From: Sven Auhagen <sven.auhagen@xxxxxxxxxxxx>
[ Upstream commit 807eaf99688ce162a98a7501477644782d4af098 ]
The remove function does not destroy all
BM Pools when per cpu pool is active.
When reloading the mvpp2 as a module the BM Pools
are still active in hardware and due to the bug
have twice the size now old + new.
This eventually leads to a kernel crash.
v2:
* add Fixes tag
Fixes: 7d04b0b13b11 ("mvpp2: percpu buffers")
Signed-off-by: Sven Auhagen <sven.auhagen@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
index 373b8c8328501..cf5d447af7db2 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -5925,8 +5925,8 @@ static int mvpp2_remove(struct platform_device *pdev)
{
struct mvpp2 *priv = platform_get_drvdata(pdev);
struct fwnode_handle *fwnode = pdev->dev.fwnode;
+ int i = 0, poolnum = MVPP2_BM_POOLS_NUM;
struct fwnode_handle *port_fwnode;
- int i = 0;
mvpp2_dbgfs_cleanup(priv);
@@ -5940,7 +5940,10 @@ static int mvpp2_remove(struct platform_device *pdev)
destroy_workqueue(priv->stats_queue);
- for (i = 0; i < MVPP2_BM_POOLS_NUM; i++) {
+ if (priv->percpu_pools)
+ poolnum = mvpp2_get_nrxqs(priv) * 2;
+
+ for (i = 0; i < poolnum; i++) {
struct mvpp2_bm_pool *bm_pool = &priv->bm_pools[i];
mvpp2_bm_pool_destroy(&pdev->dev, priv, bm_pool);
--
2.25.1
