Ivan Khoronzhuk 1da4bbeffe net: core: page_pool: add user refcnt and reintroduce page_pool_destroy ... Jesper recently removed page_pool_destroy() (from driver invocation) and moved shutdown and free of page_pool into xdp_rxq_info_unreg(), in-order to handle in-flight packets/pages. This created an asymmetry in drivers create/destroy pairs. This patch reintroduce page_pool_destroy and add page_pool user refcnt. This serves the purpose to simplify drivers error handling as driver now drivers always calls page_pool_destroy() and don't need to track if xdp_rxq_info_reg_mem_model() was unsuccessful. This could be used for a special cases where a single RX-queue (with a single page_pool) provides packets for two net_device'es, and thus needs to register the same page_pool twice with two xdp_rxq_info structures. This patch is primarily to ease API usage for drivers. The recently merged netsec driver, actually have a bug in this area, which is solved by this API change. This patch is a modified version of Ivan Khoronzhuk's original patch. Link: https://lore.kernel.org/netdev/20190625175948.24771-2-ivan.khoronzhuk@linaro.org/ Fixes: 5c67bf0ec4 ("net: netsec: Use page_pool API") Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Reviewed-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>		2019-07-08 14:58:04 -07:00
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acpi
asm-generic
clocksource
crypto
drm
dt-bindings
keys
kvm
linux	Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next	2019-07-08 12:13:38 -07:00
math-emu
media
memory
misc
net	net: core: page_pool: add user refcnt and reintroduce page_pool_destroy	2019-07-08 14:58:04 -07:00
pcmcia
ras
rdma
scsi
soc
sound
target
trace
uapi	Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next	2019-07-08 12:13:38 -07:00
video
xen