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| author | Ilias Apalodimas <ilias.apalodimas@linaro.org> | 2020-10-22 01:04:21 +0300 |
|---|---|---|
| committer | Heinrich Schuchardt <xypron.glpk@gmx.de> | 2020-10-27 21:13:16 +0100 |
| commit | 529441ca89b155abcad2acea62b6f35c19b1c0ac (patch) | |
| tree | 54405295f6ba717c319949c052ea7940526b67c7 /lib | |
| parent | 19763ea0d235643ec33f8e3615a5c9943ecdc36b (diff) | |
| download | u-boot-529441ca89b155abcad2acea62b6f35c19b1c0ac.tar.gz | |
efi_loader: Disable devices before handing over control
U-Boot Driver Model is supposed to remove devices with either
DM_REMOVE_ACTIVE_DMA or DM_REMOVE_OS_PREPARE flags set, before exiting.
Our bootm command does that by explicitly calling calling
"dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL);" and we also disable any
USB devices.
The EFI equivalent is doing none of those at the moment. As a result
probing an fTPM driver now renders it unusable in Linux. During our
(*probe) callback we open a session with OP-TEE, which is supposed to
close with our (*remove) callback. Since the (*remove) is never called,
once we boot into Linux and try to probe the device again we are getting
a busy error response. Moreover all uclass (*preremove) functions won't
run.
So let's fix this by mimicking what bootm does and disconnect devices
when efi_exit_boot_services() is called.
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/efi_loader/efi_boottime.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c index 2896c3ea5a..b26ac9fbfc 100644 --- a/lib/efi_loader/efi_boottime.c +++ b/lib/efi_loader/efi_boottime.c @@ -8,6 +8,8 @@ #include <common.h> #include <bootm.h> #include <div64.h> +#include <dm/device.h> +#include <dm/root.h> #include <efi_loader.h> #include <irq_func.h> #include <log.h> @@ -15,6 +17,7 @@ #include <pe.h> #include <time.h> #include <u-boot/crc.h> +#include <usb.h> #include <watchdog.h> #include <linux/libfdt_env.h> @@ -1993,7 +1996,10 @@ static efi_status_t EFIAPI efi_exit_boot_services(efi_handle_t image_handle, list_del(&evt->link); } + if IS_ENABLED(CONFIG_USB_DEVICE) + udc_disconnect(); board_quiesce_devices(); + dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL); /* Patch out unsupported runtime function */ efi_runtime_detach(); |