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net: fec: don't dump RX FIFO register when not available

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Commit db65f35f50 ("net: fec: add support of ethtool get_regs") introduce
ethool "--register-dump" interface to dump all FEC registers.

But not all silicon implementations of the Freescale FEC hardware module
have the FRBR (FIFO Receive Bound Register) and FRSR (FIFO Receive Start
Register) register, so we should not be trying to dump them on those that
don't.

To fix it we create a quirk flag, FEC_QUIRK_HAS_RFREG, and check it before
dump those RX FIFO registers.

Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Fugang Duan
2018-10-15 05:19:00 +00:00
committed by David S. Miller
parent fbe1222c63
commit ec20a63aa8
2 changed files with 16 additions and 4 deletions
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16
drivers/net/ethernet/freescale/fec_main.c
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@@ -91,14 +91,16 @@ static struct platform_device_id fec_devtype[] = {
.driver_data = 0,
}, {
.name = "imx25-fec",
.driver_data = FEC_QUIRK_USE_GASKET | FEC_QUIRK_MIB_CLEAR,
.driver_data = FEC_QUIRK_USE_GASKET | FEC_QUIRK_MIB_CLEAR |
FEC_QUIRK_HAS_FRREG,
}, {
.name = "imx27-fec",
.driver_data = FEC_QUIRK_MIB_CLEAR,
.driver_data = FEC_QUIRK_MIB_CLEAR | FEC_QUIRK_HAS_FRREG,
}, {
.name = "imx28-fec",
.driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_SWAP_FRAME |
FEC_QUIRK_SINGLE_MDIO | FEC_QUIRK_HAS_RACC,
FEC_QUIRK_SINGLE_MDIO | FEC_QUIRK_HAS_RACC |
FEC_QUIRK_HAS_FRREG,
}, {
.name = "imx6q-fec",
.driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT |
@@ -2164,7 +2166,13 @@ static void fec_enet_get_regs(struct net_device *ndev,
memset(buf, 0, regs->len);
for (i = 0; i < ARRAY_SIZE(fec_enet_register_offset); i++) {
off = fec_enet_register_offset[i] / 4;
off = fec_enet_register_offset[i];
if ((off == FEC_R_BOUND || off == FEC_R_FSTART) &&
!(fep->quirks & FEC_QUIRK_HAS_FRREG))
continue;
off >>= 2;
buf[off] = readl(&theregs[off]);
}
}