Commit 7596ac9d authored May 05, 2020 by Ioana Ciornei Committed by David S. Miller May 07, 2020

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: 3b2abda7 ("soc: fsl: dpio: Replace QMAN array mode with ring mode enqueue")
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Acked-by: Li Yang <leoyang.li@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent eb55d7b6

drivers/soc/fsl/dpio/qbman-portal.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -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);

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