[PATCH 36/91] powerpc/pseries/hvconsole: Fix dropped console output
From: Willy Tarreau <w@1wt.eu>
Date: 2012-02-05 22:27:00
Also in:
lkml
2.6.27-longterm review patch. If anyone has any objections, please let us know. ------------------ 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 <redacted> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> --- arch/powerpc/platforms/pseries/hvconsole.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) Index: longterm-2.6.27/arch/powerpc/platforms/pseries/hvconsole.c ===================================================================
--- longterm-2.6.27.orig/arch/powerpc/platforms/pseries/hvconsole.c 2012-02-05 22:34:33.922915442 +0100
+++ longterm-2.6.27/arch/powerpc/platforms/pseries/hvconsole.c 2012-02-05 22:34:39.962914708 +0100@@ -73,7 +73,7 @@ if (ret == H_SUCCESS) return count; if (ret == H_BUSY) - return 0; + return -EAGAIN; return -EIO; }