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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 /net/core | |
parent | 99ffc5ade4e8703c3bc56fa6bb8e25437da09ee9 (diff) | |
download | linux-c0124f327e5cabd844a10d7e1fc5aa2a81e796a9.tar.bz2 |
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 'net/core')
-rw-r--r-- | net/core/xdp.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/net/core/xdp.c b/net/core/xdp.c index 229bc5a0ee04..097a0f74e004 100644 --- a/net/core/xdp.c +++ b/net/core/xdp.c @@ -65,3 +65,9 @@ void xdp_rxq_info_unused(struct xdp_rxq_info *xdp_rxq) xdp_rxq->reg_state = REG_STATE_UNUSED; } EXPORT_SYMBOL_GPL(xdp_rxq_info_unused); + +bool xdp_rxq_info_is_reg(struct xdp_rxq_info *xdp_rxq) +{ + return (xdp_rxq->reg_state == REG_STATE_REGISTERED); +} +EXPORT_SYMBOL_GPL(xdp_rxq_info_is_reg); |