[Xen-changelog] [qemu-xen master] hw/char/spapr_vty: Return amount of free buffer entries in vty_can_receive()

[patchbot@xxxxxxx]

commit 8a273cbe53221d28abfc98f33a0d057b26e53d6a
Author:     Thomas Huth <thuth@xxxxxxxxxx>
AuthorDate: Fri Nov 18 10:09:37 2016 +0100
Commit:     David Gibson <david@xxxxxxxxxxxxxxxxxxxxx>
CommitDate: Wed Nov 23 12:00:48 2016 +1100

    hw/char/spapr_vty: Return amount of free buffer entries in vty_can_receive()
    
    The can_receive() callbacks of the character devices should return
    the amount of characters that can be accepted at once, not just a
    boolean value (which rather means only one character at a time).
    
    Signed-off-by: Thomas Huth <thuth@xxxxxxxxxx>
    Signed-off-by: David Gibson <david@xxxxxxxxxxxxxxxxxxxxx>
---
 hw/char/spapr_vty.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/char/spapr_vty.c b/hw/char/spapr_vty.c
index 06b9b39..7c22b8b 100644
--- a/hw/char/spapr_vty.c
+++ b/hw/char/spapr_vty.c
@@ -25,7 +25,7 @@ static int vty_can_receive(void *opaque)
 {
     VIOsPAPRVTYDevice *dev = VIO_SPAPR_VTY_DEVICE(opaque);
 
-    return (dev->in - dev->out) < VTERM_BUFSIZE;
+    return VTERM_BUFSIZE - (dev->in - dev->out);
 }
 
 static void vty_receive(void *opaque, const uint8_t *buf, int size)
--
generated by git-patchbot for /home/xen/git/qemu-xen.git#master

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