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authorRoy Franz <roy.franz@linaro.org>2013-09-22 15:45:38 -0700
committerMatt Fleming <matt.fleming@intel.com>2013-09-25 12:34:42 +0100
commit0e1cadb05bba2293b4575c8cab275313d181d94f (patch)
tree67b3d6a3c48b3fcaad7a5232b84930ca7a678798 /drivers/firmware
parentae8e9060a3ecfd22bd5059e39f81547613ae376c (diff)
downloadlinux-0e1cadb05bba2293b4575c8cab275313d181d94f.tar.bz2
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.c3
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);
}