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virtio: console: Use wait_event_freezable instead of _interruptible 

Get ready to support suspend/resume by using the freezable calls so that
blocking read/write syscalls are handled properly across suspend/resume.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Amit Shah 2011-09-14 13:06:41 +05:30 committed by Rusty Russell
parent 291024ef35
commit a08fa92d16
1 changed files with 5 additions and 4 deletions
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9
drivers/char/virtio_console.c
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@ -21,6 +21,7 @@
#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/freezer.h>
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/list.h>
@ -633,8 +634,8 @@ static ssize_t port_fops_read(struct file *filp, char __user *ubuf,
if (filp->f_flags & O_NONBLOCK)
return -EAGAIN;
ret = wait_event_interruptible(port->waitqueue,
!will_read_block(port));
ret = wait_event_freezable(port->waitqueue,
!will_read_block(port));
if (ret < 0)
return ret;
}
@ -677,8 +678,8 @@ static ssize_t port_fops_write(struct file *filp, const char __user *ubuf,
if (nonblock)
return -EAGAIN;
ret = wait_event_interruptible(port->waitqueue,
!will_write_block(port));
ret = wait_event_freezable(port->waitqueue,
!will_write_block(port));
if (ret < 0)
return ret;
}