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RFC 'SKB reserve' quirk setup to u_ether

Ben Hutchings cip-dev 1 version New

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  1. v1 RFC Latest2 of 7 patches 0 repliesNew

2 of 7 patches are in this archive. The cover letter announces 7.

Patches in v1 No applies recorded yet

#Subject and filesSizeRepliesApplied
7/7ARM: shmobile: defconfig: Enable missing support based on DTSes+0 -01 reply
7/7ARM: shmobile: defconfig: Enable missing support based on DTSes+0 -01 reply

Reviews trailers per patch

No Reviewed-by, Acked-by or Tested-by trailers for v1 yet.

Read the v1 thread

Cover letter [cip-dev] [RFC PATCH 0/7] 'SKB reserve' quirk setup to u_ether
Quoted 9 lines · Biju Das

Hi All,

Some platforms (e.g. USB-DMAC on R-Car and RZ/G1 SoCs) has memory alignment restriction. If memory alignment is not match, the usb peripheral driver decides not to use the DMA controller. Then, the performance is not good.

Patch 1-4 --> basically add support only for NCM network model.

Quoted 8 lines

Patch 5--> supports for all network models.

Patch 6-->fixes cpulock up condition on the USB DMAC driver

Patch 7--> enables USB DMAC

Renesas USB DMAC driver is not enabled in 4.4 stable kernel. So not planning to send the patch set to stable kernel.

The USB DMAC driver is present, so I think patch 6 should go to 4.4- stable. For the rest, I agree they can be added to 4.4-cip only.

Ben.

Quoted 23 lines

Cheers,
Biju

Dmitry Osipenko (1):
? usb: gadget: f_ncm/u_ether: Move 'SKB reserve' quirk setup to u_ether

Geert Uytterhoeven (1):
? ARM: shmobile: defconfig: Enable missing support based on DTSes

Yoshihiro Shimoda (5):
? usb: gadget: add a new quirk to avoid skb_reserve in u_ether.c ? usb: gadget: u_ether: add a flag to avoid skb_reserve() calling ? usb: gadget: f_ncm: add support for no_skb_reserve
? usb: renesas_usbhs: set quirk_avoids_skb_reserve if USB-DMAC is used ? dmaengine: usb-dmac: fix endless loop in usb_dmac_chan_terminate_all()

?arch/arm/configs/shmobile_defconfig????|??1 +
?drivers/dma/sh/usb-dmac.c??????????????|??4 ++--
?drivers/usb/gadget/function/u_ether.c??|??5 ++++-
?drivers/usb/renesas_usbhs/mod_gadget.c |??2 ++
?include/linux/usb/gadget.h?????????????| 13 +++++++++++++

?5 files changed, 22 insertions(+), 3 deletions(-)

Signature · 4 lines
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Read the cover letter in its thread