This is a note to let you know that I've just added the patch titled
sparc64: ldc_connect() should not return EINVAL when handshake is in progress.
to the 3.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
sparc64-ldc_connect-should-not-return-einval-when-handshake-is-in-progress.patch
and it can be found in the queue-3.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Fri Aug 8 09:03:00 PDT 2014
From: Sowmini Varadhan <sowmini.varadhan@xxxxxxxxxx>
Date: Fri, 1 Aug 2014 09:50:40 -0400
Subject: sparc64: ldc_connect() should not return EINVAL when handshake is in progress.
From: Sowmini Varadhan <sowmini.varadhan@xxxxxxxxxx>
[ Upstream commit 4ec1b01029b4facb651b8ef70bc20a4be4cebc63 ]
The LDC handshake could have been asynchronously triggered
after ldc_bind() enables the ldc_rx() receive interrupt-handler
(and thus intercepts incoming control packets)
and before vio_port_up() calls ldc_connect(). If that is the case,
ldc_connect() should return 0 and let the state-machine
progress.
Signed-off-by: Sowmini Varadhan <sowmini.varadhan@xxxxxxxxxx>
Acked-by: Karl Volz <karl.volz@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/sparc/kernel/ldc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/sparc/kernel/ldc.c
+++ b/arch/sparc/kernel/ldc.c
@@ -1336,7 +1336,7 @@ int ldc_connect(struct ldc_channel *lp)
if (!(lp->flags & LDC_FLAG_ALLOCED_QUEUES) ||
!(lp->flags & LDC_FLAG_REGISTERED_QUEUES) ||
lp->hs_state != LDC_HS_OPEN)
- err = -EINVAL;
+ err = ((lp->hs_state > LDC_HS_OPEN) ? 0 : -EINVAL);
else
err = start_handshake(lp);
Patches currently in stable-queue which might be from sowmini.varadhan@xxxxxxxxxx are
queue-3.15/sparc64-ldc_connect-should-not-return-einval-when-handshake-is-in-progress.patch
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