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After a long time, we finally have a good solution for how to handle OS descriptor on FFS. From now on we will force the Reserved field to be 1 as mandated by the specification. Apart from that, we have a couple other smaller fixes: - FFS learned to not sleep in atomic context. - UDC-core has a fix for the way we set a UDC's operating speed. - Renesas USB3 has a fix for the maximum number of pipes supported - Allow legacy drivers to be compiled without USB_ETH - Fix some coccinelle warnings -----BEGIN PGP SIGNATURE----- iQJRBAABCgA7FiEElLzh7wn96CXwjh2IzL64meEamQYFAlof73odHGZlbGlwZS5i YWxiaUBsaW51eC5pbnRlbC5jb20ACgkQzL64meEamQYceA//RG7Zr6FYZXlmjtQR klW3em7lI7706Ha7Tn+wFb6eK6Hl0NgkpuGsaRyk+JD1XK2mC5AIWAkzMJY3P+5b v1GDGS9AcZB5XA70wfe+o8USCF5C4YY/96zYIq4dpugKxMUuU0LnhAJMkZ34zsAD 6oH2Wxku+wClnciMthHCegNcu2WFHIO/ef7PsamK3JGdEUC6AoOolizowc7XPhvP mc1Gc7MwsCkk0u1OPsAxKWZrokdrAjJPMTV79rSNnkE6FtTBtRckeuilq5yQ8aWY M0rJ+cYZeR8JOADINxIBucQ4d5PDemGrq6JX5aats8RvS+7q9M6xqfBugRNA/GBN RVut4GMuTvQQMTTLKN/MZKE2uGjIuncgOT6QmSrDqKzFg73fZAV4gh5rCvtNeccO y0GBHU4F8zFLdLLqPAAGWsHq19ZEa+EIuRVhB7vPR02VtjZ0UZNXymKgwzVDKhuF N5CHHJzqyypKqx2L2vyBkKakYb2KXZhWlNVuWaTiMCRe0SIQ/LqBjhzDK/rSHPZe pEA37vYlCF0UWddqBrwA4wgnJhHdv980z4SroAFpTrV6dblLGA2nkwO2ZmaHuHBO VSXIFLhvN1iyRrJ6cfoD5FAXliatxSwIz91HAplAzVP2W+dPUCd9qvgTyirS7BLi dovO1gCgVzDnKr1tj01bdycy3Fo= =hBSF -----END PGP SIGNATURE----- Merge tag 'fixes-for-v4.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-linus Felipe writes: usb: fixes for v4.15-rc2 After a long time, we finally have a good solution for how to handle OS descriptor on FFS. From now on we will force the Reserved field to be 1 as mandated by the specification. Apart from that, we have a couple other smaller fixes: - FFS learned to not sleep in atomic context. - UDC-core has a fix for the way we set a UDC's operating speed. - Renesas USB3 has a fix for the maximum number of pipes supported - Allow legacy drivers to be compiled without USB_ETH - Fix some coccinelle warnings
To understand all the Linux-USB framework, you'll use these resources: * This source code. This is necessarily an evolving work, and includes kerneldoc that should help you get a current overview. ("make pdfdocs", and then look at "usb.pdf" for host side and "gadget.pdf" for peripheral side.) Also, Documentation/usb has more information. * The USB 2.0 specification (from www.usb.org), with supplements such as those for USB OTG and the various device classes. The USB specification has a good overview chapter, and USB peripherals conform to the widely known "Chapter 9". * Chip specifications for USB controllers. Examples include host controllers (on PCs, servers, and more); peripheral controllers (in devices with Linux firmware, like printers or cell phones); and hard-wired peripherals like Ethernet adapters. * Specifications for other protocols implemented by USB peripheral functions. Some are vendor-specific; others are vendor-neutral but just standardized outside of the www.usb.org team. Here is a list of what each subdirectory here is, and what is contained in them. core/ - This is for the core USB host code, including the usbfs files and the hub class driver ("hub_wq"). host/ - This is for USB host controller drivers. This includes UHCI, OHCI, EHCI, and others that might be used with more specialized "embedded" systems. gadget/ - This is for USB peripheral controller drivers and the various gadget drivers which talk to them. Individual USB driver directories. A new driver should be added to the first subdirectory in the list below that it fits into. image/ - This is for still image drivers, like scanners or digital cameras. ../input/ - This is for any driver that uses the input subsystem, like keyboard, mice, touchscreens, tablets, etc. ../media/ - This is for multimedia drivers, like video cameras, radios, and any other drivers that talk to the v4l subsystem. ../net/ - This is for network drivers. serial/ - This is for USB to serial drivers. storage/ - This is for USB mass-storage drivers. class/ - This is for all USB device drivers that do not fit into any of the above categories, and work for a range of USB Class specified devices. misc/ - This is for all USB device drivers that do not fit into any of the above categories.