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| author | Eberhard S. Amann <esa@linux.vnet.ibm.com> | 2014-09-10 16:37:52 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-09-23 23:15:47 -0700 |
| commit | 08e4906cc29d092ae2da0ff089efe1488e584d3c (patch) | |
| tree | 85c495b48f209fc636109c895fccefa398f8af7e /drivers/misc/genwqe | |
| parent | d9c11d45b33c9226abd50a50c87e19bfa7c7a2cb (diff) | |
| download | lwn-08e4906cc29d092ae2da0ff089efe1488e584d3c.tar.gz lwn-08e4906cc29d092ae2da0ff089efe1488e584d3c.zip | |
GenWQE: Fix problem when reading HSI and Retc
This patch fixes a problem we found during debug on PPC64 when
reading HSI status and Retc.
Signed-off-by: Eberhard S. Amann <esa@linux.vnet.ibm.com>
Signed-off-by: Frank Haverkamp <haver@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/genwqe')
| -rw-r--r-- | drivers/misc/genwqe/card_ddcb.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/misc/genwqe/card_ddcb.c b/drivers/misc/genwqe/card_ddcb.c index f10575000180..51480e4f8054 100644 --- a/drivers/misc/genwqe/card_ddcb.c +++ b/drivers/misc/genwqe/card_ddcb.c @@ -390,8 +390,9 @@ static int genwqe_check_ddcb_queue(struct genwqe_dev *cd, 0x00000000) goto go_home; /* not completed, continue waiting */ - /* Note: DDCB could be purged */ + wmb(); /* Add sync to decouple prev. read operations */ + /* Note: DDCB could be purged */ req = queue->ddcb_req[queue->ddcb_act]; if (req == NULL) { /* this occurs if DDCB is purged, not an error */ |