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mvpp2: fix pointer check 

priv->page_pool is an array, so comparing against it will always return true.
Do a meaningful check by checking priv->page_pool[0] instead.
While at it, clear the page_pool pointers on deallocation, or when an
allocation error happens during init.

Reported-by: Colin Ian King <colin.king@canonical.com>
Fixes: c2d6fe6163 ("mvpp2: XDP TX support")
Signed-off-by: Matteo Croce <mcroce@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Matteo Croce 2020-07-07 15:19:13 +02:00 committed by David S. Miller
parent b416268b7a
commit 4e48978cd2
1 changed files with 12 additions and 3 deletions
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15
drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
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@ -548,8 +548,10 @@ static int mvpp2_bm_pool_destroy(struct device *dev, struct mvpp2 *priv,
val |= MVPP2_BM_STOP_MASK;
mvpp2_write(priv, MVPP2_BM_POOL_CTRL_REG(bm_pool->id), val);
if (priv->percpu_pools)
if (priv->percpu_pools) {
page_pool_destroy(priv->page_pool[bm_pool->id]);
priv->page_pool[bm_pool->id] = NULL;
}
dma_free_coherent(dev, bm_pool->size_bytes,
bm_pool->virt_addr,
@ -609,8 +611,15 @@ static int mvpp2_bm_init(struct device *dev, struct mvpp2 *priv)
mvpp2_pools[pn].buf_num,
mvpp2_pools[pn].pkt_size,
dma_dir);
if (IS_ERR(priv->page_pool[i]))
if (IS_ERR(priv->page_pool[i])) {
int j;
for (j = 0; j < i; j++) {
page_pool_destroy(priv->page_pool[j]);
priv->page_pool[j] = NULL;
}
return PTR_ERR(priv->page_pool[i]);
}
}
}
@ -4486,7 +4495,7 @@ static int mvpp2_check_pagepool_dma(struct mvpp2_port *port)
if (!priv->percpu_pools)
return err;
if (!priv->page_pool)
if (!priv->page_pool[0])
return -ENOMEM;
for (i = 0; i < priv->port_count; i++) {