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>
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@ -390,8 +390,9 @@ static int genwqe_check_ddcb_queue(struct genwqe_dev *cd,
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0x00000000)
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goto go_home; /* not completed, continue waiting */
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/* Note: DDCB could be purged */
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wmb(); /* Add sync to decouple prev. read operations */
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/* Note: DDCB could be purged */
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req = queue->ddcb_req[queue->ddcb_act];
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if (req == NULL) {
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/* this occurs if DDCB is purged, not an error */
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