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| author | Roy Franz <roy.franz@linaro.org> | 2013-09-22 15:45:38 -0700 |
|---|---|---|
| committer | Matt Fleming <matt.fleming@intel.com> | 2013-09-25 12:34:42 +0100 |
| commit | 0e1cadb05bba2293b4575c8cab275313d181d94f (patch) | |
| tree | 67b3d6a3c48b3fcaad7a5232b84930ca7a678798 /drivers/firmware | |
| parent | ae8e9060a3ecfd22bd5059e39f81547613ae376c (diff) | |
| download | lwn-0e1cadb05bba2293b4575c8cab275313d181d94f.tar.gz lwn-0e1cadb05bba2293b4575c8cab275313d181d94f.zip | |
efi: Allow efi_free() to be called with size of 0
Make efi_free() safely callable with size of 0, similar to free() being
callable with NULL pointers, and do nothing in that case.
Remove size checks that this makes redundant. This also avoids some
size checks in the ARM EFI stub code that will be added as well.
Signed-off-by: Roy Franz <roy.franz@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Diffstat (limited to 'drivers/firmware')
| -rw-r--r-- | drivers/firmware/efi/efi-stub-helper.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/firmware/efi/efi-stub-helper.c b/drivers/firmware/efi/efi-stub-helper.c index b314bf720272..fda510fa3579 100644 --- a/drivers/firmware/efi/efi-stub-helper.c +++ b/drivers/firmware/efi/efi-stub-helper.c @@ -255,6 +255,9 @@ static void efi_free(efi_system_table_t *sys_table_arg, unsigned long size, { unsigned long nr_pages; + if (!size) + return; + nr_pages = round_up(size, EFI_PAGE_SIZE) / EFI_PAGE_SIZE; efi_call_phys2(sys_table_arg->boottime->free_pages, addr, nr_pages); } |