kernel.git/drivers/char/virtio_console.c, branch linux-3.14.y

virtio_console: avoid config access from irq

2015-03-26T14:06:53Z

commit eeb8a7e8bb123e84daeef84f5a2eab99ad2839a2 upstream. when multiport is off, virtio console invokes config access from irq context, config access is blocking on s390. Fix this up by scheduling work from config irq - similar to what we do for multiport configs. Signed-off-by: Michael S. Tsirkin Reviewed-by: Amit Shah Signed-off-by: Rusty Russell Signed-off-by: Greg Kroah-Hartman

virtio_console: init work unconditionally

2015-03-26T14:06:53Z

commit 4f6e24ed9de8634d6471ef86b382cba6d4e57ca8 upstream. when multiport is off, we don't initialize config work, but we then cancel uninitialized control_work on freeze. Signed-off-by: Michael S. Tsirkin Reviewed-by: Amit Shah Signed-off-by: Rusty Russell Signed-off-by: Greg Kroah-Hartman

fix a kmap leak in virtio_console

2014-02-09T20:21:16Z

While we are at it, don't do kmap() under kmap_atomic(), *especially* for a page we'd allocated with GFP_KERNEL. It's spelled "page_address", and had that been more than that, we'd have a real trouble - kmap_high() can block, and doing that while holding kmap_atomic() is a Bad Idea(tm). Signed-off-by: Al Viro

virtio_console: verify if queue is broken after virtqueue_get_buf()

2013-10-29T00:58:18Z

If virtqueue_get_buf() returns with a NULL pointer it should be verified if the virtqueue is broken, in order to avoid loop calling cpu_relax(). Signed-off-by: Heinz Graalfs Signed-off-by: Rusty Russell

virtio: use size-based config accessors.

2013-10-17T00:25:37Z

This lets the transport do endian conversion if necessary, and insulates the drivers from the difference. Most drivers can use the simple helpers virtio_cread() and virtio_cwrite(). Signed-off-by: Rusty Russell

virtio: pm: use CONFIG_PM_SLEEP instead of CONFIG_PM

2013-09-23T06:15:58Z

The freeze and restore functions defined in virtio drivers are used for suspend and hibernate, so CONFIG_PM_SLEEP is more appropriate than CONFIG_PM. This patch replace all CONFIG_PM with CONFIG_PM_SLEEP for virtio drivers that implement freeze and restore callbacks. Signed-off-by: Aaron Lu Reviewed-by: Amit Shah Signed-off-by: Rusty Russell

virtio: console: prevent use-after-free of port name in port unplug

2013-08-09T03:32:16Z

Remove the debugfs path before freeing port->name, to prevent a possible use-after-free. Reported-by: Jason Wang Signed-off-by: Amit Shah Signed-off-by: Rusty Russell

Merge branch 'master' into virtio-next

2013-08-09T03:30:39Z

The next commit gets conflicts because it relies on patches which were cc:stable and thus had to be merged into Linus' tree before the coming merge window. So pull in master now. Signed-off-by: Rusty Russell

virtio: console: cleanup an error message

2013-07-30T06:24:30Z

The PTR_ERR(NULL) here is not useful. Signed-off-by: Dan Carpenter Reviewed-by: Amit Shah Signed-off-by: Rusty Russell

virtio: console: fix locking around send_sigio_to_port()

2013-07-29T05:20:49Z

send_sigio_to_port() checks the value of guest_connected, which we always modify under the inbuf_lock; make sure invocations of send_sigio_to_port() have take the inbuf_lock around the call. Signed-off-by: Amit Shah Signed-off-by: Rusty Russell