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authorAnton Blanchard <anton@samba.org>2011-07-05 21:51:36 +0000
committerGreg Kroah-Hartman <gregkh@suse.de>2011-08-04 21:58:41 -0700
commitdc96c18103480c2aacb6c4c7fbb9400e29c604c9 (patch)
tree41f36c17469307c7c7fcd11ce201739001e249e9
parent86c361cdb455adea881fe00ee055e8290283d47c (diff)
downloadlwn-dc96c18103480c2aacb6c4c7fbb9400e29c604c9.tar.gz
lwn-dc96c18103480c2aacb6c4c7fbb9400e29c604c9.zip
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>
-rw-r--r--arch/powerpc/platforms/pseries/hvconsole.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/pseries/hvconsole.c b/arch/powerpc/platforms/pseries/hvconsole.c
index 3f6a89b09816..041e87ca1893 100644
--- a/arch/powerpc/platforms/pseries/hvconsole.c
+++ b/arch/powerpc/platforms/pseries/hvconsole.c
@@ -73,7 +73,7 @@ int hvc_put_chars(uint32_t vtermno, const char *buf, int count)
if (ret == H_SUCCESS)
return count;
if (ret == H_BUSY)
- return 0;
+ return -EAGAIN;
return -EIO;
}