[PATCH 10/11] net: dsa: microchip: ksz8795: dynamic allocate memory for flush_dyn_mac_table

[Michael Grzeschik]

To get the driver working with other chips using different port counts
the dyn_mac_table should be flushed depending on the amount of physical
ports.

Signed-off-by: Michael Grzeschik <m.grzesc...@pengutronix.de>

---
v1: - based on "[PATCH v4 05/11] net: dsa: microchip: ksz8795: dynamica 
allocate memory for flush_dyn_mac_table"
    - lore: 
https://lore.kernel.org/netdev/20200803054442.20089-6-m.grzesc...@pengutronix.de/
---
 drivers/net/dsa/microchip/ksz8795.c     | 8 ++++++--
 drivers/net/dsa/microchip/ksz8795_reg.h | 2 --
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/net/dsa/microchip/ksz8795.c 
b/drivers/net/dsa/microchip/ksz8795.c
index 9ea5ec61513023f..418f71e5b90761c 100644
--- a/drivers/net/dsa/microchip/ksz8795.c
+++ b/drivers/net/dsa/microchip/ksz8795.c
@@ -750,11 +750,14 @@ static void ksz8795_port_stp_state_set(struct dsa_switch 
*ds, int port,
 
 static void ksz8795_flush_dyn_mac_table(struct ksz_device *dev, int port)
 {
-       u8 learn[TOTAL_PORT_NUM];
        int first, index, cnt;
        struct ksz_port *p;
+       u8 *learn = kzalloc(dev->port_cnt, GFP_KERNEL);
 
-       if ((uint)port < TOTAL_PORT_NUM) {
+       if (!learn)
+               return;
+
+       if ((uint)port < dev->port_cnt) {
                first = port;
                cnt = port + 1;
        } else {
@@ -779,6 +782,7 @@ static void ksz8795_flush_dyn_mac_table(struct ksz_device 
*dev, int port)
                if (!(learn[index] & PORT_LEARN_DISABLE))
                        ksz_pwrite8(dev, index, P_STP_CTRL, learn[index]);
        }
+       kfree(learn);
 }
 
 static int ksz8795_port_vlan_filtering(struct dsa_switch *ds, int port,
diff --git a/drivers/net/dsa/microchip/ksz8795_reg.h 
b/drivers/net/dsa/microchip/ksz8795_reg.h
index 6377165a236fdf3..681d19ab27b89da 100644
--- a/drivers/net/dsa/microchip/ksz8795_reg.h
+++ b/drivers/net/dsa/microchip/ksz8795_reg.h
@@ -846,8 +846,6 @@
 
 #define KS_PRIO_IN_REG                 4
 
-#define TOTAL_PORT_NUM                 5
-
 #define KSZ8795_COUNTER_NUM            0x20
 
 /* Common names used by other drivers */
-- 
2.29.2