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i3c: master: use kzalloc_flex

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Simplifies allocations by using a flexible array member in this struct.

Add __counted_by to get extra runtime analysis.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260312001534.24423-1-rosenp@gmail.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Rosen Penev 2026-03-11 17:15:34 -07:00 committed by Alexandre Belloni
parent eaa1d092a4
commit 7f53c556c2
1 changed files with 4 additions and 10 deletions
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14
drivers/i3c/master.c
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@ -2820,10 +2820,10 @@ struct i3c_generic_ibi_slot {
struct i3c_generic_ibi_pool {
spinlock_t lock;
unsigned int num_slots;
struct i3c_generic_ibi_slot *slots;
void *payload_buf;
struct list_head free_slots;
struct list_head pending;
struct i3c_generic_ibi_slot slots[] __counted_by(num_slots);
};
/**
@ -2851,7 +2851,6 @@ void i3c_generic_ibi_free_pool(struct i3c_generic_ibi_pool *pool)
WARN_ON(nslots != pool->num_slots);
kfree(pool->payload_buf);
kfree(pool->slots);
kfree(pool);
}
EXPORT_SYMBOL_GPL(i3c_generic_ibi_free_pool);
@ -2874,20 +2873,16 @@ i3c_generic_ibi_alloc_pool(struct i3c_dev_desc *dev,
unsigned int i;
int ret;
pool = kzalloc_obj(*pool);
pool = kzalloc_flex(*pool, slots, req->num_slots);
if (!pool)
return ERR_PTR(-ENOMEM);
pool->num_slots = req->num_slots;
spin_lock_init(&pool->lock);
INIT_LIST_HEAD(&pool->free_slots);
INIT_LIST_HEAD(&pool->pending);
pool->slots = kzalloc_objs(*slot, req->num_slots);
if (!pool->slots) {
ret = -ENOMEM;
goto err_free_pool;
}
if (req->max_payload_len) {
pool->payload_buf = kcalloc(req->num_slots,
req->max_payload_len, GFP_KERNEL);
@ -2906,7 +2901,6 @@ i3c_generic_ibi_alloc_pool(struct i3c_dev_desc *dev,
(i * req->max_payload_len);
list_add_tail(&slot->node, &pool->free_slots);
pool->num_slots++;
}
return pool;