From: Anton Blanchard <anton@samba.org>
To: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Cc: Tabi Timur-B04825 <B04825@freescale.com>,
"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
"borntraeger@de.ibm.com" <borntraeger@de.ibm.com>
Subject: [PATCH 2/2]: powerpc/pseries/hvconsole: Fix dropped console output
Date: Wed, 6 Jul 2011 17:51:36 +1000 [thread overview]
Message-ID: <20110706175136.2c00b292@kryten> (raw)
In-Reply-To: <20110705142844.GA2514@linux.vnet.ibm.com>
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>
Cc: <stable@kernel.org>
---
Index: linux-powerpc/arch/powerpc/platforms/pseries/hvconsole.c
===================================================================
--- linux-powerpc.orig/arch/powerpc/platforms/pseries/hvconsole.c 2011-07-06 17:11:33.799095935 +1000
+++ linux-powerpc/arch/powerpc/platforms/pseries/hvconsole.c 2011-07-06 17:11:47.499332962 +1000
@@ -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;
}
prev parent reply other threads:[~2011-07-06 7:51 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-04 10:57 hvc_console change results in corrupt oops output Anton Blanchard
2011-07-04 13:56 ` Benjamin Herrenschmidt
2011-07-04 14:24 ` Hendrik Brueckner
2011-07-05 4:17 ` Tabi Timur-B04825
2011-07-05 6:22 ` Benjamin Herrenschmidt
2011-07-05 13:51 ` Tabi Timur-B04825
2011-07-05 14:28 ` [RFC] [PATCH] hvc_console: improve tty/console put_chars handling Hendrik Brueckner
2011-07-06 7:49 ` Anton Blanchard
2011-07-06 7:50 ` [PATCH 1/2]: " Anton Blanchard
2011-07-06 7:51 ` Anton Blanchard [this message]
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