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virtio: console: Return -EPIPE to hvc_console if we lost the connection 

hvc_console handles -EPIPE properly when the connection to the host is
lost.

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 2010-05-19 22:15:47 -06:00 committed by Rusty Russell
parent eaeff9608a
commit 6dc69f9702
1 changed files with 6 additions and 2 deletions
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8
drivers/char/virtio_console.c
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@ -653,7 +653,7 @@ static int put_chars(u32 vtermno, const char *buf, int count)
port = find_port_by_vtermno(vtermno);
if (!port)
return 0;
return -EPIPE;
return send_buf(port, (void *)buf, count);
}
@ -669,9 +669,13 @@ static int get_chars(u32 vtermno, char *buf, int count)
{
struct port *port;
/* If we've not set up the port yet, we have no input to give. */
if (unlikely(early_put_chars))
return 0;
port = find_port_by_vtermno(vtermno);
if (!port)
return 0;
return -EPIPE;
/* If we don't have an input queue yet, we can't get input. */
BUG_ON(!port->in_vq);