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| author | Matt Fleming | 2013-03-25 10:14:30 +0100 |
|---|---|---|
| committer | Matt Fleming | 2013-04-09 12:34:05 +0200 |
| commit | a6e4d5a03e9e3587e88aba687d8f225f4f04c792 (patch) | |
| tree | 5159dd594f8c70ef964ec0fef74a6e8482f2606e /drivers/firmware | |
| parent | efivars: Fix check for CONFIG_EFI_VARS_PSTORE_DEFAULT_DISABLE (diff) | |
| download | kernel-qcow2-linux-a6e4d5a03e9e3587e88aba687d8f225f4f04c792.tar.gz kernel-qcow2-linux-a6e4d5a03e9e3587e88aba687d8f225f4f04c792.tar.xz kernel-qcow2-linux-a6e4d5a03e9e3587e88aba687d8f225f4f04c792.zip | |
x86, efivars: firmware bug workarounds should be in platform code
Let's not burden ia64 with checks in the common efivars code that we're not
writing too much data to the variable store. That kind of thing is an x86
firmware bug, plain and simple.
efi_query_variable_store() provides platforms with a wrapper in which they can
perform checks and workarounds for EFI variable storage bugs.
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Diffstat (limited to 'drivers/firmware')
| -rw-r--r-- | drivers/firmware/efivars.c | 18 |
1 files changed, 3 insertions, 15 deletions
diff --git a/drivers/firmware/efivars.c b/drivers/firmware/efivars.c index 7acafb80fd4c..bf15d81d74e1 100644 --- a/drivers/firmware/efivars.c +++ b/drivers/firmware/efivars.c @@ -436,24 +436,12 @@ static efi_status_t check_var_size_locked(struct efivars *efivars, u32 attributes, unsigned long size) { - u64 storage_size, remaining_size, max_size; - efi_status_t status; const struct efivar_operations *fops = efivars->ops; - if (!efivars->ops->query_variable_info) + if (!efivars->ops->query_variable_store) return EFI_UNSUPPORTED; - status = fops->query_variable_info(attributes, &storage_size, - &remaining_size, &max_size); - - if (status != EFI_SUCCESS) - return status; - - if (!storage_size || size > remaining_size || size > max_size || - (remaining_size - size) < (storage_size / 2)) - return EFI_OUT_OF_RESOURCES; - - return status; + return fops->query_variable_store(attributes, size); } @@ -2131,7 +2119,7 @@ efivars_init(void) ops.get_variable = efi.get_variable; ops.set_variable = efi.set_variable; ops.get_next_variable = efi.get_next_variable; - ops.query_variable_info = efi.query_variable_info; + ops.query_variable_store = efi_query_variable_store; error = register_efivars(&__efivars, &ops, efi_kobj); if (error) |