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net: dsa: microchip: add error checking for ksz_pwrite 

Add status validation for port register write inside
lan937x_change_mtu. ksz_pwrite and ksz_pread api's are
updated with return type int (Reference patch mentioned
below). Update lan937x_change_mtu with status validation
for ksz_pwrite16().

Link: https://patchwork.kernel.org/project/netdevbpf/patch/20220826105634.3855578-6-o.rempel@pengutronix.de/

Signed-off-by: Rakesh Sankaranarayanan <rakesh.sankaranarayanan@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Rakesh Sankaranarayanan 2022-11-07 14:59:20 +05:30 committed by David S. Miller
parent a9c6db3bc9
commit e06999c3dc
1 changed files with 5 additions and 1 deletions
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6
drivers/net/dsa/microchip/lan937x_main.c
View File

@ -242,7 +242,11 @@ int lan937x_change_mtu(struct ksz_device *dev, int port, int new_mtu)
}
/* Write the frame size in PORT_MAX_FR_SIZE register */
ksz_pwrite16(dev, port, PORT_MAX_FR_SIZE, new_mtu);
ret = ksz_pwrite16(dev, port, PORT_MAX_FR_SIZE, new_mtu);
if (ret) {
dev_err(ds->dev, "failed to update mtu for port %d\n", port);
return ret;
}
return 0;
}