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| author |   Jesper Dangaard Brouer <brouer@redhat.com> | 2018-01-03 11:25:34 +0100 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2018-01-05 15:21:21 -0800 |
| commit | c0124f327e5cabd844a10d7e1fc5aa2a81e796a9 (patch) | |
| tree | 1e030875ade5618ad69149020f0bc427a7bc0f5f /drivers/net/ethernet/qlogic/qede/qede_main.c | |
| parent | ixgbe: setup xdp_rxq_info (diff) | |
| download | linux-dev-c0124f327e5cabd844a10d7e1fc5aa2a81e796a9.tar.xz linux-dev-c0124f327e5cabd844a10d7e1fc5aa2a81e796a9.zip | |
xdp/qede: setup xdp_rxq_info and intro xdp_rxq_info_is_reg
The driver code qede_free_fp_array() depend on kfree() can be called
with a NULL pointer. This stems from the qede_alloc_fp_array()
function which either (kz)alloc memory for fp->txq or fp->rxq.
This also simplifies error handling code in case of memory allocation
failures, but xdp_rxq_info_unreg need to know the difference.
Introduce xdp_rxq_info_is_reg() to handle if a memory allocation fails
and detect this is the failure path by seeing that xdp_rxq_info was
not registred yet, which first happens after successful alloaction in
qede_init_fp().
Driver hook points for xdp_rxq_info:
* reg : qede_init_fp
* unreg: qede_free_fp_array
Tested on actual hardware with samples/bpf program.
V2: Driver have no proper error path for failed XDP RX-queue info reg, as
qede_init_fp() is a void function.
Cc: everest-linux-l2@cavium.com
Cc: Ariel Elior <Ariel.Elior@cavium.com>
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to '')
| -rw-r--r-- | drivers/net/ethernet/qlogic/qede/qede_main.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/net/ethernet/qlogic/qede/qede_main.c b/drivers/net/ethernet/qlogic/qede/qede_main.c index 90d79ae2a48f..9929b4370ce6 100644 --- a/drivers/net/ethernet/qlogic/qede/qede_main.c +++ b/drivers/net/ethernet/qlogic/qede/qede_main.c @@ -765,6 +765,12 @@ static void qede_free_fp_array(struct qede_dev *edev) fp = &edev->fp_array[i]; kfree(fp->sb_info); + /* Handle mem alloc failure case where qede_init_fp + * didn't register xdp_rxq_info yet. + * Implicit only (fp->type & QEDE_FASTPATH_RX) + */ + if (fp->rxq && xdp_rxq_info_is_reg(&fp->rxq->xdp_rxq)) + xdp_rxq_info_unreg(&fp->rxq->xdp_rxq); kfree(fp->rxq); kfree(fp->xdp_tx); kfree(fp->txq); @@ -1493,6 +1499,10 @@ static void qede_init_fp(struct qede_dev *edev) else fp->rxq->data_direction = DMA_FROM_DEVICE; fp->rxq->dev = &edev->pdev->dev; + + /* Driver have no error path from here */ + WARN_ON(xdp_rxq_info_reg(&fp->rxq->xdp_rxq, edev->ndev, + fp->rxq->rxq_id) < 0); } if (fp->type & QEDE_FASTPATH_TX) { |