Re: [PATCH net-next v1 1/1] net: dsa: ar9331: fix potential dead lock on mdio access
From: Andrew Lunn <andrew@lunn.ch>
Date: 2022-06-16 13:34:37
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quoted hunk ↗ jump to hunk
static int ar9331_mdio_read(void *ctx, const void *reg_buf, size_t reg_len,@@ -849,6 +849,8 @@ static int ar9331_mdio_read(void *ctx, const void *reg_buf, size_t reg_len, return 0; } + mutex_lock_nested(&sbus->mdio_lock, MDIO_MUTEX_NESTED); +
Do you know about mdiobus_read_nested() and mdiobus_write_nested(). The mv88e6xxx driver uses these. Andrew