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Message-Id: <20110806000415.528984236@clark.kroah.org>
Date: Fri, 05 Aug 2011 17:03:57 -0700
From: Greg KH <gregkh@...e.de>
To: linux-kernel@...r.kernel.org, stable@...nel.org
Cc: stable-review@...nel.org, torvalds@...ux-foundation.org,
akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
Anton Blanchard <anton@...ba.org>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>
Subject: [39/50] powerpc/pseries/hvconsole: Fix dropped console output
2.6.33-longterm review patch. If anyone has any objections, please let us know.
------------------
From: Anton Blanchard <anton@...ba.org>
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@...ba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
arch/powerpc/platforms/pseries/hvconsole.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- 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, cons
if (ret == H_SUCCESS)
return count;
if (ret == H_BUSY)
- return 0;
+ return -EAGAIN;
return -EIO;
}
--
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