023885510140dd34817bc (diff) | |
| parent | c7a27aa4652c63172489a73f3961455650a79a7f (diff) | |
Merge branch 'oprofile/urgent' (early part) into oprofile/perf
Diffstat (limited to 'drivers/char/virtio_console.c')
| -rw-r--r-- | drivers/char/virtio_console.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c index 942a9826bd2..c810481a5bc 100644 --- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c @@ -596,6 +596,10 @@ static ssize_t port_fops_write(struct file *filp, const char __user *ubuf, ssize_t ret; bool nonblock; + /* Userspace could be out to fool us */ + if (!count) + return 0; + port = filp->private_data; nonblock = filp->f_flags & O_NONBLOCK; @@ -642,7 +646,7 @@ static unsigned int port_fops_poll(struct file *filp, poll_table *wait) poll_wait(filp, &port->waitqueue, wait); ret = 0; - if (port->inbuf) + if (!will_read_block(port)) ret |= POLLIN | POLLRDNORM; if (!will_write_block(port)) ret |= POLLOUT; |