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authorNathan Chancellor <nathan@kernel.org>2021-06-27 21:45:43 +0300
committerDavid S. Miller <davem@davemloft.net>2021-06-29 01:50:21 +0300
commitb74ef9f9cb91fc86c642af965b7598c4df1c9922 (patch)
treed8597b8f7e0ce4274eb49bb39b0eb45c82c9fdb4 /drivers/net
parent74e7feff0e22f054839c18b29658d33e7b2d8512 (diff)
downloadlinux-b74ef9f9cb91fc86c642af965b7598c4df1c9922.tar.xz
net: sparx5: Do not use mac_addr uninitialized in mchp_sparx5_probe()
Clang warns: drivers/net/ethernet/microchip/sparx5/sparx5_main.c:760:29: warning: variable 'mac_addr' is uninitialized when used here [-Wuninitialized] if (of_get_mac_address(np, mac_addr)) { ^~~~~~~~ drivers/net/ethernet/microchip/sparx5/sparx5_main.c:669:14: note: initialize the variable 'mac_addr' to silence this warning u8 *mac_addr; ^ = NULL 1 warning generated. mac_addr is only used to store the value retrieved from of_get_mac_address(), which is then copied into the base_mac member of the sparx5 struct using ether_addr_copy(). It is easier to just use the base_mac address directly, which avoids the warning and the extra copy. Fixes: 3cfa11bac9bb ("net: sparx5: add the basic sparx5 driver") Link: https://github.com/ClangBuiltLinux/linux/issues/1413 Signed-off-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/ethernet/microchip/sparx5/sparx5_main.c5
1 files changed, 1 insertions, 4 deletions
diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_main.c b/drivers/net/ethernet/microchip/sparx5/sparx5_main.c
index abaa086ce345..f666133a15de 100644
--- a/drivers/net/ethernet/microchip/sparx5/sparx5_main.c
+++ b/drivers/net/ethernet/microchip/sparx5/sparx5_main.c
@@ -670,7 +670,6 @@ static int mchp_sparx5_probe(struct platform_device *pdev)
struct reset_control *reset;
struct sparx5 *sparx5;
int idx = 0, err = 0;
- u8 *mac_addr;
if (!np && !pdev->dev.platform_data)
return -ENODEV;
@@ -761,12 +760,10 @@ static int mchp_sparx5_probe(struct platform_device *pdev)
if (err)
goto cleanup_config;
- if (of_get_mac_address(np, mac_addr)) {
+ if (!of_get_mac_address(np, sparx5->base_mac)) {
dev_info(sparx5->dev, "MAC addr was not set, use random MAC\n");
eth_random_addr(sparx5->base_mac);
sparx5->base_mac[5] = 0;
- } else {
- ether_addr_copy(sparx5->base_mac, mac_addr);
}
sparx5->xtr_irq = platform_get_irq_byname(sparx5->pdev, "xtr");