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GenWQE: Fix problem when reading HSI and Retc

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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>
This commit is contained in:
Eberhard S. Amann 2014-09-10 16:37:52 +02:00 committed by Greg Kroah-Hartman
parent d9c11d45b3
commit 08e4906cc2
1 changed files with 2 additions and 1 deletions
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3
drivers/misc/genwqe/card_ddcb.c
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@ -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 */