net: mvneta: Fix CPU_MAP registers initialisation

commit 2502d0ef272da7058ef303b849a2c8dc324c2e2e upstream.

The CPU_MAP register is duplicated for each CPUs at different addresses,
each instance being at a different address.

However, the code so far was using CONFIG_NR_CPUS to initialise the CPU_MAP
registers for each registers, while the SoCs embed at most 4 CPUs.

This is especially an issue with multi_v7_defconfig, where CONFIG_NR_CPUS
is currently set to 16, resulting in writes to registers that are not
CPU_MAP.

Fixes: c5aff18204da ("net: mvneta: driver for Marvell Armada 370/XP network unit")
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
index 96fc7fe8519f21c26ff68c115982e5c3b5937915..c089fa1ceea987fcbca669a1ee8d0ecea0a710ab 100644 (file)
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -950,7 +950,7 @@ static void mvneta_defaults_set(struct mvneta_port *pp)
        /* Set CPU queue access map - all CPUs have access to all RX
         * queues and to all TX queues
         */
-       for (cpu = 0; cpu < CONFIG_NR_CPUS; cpu++)
+       for_each_present_cpu(cpu)
                mvreg_write(pp, MVNETA_CPU_MAP(cpu),
                            (MVNETA_CPU_RXQ_ACCESS_ALL_MASK |
                             MVNETA_CPU_TXQ_ACCESS_ALL_MASK));