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| author |   Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2010-10-14 11:38:47 -0700 |
|---|---|---|
| committer | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2010-10-22 12:57:33 -0700 |
| commit | 403a85ff001710bb92689790b9a5c1c80e4b37a6 (patch) | |
| tree | bc327eeea8c57f7f395a442671260ccda981e799 /drivers/char | |
| parent | xen: don't add extra_pages for RAM after mem_end (diff) | |
| download | linux-dev-403a85ff001710bb92689790b9a5c1c80e4b37a6.tar.xz linux-dev-403a85ff001710bb92689790b9a5c1c80e4b37a6.zip | |
xen/hvc: only notify if we actually sent something
Don't spam dom0/xenconsoled with events unless we've actually added
something to the ring.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/hvc_xen.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/char/hvc_xen.c b/drivers/char/hvc_xen.c index 60446f82a3fc..6b8e6d18a8e6 100644 --- a/drivers/char/hvc_xen.c +++ b/drivers/char/hvc_xen.c @@ -74,7 +74,8 @@ static int __write_console(const char *data, int len) wmb(); /* write ring before updating pointer */ intf->out_prod = prod; - notify_daemon(); + if (sent) + notify_daemon(); return sent; } |