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| author | Rokas Juras <asrokasjuras@gmail.com> | 2026-10-05 10:48:52 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-10-08 16:50:11 -0700 |
| commit | f688218baa7128a1ef3f8377679fc5fcbc22fa2e (patch) | |
| tree | 7e88946f4a850b7bb435fa92e96c61d90d9ac77c /include/linux/usb | |
| parent | 9142c2f8f84bf4eafe23e9d68b6ba016a60300c0 (diff) | |
| download | linux-next-f688218baa7128a1ef3f8377679fc5fcbc22fa2e.tar.gz linux-next-f688218baa7128a1ef3f8377679fc5fcbc22fa2e.zip | |
rndis_host: enable RX aggregation for OnePlus Nord CE 2
USB tethering on the OnePlus Nord CE 2 (IV2201, USB ID 22d9:2766)
running Android 13 has download speeds of approximately 2mbps
with the default 2048-byte receive limit.
The phone's published RNDIS code only enables packet batching
when the computer reports a receive limit above 2048 bytes.
Testing shows that increasing this limit to 2560 bytes
restores normal speeds.
Add a quirk for USB device 22d9:2766 to use and advertise a
receive buffer of at least 16 KiB. This fits the phone code's default
batch of ten packets at a 1500-byte MTU.
Tested on 7.3.0-rc5 with the affected phone, including reconnecting
USB tethering. Download speeds with the change exceed 100mpbs.
Link: https://github.com/OnePlusOSS/android_kernel_oneplus_mt6877/blob/3c1e3d432d0c35afa7fded974b50fa6617219e0f/drivers/usb/gadget/function/f_rndis.c#L538-L551
Link: https://github.com/OnePlusOSS/android_kernel_oneplus_mt6877/blob/3c1e3d432d0c35afa7fded974b50fa6617219e0f/drivers/usb/gadget/function/u_ether.c#L869-L874
Signed-off-by: Rokas Juras <asrokasjuras@gmail.com>
Link: https://patch.msgid.link/20261005074852.76818-1-asrokasjuras@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/linux/usb')
| -rw-r--r-- | include/linux/usb/rndis_host.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/include/linux/usb/rndis_host.h b/include/linux/usb/rndis_host.h index 489cfb1d00f6..3eaf57a9b282 100644 --- a/include/linux/usb/rndis_host.h +++ b/include/linux/usb/rndis_host.h @@ -182,8 +182,9 @@ struct rndis_keepalive_c { /* IN (optionally OUT) */ #define FLAG_RNDIS_PHYM_WIRELESS 0x0002 /* Flags for driver_info::data */ -#define RNDIS_DRIVER_DATA_POLL_STATUS 1 /* poll status before control */ -#define RNDIS_DRIVER_DATA_DST_MAC_FIXUP 2 /* device ignores configured MAC address */ +#define RNDIS_DRIVER_DATA_POLL_STATUS 1 /* poll status before control */ +#define RNDIS_DRIVER_DATA_DST_MAC_FIXUP 2 /* device ignores configured MAC address */ +#define RNDIS_DRIVER_DATA_RX_AGGREGATION 4 /* needs RX limit > 2048 */ extern void rndis_status(struct usbnet *dev, struct urb *urb); extern int |