haozhe chang 36bd28c1cb wwan: core: Support slicing in port TX flow of WWAN subsystem ... wwan_port_fops_write inputs the SKB parameter to the TX callback of the WWAN device driver. However, the WWAN device (e.g., t7xx) may have an MTU less than the size of SKB, causing the TX buffer to be sliced and copied once more in the WWAN device driver. This patch implements the slicing in the WWAN subsystem and gives the WWAN devices driver the option to slice(by frag_len) or not. By doing so, the additional memory copy is reduced. Meanwhile, this patch gives WWAN devices driver the option to reserve headroom in fragments for the device-specific metadata. Signed-off-by: haozhe chang <haozhe.chang@mediatek.com> Reviewed-by: Loic Poulain <loic.poulain@linaro.org> Link: https://lore.kernel.org/r/20230316095826.181904-1-haozhe.chang@mediatek.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>		2023-03-17 22:38:31 -07:00
..
cdc-acm.c	tty: Call ->dtr_rts() parameter active consistently	2023-01-19 16:04:35 +01:00
cdc-acm.h	USB: cdc-acm: use CDC serial-state defines	2022-07-25 10:57:41 +02:00
cdc-wdm.c	wwan: core: Support slicing in port TX flow of WWAN subsystem	2023-03-17 22:38:31 -07:00
Kconfig	treewide: replace '---help---' in Kconfig files with 'help'	2020-06-14 01:57:21 +09:00
Makefile	USB: add SPDX identifiers to all remaining Makefiles	2017-11-07 15:53:48 +01:00
usblp.c	USB: make devnode() callback in usb_class_driver take a const *	2022-10-20 12:11:56 +02:00
usbtmc.c	usb: usbtmc: Fix bug in pipe direction for control transfers	2022-03-15 18:45:31 +01:00