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i2c: atr: allow replacing mappings in attach_addr()

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It is possible for aliases to be exhausted while we are still attaching
children.

Allow replacing mapping on attach by calling
i2c_atr_replace_mapping_by_addr() if i2c_atr_create_mapping_by_addr()
fails.

Signed-off-by: Cosmin Tanislav <demonsingur@gmail.com>
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
This commit is contained in:
Cosmin Tanislav 2025-05-07 15:19:12 +03:00 committed by Wolfram Sang
parent 02426327e2
commit b09d8a9cce
1 changed files with 3 additions and 0 deletions
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3
drivers/i2c/i2c-atr.c
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@ -543,6 +543,9 @@ static int i2c_atr_attach_addr(struct i2c_adapter *adapter,
mutex_lock(&chan->alias_pairs_lock);
c2a = i2c_atr_create_mapping_by_addr(chan, addr);
if (!c2a)
c2a = i2c_atr_replace_mapping_by_addr(chan, addr);
if (!c2a) {
dev_err(atr->dev, "failed to find a free alias\n");
ret = -EBUSY;