From 7596ac9d19a9df25707ecaac0675881f62dd8c18 Mon Sep 17 00:00:00 2001 From: Ioana Ciornei Date: Tue, 5 May 2020 23:14:29 +0300 Subject: [PATCH] soc: fsl: dpio: properly compute the consumer index 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 Acked-by: Li Yang Signed-off-by: David S. Miller --- 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);