From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757183Ab1HFAIz (ORCPT ); Fri, 5 Aug 2011 20:08:55 -0400 Received: from cantor2.suse.de ([195.135.220.15]:39122 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757156Ab1HFAIw (ORCPT ); Fri, 5 Aug 2011 20:08:52 -0400 X-Mailbox-Line: From gregkh@clark.kroah.org Fri Aug 5 17:02:52 2011 Message-Id: <20110806000252.787677814@clark.kroah.org> User-Agent: quilt/0.48-16.4 Date: Fri, 05 Aug 2011 17:02:09 -0700 From: Greg KH To: linux-kernel@vger.kernel.org, stable@kernel.org Cc: stable-review@kernel.org, torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Anton Blanchard , Benjamin Herrenschmidt Subject: [39/55] powerpc/pseries/hvconsole: Fix dropped console output In-Reply-To: <20110806000257.GA25498@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 2.6.32-longterm review patch. If anyone has any objections, please let us know. ------------------ From: Anton Blanchard 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 Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Greg Kroah-Hartman --- 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; }