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Subject[PATCH 2/8] efi/x86: Use non-blocking SetVariable() for efi_delete_dummy_variable()
Date
From: Sai Praneeth <sai.praneeth.prakhya@intel.com>

Presently, efi_delete_dummy_variable() uses set_variable() which might
block and hence kernel prints stack trace with a warning "bad:
scheduling from the idle thread!". So, make efi_delete_dummy_variable()
use set_variable_nonblocking(), which, as the name suggests doesn't
block.

Signed-off-by: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
---
arch/x86/platform/efi/quirks.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/arch/x86/platform/efi/quirks.c b/arch/x86/platform/efi/quirks.c
index 36c1f8b9f7e0..6af39dc40325 100644
--- a/arch/x86/platform/efi/quirks.c
+++ b/arch/x86/platform/efi/quirks.c
@@ -105,12 +105,11 @@ early_param("efi_no_storage_paranoia", setup_storage_paranoia);
*/
void efi_delete_dummy_variable(void)
{
- efi.set_variable((efi_char16_t *)efi_dummy_name,
- &EFI_DUMMY_GUID,
- EFI_VARIABLE_NON_VOLATILE |
- EFI_VARIABLE_BOOTSERVICE_ACCESS |
- EFI_VARIABLE_RUNTIME_ACCESS,
- 0, NULL);
+ efi.set_variable_nonblocking((efi_char16_t *)efi_dummy_name,
+ &EFI_DUMMY_GUID,
+ EFI_VARIABLE_NON_VOLATILE |
+ EFI_VARIABLE_BOOTSERVICE_ACCESS |
+ EFI_VARIABLE_RUNTIME_ACCESS, 0, NULL);
}

/*
--
2.17.1
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