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[for-next,3/6] IB/mlx5: Fix list_del of empty list

Message ID 1383225996-14828-4-git-send-email-eli@mellanox.com (mailing list archive)
State Accepted, archived
Headers show

Commit Message

Eli Cohen Oct. 31, 2013, 1:26 p.m. UTC 
For archs with pages size of 4K, when the chunk is freed, fwp is not in the
list so avoid attempting to delete it.

Signed-off-by: Eli Cohen <eli@mellanox.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c b/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c
index ba816c2..37b6ad1 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c
@@ -229,7 +229,8 @@  static void free_4k(struct mlx5_core_dev *dev, u64 addr)
 	set_bit(n, &fwp->bitmask);
 	if (fwp->free_count == MLX5_NUM_4K_IN_PAGE) {
 		rb_erase(&fwp->rb_node, &dev->priv.page_root);
-		list_del(&fwp->list);
+		if (fwp->free_count != 1)
+			list_del(&fwp->list);
 		dma_unmap_page(&dev->pdev->dev, addr, PAGE_SIZE, DMA_BIDIRECTIONAL);
 		__free_page(fwp->page);
 		kfree(fwp);