net: dsa: bcm_sf2: add function finding RGMII register

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Simple macro like REG_RGMII_CNTRL_P() is insufficient as:
1. It doesn't validate port argument
2. It doesn't support chipsets with non-lineral RGMII regs layout

Missing port validation could result in getting register offset from out
of array. Random memory -> random offset -> random reads/writes. It
affected e.g. BCM4908 for REG_RGMII_CNTRL_P(7).

Fixes: a78e86ed58 ("net: dsa: bcm_sf2: Prepare for different register layouts")
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Rafał Miłecki 2021-03-18 09:01:42 +01:00 • committed by David S. Miller

parent a5538a777b

commit 55cfeb3969

2 changed files with 42 additions and 9 deletions

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49

drivers/net/dsa/bcm_sf2.c

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2

drivers/net/dsa/bcm_sf2_regs.h

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