[PATCH net] soc: fsl: dpio: properly compute the consumer index

[Ioana Ciornei]

Mask the consumer index before using it. Without this, we would be
writing frame descriptors beyond the ring size supported by the QBMAN
block.

Fixes: 3b2abda7d28c ("soc: fsl: dpio: Replace QMAN array mode with ring mode 
enqueue")
Signed-off-by: Ioana Ciornei <ioana.cior...@nxp.com>
---

I am sending this fix through the net tree since the bug manifests
itself only on net-next and not the soc trees. This way it would be
easier to integrate this sooner rather than later.

 drivers/soc/fsl/dpio/qbman-portal.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/soc/fsl/dpio/qbman-portal.c 
b/drivers/soc/fsl/dpio/qbman-portal.c
index 804b8ba9bf5c..23a1377971f4 100644
--- a/drivers/soc/fsl/dpio/qbman-portal.c
+++ b/drivers/soc/fsl/dpio/qbman-portal.c
@@ -669,6 +669,7 @@ int qbman_swp_enqueue_multiple_direct(struct qbman_swp *s,
                eqcr_ci = s->eqcr.ci;
                p = s->addr_cena + QBMAN_CENA_SWP_EQCR_CI;
                s->eqcr.ci = qbman_read_register(s, QBMAN_CINH_SWP_EQCR_CI);
+               s->eqcr.ci &= full_mask;
 
                s->eqcr.available = qm_cyc_diff(s->eqcr.pi_ring_size,
                                        eqcr_ci, s->eqcr.ci);
-- 
2.17.1