powerpc/pseries/hvconsole: Fix dropped console output
authorAnton Blanchard <anton@samba.org>
Tue, 5 Jul 2011 21:51:36 +0000 (21:51 +0000)
committerGreg Kroah-Hartman <gregkh@suse.de>
Fri, 5 Aug 2011 04:58:41 +0000 (21:58 -0700)
commitdc96c18103480c2aacb6c4c7fbb9400e29c604c9
tree41f36c17469307c7c7fcd11ce201739001e249e9
parent86c361cdb455adea881fe00ee055e8290283d47c
powerpc/pseries/hvconsole: Fix dropped console output

commit 51d33021425e1f905beb4208823146f2fb6517da upstream.

Return -EAGAIN when we get H_BUSY back from the hypervisor. This
makes the hvc console driver retry, avoiding dropped printks.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
arch/powerpc/platforms/pseries/hvconsole.c