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net: dsa: b53: prevent SWITCH_CTRL access on BCM5325

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[ Upstream commit 22ccaaca43440e90a3b68d2183045b42247dc4be ]

BCM5325 doesn't implement SWITCH_CTRL register so we should avoid reading
or writing it.

Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Link: https://patch.msgid.link/20250614080000.1884236-8-noltari@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Álvaro Fernández Rojas
2025-06-14 09:59:53 +02:00
committed by Greg Kroah-Hartman
parent 515c23c030
commit 2d1a8784d5
1 changed files with 6 additions and 5 deletions
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11
drivers/net/dsa/b53/b53_common.c
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@@ -339,11 +339,12 @@ static void b53_set_forwarding(struct b53_device *dev, int enable)
b53_write8(dev, B53_CTRL_PAGE, B53_SWITCH_MODE, mgmt);
/* Include IMP port in dumb forwarding mode
*/
b53_read8(dev, B53_CTRL_PAGE, B53_SWITCH_CTRL, &mgmt);
mgmt |= B53_MII_DUMB_FWDG_EN;
b53_write8(dev, B53_CTRL_PAGE, B53_SWITCH_CTRL, mgmt);
if (!is5325(dev)) {
/* Include IMP port in dumb forwarding mode */
b53_read8(dev, B53_CTRL_PAGE, B53_SWITCH_CTRL, &mgmt);
mgmt |= B53_MII_DUMB_FWDG_EN;
b53_write8(dev, B53_CTRL_PAGE, B53_SWITCH_CTRL, mgmt);
}
/* Look at B53_UC_FWD_EN and B53_MC_FWD_EN to decide whether
* frames should be flooded or not.