[PATCH net-next v1] net: macb: fix use of at91_default_usrio without CONFIG_OF

From: Conor Dooley <conor.dooley@microchip.com>

If CONFIG_OF is not enabled, at91_default_usrio is used undeclared in
gem_default_config. Rather than move the struct around, take the
opportunity to rename gem_default_config, as the only compatible it is
ever used for is "cdns,macb" - not "cdns,gem" at all! With that done,
remove the use of default_gem_config as a fallback in probe, as every
device has a specific set of match data.

It pains me a little to leave at91_default_usrio in match data used by
"cdns,macb", but this is probably required to avoid regressing anyone.

Reported-by: kernel test robot <redacted>
Closes: https://lore.kernel.org/oe-kbuild-all/202603280028.wQjUrIvv-lkp@intel.com/ (local)
Reported-by: Jiawen Wu <jiawenwu@trustnetic.com>
Closes: https://lore.kernel.org/all/06a701dcc014$86def5b0$949ce110$@trustnetic.com/ (local)
Fixes: a17871778ee28 ("net: macb: rename macb_default_usrio to at91_default_usrio as not all platforms have mii mode control in usrio")
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
---
lkp also reported this over the weekend, but against the dev copy in my
tree. I had thought that CONFIG_OF was standard off on x86, but I guess
it isn't, given lkp didn't catch it until randconfigs.

CC: Andrew Lunn <andrew+netdev@lunn.ch>
CC: David S. Miller <davem@davemloft.net>
CC: Eric Dumazet <edumazet@google.com>
CC: Jakub Kicinski <kuba@kernel.org>
CC: Paolo Abeni <pabeni@redhat.com>
CC: Nicolas Ferre <nicolas.ferre@microchip.com>
CC: Claudiu Beznea <claudiu.beznea@tuxon.dev>
CC: netdev@vger.kernel.org
CC: devicetree@vger.kernel.org
CC: linux-kernel@vger.kernel.org
CC: linux-riscv@lists.infradead.org
---
 drivers/net/ethernet/cadence/macb_main.c | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index 12e2b2f4aaf88..4f70e4fcf4606 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c

@@ -5716,9 +5716,18 @@ static const struct macb_config pic64hpsc_config = {
 	.jumbo_max_len = 16383,
 };
 
+static const struct macb_config macb_macb_config = {
+	.caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE |
+		MACB_CAPS_JUMBO |
+		MACB_CAPS_GEM_HAS_PTP,
+	.dma_burst_length = 16,
+	.usrio = &at91_default_usrio,
+	.jumbo_max_len = 10240,
+};
+
 static const struct of_device_id macb_dt_ids[] = {
 	{ .compatible = "cdns,at91sam9260-macb", .data = &at91sam9260_config },
-	{ .compatible = "cdns,macb" },
+	{ .compatible = "cdns,macb", .data = &macb_macb_config},
 	{ .compatible = "cdns,np4-macb", .data = &np4_config },
 	{ .compatible = "cdns,pc302-gem", .data = &pc302gem_config },
 	{ .compatible = "cdns,gem", .data = &pc302gem_config },

@@ -5747,15 +5756,6 @@ static const struct of_device_id macb_dt_ids[] = {
 MODULE_DEVICE_TABLE(of, macb_dt_ids);
 #endif /* CONFIG_OF */
 
-static const struct macb_config default_gem_config = {
-	.caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE |
-		MACB_CAPS_JUMBO |
-		MACB_CAPS_GEM_HAS_PTP,
-	.dma_burst_length = 16,
-	.usrio = &at91_default_usrio,
-	.jumbo_max_len = 10240,
-};
-
 static int macb_probe(struct platform_device *pdev)
 {
 	struct clk *pclk, *hclk = NULL, *tx_clk = NULL, *rx_clk = NULL;

@@ -5778,7 +5778,7 @@ static int macb_probe(struct platform_device *pdev)
 
 	macb_config = of_device_get_match_data(&pdev->dev);
 	if (!macb_config)
-		macb_config = &default_gem_config;
+		return -EINVAL;
 
 	err = macb_clk_init(pdev, &pclk, &hclk, &tx_clk, &rx_clk, &tsu_clk,
 			    macb_config);

-- 
2.53.0