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| author | Christian Lamparter <chunkeey@gmail.com> | 2021-09-18 16:41:41 +0200 |
|---|---|---|
| committer | Christian Lamparter <chunkeey@gmail.com> | 2021-09-23 20:50:58 +0200 |
| commit | 608baf44c60cd3614a9bd502b7742919725a4c43 (patch) | |
| tree | 766da4fb889c7eebbfb150cb336a5206725f02a6 /target/linux/bcm53xx/patches-5.10 | |
| parent | fd67908647390b916470501c88b4f5258123da95 (diff) | |
| download | upstream-608baf44c60cd3614a9bd502b7742919725a4c43.tar.gz upstream-608baf44c60cd3614a9bd502b7742919725a4c43.tar.bz2 upstream-608baf44c60cd3614a9bd502b7742919725a4c43.zip | |
bcm53xx: MR32: read mac-address from eeprom
Meraki wrote the ethernet MAC-address of the device
onto the eeprom (AT24C64) at the fixed location 0x66
to 0x6C. Let's fetch it from there.
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Diffstat (limited to 'target/linux/bcm53xx/patches-5.10')
| -rw-r--r-- | target/linux/bcm53xx/patches-5.10/099-net-bcma-handle-deferred-probe.patch | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/target/linux/bcm53xx/patches-5.10/099-net-bcma-handle-deferred-probe.patch b/target/linux/bcm53xx/patches-5.10/099-net-bcma-handle-deferred-probe.patch new file mode 100644 index 0000000000..db2d98593e --- /dev/null +++ b/target/linux/bcm53xx/patches-5.10/099-net-bcma-handle-deferred-probe.patch @@ -0,0 +1,46 @@ +From 029497e66bdc762e001880e4c85a91f35a54b1e2 Mon Sep 17 00:00:00 2001 +From: Christian Lamparter <chunkeey@gmail.com> +Date: Sun, 19 Sep 2021 13:57:25 +0200 +Subject: net: bgmac-bcma: handle deferred probe error due to mac-address +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Due to the inclusion of nvmem handling into the mac-address getter +function of_get_mac_address() by +commit d01f449c008a ("of_net: add NVMEM support to of_get_mac_address") +it is now possible to get a -EPROBE_DEFER return code. Which did cause +bgmac to assign a random ethernet address. + +This exact issue happened on my Meraki MR32. The nvmem provider is +an EEPROM (at24c64) which gets instantiated once the module +driver is loaded... This happens once the filesystem becomes available. + +With this patch, bgmac_probe() will propagate the -EPROBE_DEFER error. +Then the driver subsystem will reschedule the probe at a later time. + +Cc: Petr Štetiar <ynezz@true.cz> +Cc: Michael Walle <michael@walle.cc> +Fixes: d01f449c008a ("of_net: add NVMEM support to of_get_mac_address") +Signed-off-by: Christian Lamparter <chunkeey@gmail.com> +Signed-off-by: David S. Miller <davem@davemloft.net> +--- + drivers/net/ethernet/broadcom/bgmac-bcma.c | 2 ++ + 1 file changed, 2 insertions(+) + +diff --git a/drivers/net/ethernet/broadcom/bgmac-bcma.c b/drivers/net/ethernet/broadcom/bgmac-bcma.c +index 85fa0ab7201c7..9513cfb5ba58c 100644 +--- a/drivers/net/ethernet/broadcom/bgmac-bcma.c ++++ b/drivers/net/ethernet/broadcom/bgmac-bcma.c +@@ -129,6 +129,8 @@ static int bgmac_probe(struct bcma_device *core) + bcma_set_drvdata(core, bgmac); + + err = of_get_mac_address(bgmac->dev->of_node, bgmac->net_dev->dev_addr); ++ if (err == -EPROBE_DEFER) ++ return err; + + /* If no MAC address assigned via device tree, check SPROM */ + if (err) { +-- +cgit 1.2.3-1.el7 + |