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Merge tag 'v3.11-rc7' into stable/for-linus-3.12

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Linux 3.11-rc7

As we need the git commit 28817e9de4f039a1a8c1fe1df2fa2df524626b9e
Author: Chuck Anderson <chuck.anderson@oracle.com>
Date:   Tue Aug 6 15:12:19 2013 -0700

    xen/smp: initialize IPI vectors before marking CPU online

* tag 'v3.11-rc7': (443 commits)
  Linux 3.11-rc7
  ARC: [lib] strchr breakage in Big-endian configuration
  VFS: collect_mounts() should return an ERR_PTR
  bfs: iget_locked() doesn't return an ERR_PTR
  efs: iget_locked() doesn't return an ERR_PTR()
  proc: kill the extra proc_readfd_common()->dir_emit_dots()
  cope with potentially long ->d_dname() output for shmem/hugetlb
  usb: phy: fix build breakage
  USB: OHCI: add missing PCI PM callbacks to ohci-pci.c
  staging: comedi: bug-fix NULL pointer dereference on failed attach
  lib/lz4: correct the LZ4 license
  memcg: get rid of swapaccount leftovers
  nilfs2: fix issue with counting number of bio requests for BIO_EOPNOTSUPP error detection
  nilfs2: remove double bio_put() in nilfs_end_bio_write() for BIO_EOPNOTSUPP error
  drivers/platform/olpc/olpc-ec.c: initialise earlier
  ipv4: expose IPV4_DEVCONF
  ipv6: handle Redirect ICMP Message with no Redirected Header option
  be2net: fix disabling TX in be_close()
  Revert "ACPI / video: Always call acpi_video_init_brightness() on init"
  Revert "genetlink: fix family dump race"
  ...

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Konrad Rzeszutek Wilk
2013-09-09 12:05:37 -04:00
parent c3f31f6a6f d8dfad3876
commit 65320fceda
492 changed files with 4423 additions and 2422 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/char/virtio_console.c
+49 -23
View File
@@ -272,9 +272,12 @@ static struct port *find_port_by_devt_in_portdev(struct ports_device *portdev,
unsigned long flags;
spin_lock_irqsave(&portdev->ports_lock, flags);
list_for_each_entry(port, &portdev->ports, list)
if (port->cdev->dev == dev)
list_for_each_entry(port, &portdev->ports, list) {
if (port->cdev->dev == dev) {
kref_get(&port->kref);
goto out;
}
}
port = NULL;
out:
spin_unlock_irqrestore(&portdev->ports_lock, flags);
@@ -746,6 +749,10 @@ static ssize_t port_fops_read(struct file *filp, char __user *ubuf,
port = filp->private_data;
/* Port is hot-unplugged. */
if (!port->guest_connected)
return -ENODEV;
if (!port_has_data(port)) {
/*
* If nothing's connected on the host just return 0 in
@@ -762,7 +769,7 @@ static ssize_t port_fops_read(struct file *filp, char __user *ubuf,
if (ret < 0)
return ret;
}
/* Port got hot-unplugged. */
/* Port got hot-unplugged while we were waiting above. */
if (!port->guest_connected)
return -ENODEV;
/*
@@ -932,13 +939,25 @@ static ssize_t port_fops_splice_write(struct pipe_inode_info *pipe,
if (is_rproc_serial(port->out_vq->vdev))
return -EINVAL;
/*
* pipe->nrbufs == 0 means there are no data to transfer,
* so this returns just 0 for no data.
*/
pipe_lock(pipe);
if (!pipe->nrbufs) {
ret = 0;
goto error_out;
}
ret = wait_port_writable(port, filp->f_flags & O_NONBLOCK);
if (ret < 0)
return ret;
goto error_out;
buf = alloc_buf(port->out_vq, 0, pipe->nrbufs);
if (!buf)
return -ENOMEM;
if (!buf) {
ret = -ENOMEM;
goto error_out;
}
sgl.n = 0;
sgl.len = 0;
@@ -946,12 +965,17 @@ static ssize_t port_fops_splice_write(struct pipe_inode_info *pipe,
sgl.sg = buf->sg;
sg_init_table(sgl.sg, sgl.size);
ret = __splice_from_pipe(pipe, &sd, pipe_to_sg);
pipe_unlock(pipe);
if (likely(ret > 0))
ret = __send_to_port(port, buf->sg, sgl.n, sgl.len, buf, true);
if (unlikely(ret <= 0))
free_buf(buf, true);
return ret;
error_out:
pipe_unlock(pipe);
return ret;
}
static unsigned int port_fops_poll(struct file *filp, poll_table *wait)
@@ -1019,14 +1043,14 @@ static int port_fops_open(struct inode *inode, struct file *filp)
struct port *port;
int ret;
/* We get the port with a kref here */
port = find_port_by_devt(cdev->dev);
if (!port) {
/* Port was unplugged before we could proceed */
return -ENXIO;
}
filp->private_data = port;
/* Prevent against a port getting hot-unplugged at the same time */
spin_lock_irq(&port->portdev->ports_lock);
kref_get(&port->kref);
spin_unlock_irq(&port->portdev->ports_lock);
/*
* Don't allow opening of console port devices -- that's done
* via /dev/hvc
@@ -1498,14 +1522,6 @@ static void remove_port(struct kref *kref)
port = container_of(kref, struct port, kref);
sysfs_remove_group(&port->dev->kobj, &port_attribute_group);
device_destroy(pdrvdata.class, port->dev->devt);
cdev_del(port->cdev);
kfree(port->name);
debugfs_remove(port->debugfs_file);
kfree(port);
}
@@ -1539,12 +1555,14 @@ static void unplug_port(struct port *port)
spin_unlock_irq(&port->portdev->ports_lock);
if (port->guest_connected) {
port->guest_connected = false;
port->host_connected = false;
wake_up_interruptible(&port->waitqueue);
/* Let the app know the port is going down. */
send_sigio_to_port(port);
/* Do this after sigio is actually sent */
port->guest_connected = false;
port->host_connected = false;
wake_up_interruptible(&port->waitqueue);
}
if (is_console_port(port)) {
@@ -1563,6 +1581,14 @@ static void unplug_port(struct port *port)
*/
port->portdev = NULL;
sysfs_remove_group(&port->dev->kobj, &port_attribute_group);
device_destroy(pdrvdata.class, port->dev->devt);
cdev_del(port->cdev);
kfree(port->name);
debugfs_remove(port->debugfs_file);
/*
* Locks around here are not necessary - a port can't be
* opened after we removed the port struct from ports_list