Martin Habets 8fbbc33cf0 sfc: The RX page_ring is optional ...

commit 1d5a474240407c38ca8c7484a656ee39f585399c upstream.

The RX page_ring is an optional feature that improves
performance. When allocation fails the driver can still
function, but possibly with a lower bandwidth.
Guard against dereferencing a NULL page_ring.

Fixes: 2768935a46 ("sfc: reuse pages to avoid DMA mapping/unmapping costs")
Signed-off-by: Martin Habets <habetsm.xilinx@gmail.com>
Reported-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Link: https://lore.kernel.org/r/164111288276.5798.10330502993729113868.stgit@palantir17.mph.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2022-01-11 15:35:13 +01:00

..

bitfield.h

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500

2019-06-19 17:09:55 +02:00

efx.c

Merge tag 'pci-v5.15-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

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efx.h

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enum.h

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2019-06-19 17:09:55 +02:00

ethtool.c

ethtool: extend coalesce setting uAPI with CQE mode

2021-08-24 07:38:29 -07:00

falcon_boards.c

sfc: falcon: use DEVICE_ATTR_*() macro

2021-05-23 17:18:42 -07:00

falcon.c

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farch_regs.h

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2019-06-19 17:09:55 +02:00

farch.c

drivers/net/ethernet: clean up unused assignments

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filter.h

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io.h

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Kconfig

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Makefile

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mdio_10g.c

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mdio_10g.h

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mtd.c

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2019-06-19 17:09:55 +02:00

net_driver.h

sfc-falcon: Fix a typo

2021-03-24 15:09:11 -07:00

nic.c

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nic.h

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phy.h

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2019-06-19 17:09:55 +02:00

qt202x_phy.c

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2019-06-19 17:09:55 +02:00

rx.c

sfc: The RX page_ring is optional

2022-01-11 15:35:13 +01:00

selftest.c

drivers/net/ethernet: clean up mis-targeted comments

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selftest.h

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tenxpress.c

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tx.c

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tx.h

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txc43128_phy.c

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workarounds.h

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