tree 17bd1896764b82285889c2c0efca9df0dc24efad
parent 2a8d6065e7b90ad9d5540650944d802b0f86bdfe
author Inbar Karmy <inbark@mellanox.com> 1508077859 +0300
committer Saeed Mahameed <saeedm@mellanox.com> 1510295961 +0900

net/mlx5e: Set page to null in case dma mapping fails

Currently, when dma mapping fails, put_page is called,
but the page is not set to null. Later, in the page_reuse treatment in
mlx5e_free_rx_descs(), mlx5e_page_release() is called for the second time,
improperly doing dma_unmap (for a non-mapped address) and an extra put_page.
Prevent this by nullifying the page pointer when dma_map fails.

Fixes: accd58833237 ("net/mlx5e: Introduce RX Page-Reuse")
Signed-off-by: Inbar Karmy <inbark@mellanox.com>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
Cc: kernel-team@fb.com
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>