# # USB Class driver configuration # comment "USB Device Class drivers" config USB_ACM tristate "USB Modem (CDC ACM) support" depends on TTY ---help--- This driver supports USB modems and ISDN adapters which support the Communication Device Class Abstract Control Model interface. Please read for details. If your modem only reports "Cls=ff(vend.)" in the descriptors in /proc/bus/usb/devices, then your modem will not work with this driver. To compile this driver as a module, choose M here: the module will be called cdc-acm. config USB_PRINTER tristate "USB Printer support" help Say Y here if you want to connect a USB printer to your computer's USB port. To compile this driver as a module, choose M here: the module will be called usblp. config USB_WDM tristate "USB Wireless Device Management support" ---help--- This driver supports the WMC Device Management functionality of cell phones compliant to the CDC WMC specification. You can use AT commands over this device. To compile this driver as a module, choose M here: the module will be called cdc-wdm. config USB_TMC tristate "USB Test and Measurement Class support" help Say Y here if you want to connect a USB device that follows the USB.org specification for USB Test and Measurement devices to your computer's USB port. To compile this driver as a module, choose M here: the module will be called usbtmc. b right'>Tobias Klauser
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authorArd Biesheuvel <ard.biesheuvel@linaro.org>2017-02-01 17:45:02 +0000
committerIngo Molnar <mingo@kernel.org>2017-02-01 21:17:49 +0100
commitc8f325a59cfc718d13a50fbc746ed9b415c25e92 (patch)
treed53fbdac9d0781e39a13b2ac6b2bd258cf3b4140 /net/bluetooth/rfcomm
parentbf29bddf0417a4783da3b24e8c9e017ac649326f (diff)
efi/fdt: Avoid FDT manipulation after ExitBootServices()
Some AArch64 UEFI implementations disable the MMU in ExitBootServices(), after which unaligned accesses to RAM are no longer supported. Commit: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel") fixed an issue in the memory map handling of the stub FDT code, but inadvertently created an issue with such firmware, by moving some of the FDT manipulation to after the invocation of ExitBootServices(). Given that the stub's libfdt implementation uses the ordinary, accelerated string functions, which rely on hardware handling of unaligned accesses, manipulating the FDT with the MMU off may result in alignment faults. So fix the situation by moving the update_fdt_memmap() call into the callback function invoked by efi_exit_boot_services() right before it calls the ExitBootServices() UEFI service (which is arguably a better place for it anyway) Note that disabling the MMU in ExitBootServices() is not compliant with the UEFI spec, and carries great risk due to the fact that switching from cached to uncached memory accesses halfway through compiler generated code (i.e., involving a stack) can never be done in a way that is architecturally safe. Fixes: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel") Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Tested-by: Riku Voipio <riku.voipio@linaro.org> Cc: <stable@vger.kernel.org> Cc: mark.rutland@arm.com Cc: linux-efi@vger.kernel.org Cc: matt@codeblueprint.co.uk Cc: leif.lindholm@linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1485971102-23330-2-git-send-email-ard.biesheuvel@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'net/bluetooth/rfcomm')