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net: smc911x: Fix potential memleak() in init fail path

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Fix memleak in the init fail path, where if allocation or registration
of MDIO bus fails, then ethernet interface is not unregistered and the
private data are not freed, yet the probe function reports a failure.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit is contained in:
Marek Vasut 2020-03-15 15:57:14 +01:00 committed by marex
parent 6f6cf0083f
commit 9741795408
1 changed files with 10 additions and 2 deletions
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12
drivers/net/smc911x.c
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@ -282,15 +282,23 @@ int smc911x_initialize(u8 dev_num, int base_addr)
#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
int retval;
struct mii_dev *mdiodev = mdio_alloc();
if (!mdiodev)
if (!mdiodev) {
eth_unregister(dev);
free(dev);
return -ENOMEM;
}
strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
mdiodev->read = smc911x_miiphy_read;
mdiodev->write = smc911x_miiphy_write;
retval = mdio_register(mdiodev);
if (retval < 0)
if (retval < 0) {
mdio_free(mdiodev);
eth_unregister(dev);
free(dev);
return retval;
}
#endif
return 1;