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Michael Brown 8344803c93 [efi] Disconnect controllers before uninstalling EFI_USB_IO_PROTOCOL 
The call to UninstallMultipleProtocolInterfaces() will implicitly
disconnect any relevant controllers, and there is no specified
requirement to explicitly call DisconnectController() prior to
callling UninstallMultipleProtocolInterfaces().

However, some UEFI implementations (observed with the USB keyboard
driver on a Microsoft Surface Go) will fail to implicitly disconnect
the controller and will consequently fail to uninstall the protocols.

The net effect is that unplugging and replugging a USB keyboard may
leave the keyboard in a non-functional state.

Work around these broken UEFI implementations by including an
unnecessary call to DisconnectController() before the call to
UninstallMultipleProtocolInterfaces().

Signed-off-by: Michael Brown <mcb30@ipxe.org>
 		2020-09-29 21:21:04 +01:00
contrib [coverity] Override assumptions about wcrtomb() and hmac_init() 2019-08-17 17:18:54 +01:00
src [efi] Disconnect controllers before uninstalling EFI_USB_IO_PROTOCOL 2020-09-29 21:21:04 +01:00
.travis.yml [travis] Ensure that most recent tag is always available 2020-01-03 00:14:03 +01:00
COPYING [legal] Update GPLv2 licence text 2015-02-26 17:59:53 +00:00
COPYING.GPLv2 [legal] Update GPLv2 licence text 2015-02-26 17:59:53 +00:00
COPYING.UBDL [legal] Add support for the Unmodified Binary Distribution Licence 2015-03-02 12:07:14 +00:00
README [doc] Re-add README file 2010-05-28 00:03:47 +01:00

README 

iPXE README File

Quick start guide:

   cd src
   make

For any more detailed instructions, see http://ipxe.org