Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1031727Ab3HIX0r (ORCPT ); Fri, 9 Aug 2013 19:26:47 -0400 Received: from mail-pa0-f45.google.com ([209.85.220.45]:45933 "EHLO mail-pa0-f45.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1031680Ab3HIX0j (ORCPT ); Fri, 9 Aug 2013 19:26:39 -0400 From: Roy Franz To: linux-kernel@vger.kernel.org, linux-efi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, matt.fleming@intel.com, linux@arm.linux.org.uk Cc: leif.lindholm@linaro.org, dave.martin@arm.com, msalter@redhat.com, Roy Franz Subject: [PATCH 07/16] Allow efi_free() to be called with size of 0, and do nothing in that case. Date: Fri, 9 Aug 2013 16:26:08 -0700 Message-Id: <1376090777-20090-8-git-send-email-roy.franz@linaro.org> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1376090777-20090-1-git-send-email-roy.franz@linaro.org> References: <1376090777-20090-1-git-send-email-roy.franz@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1734 Lines: 47 Make efi_free() safely callable with size of 0, similar to free() being callable with NULL pointers. 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 --- arch/x86/boot/compressed/eboot.c | 3 +-- drivers/firmware/efi/efi-stub-helper.c | 3 +++ 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/x86/boot/compressed/eboot.c b/arch/x86/boot/compressed/eboot.c index f44ef2f..bcfdcc2 100644 --- a/arch/x86/boot/compressed/eboot.c +++ b/arch/x86/boot/compressed/eboot.c @@ -537,8 +537,7 @@ struct boot_params *make_boot_params(void *handle, efi_system_table_t *_table) return boot_params; fail2: - if (options_size) - efi_free(sys_table, options_size, hdr->cmd_line_ptr); + efi_free(sys_table, options_size, hdr->cmd_line_ptr); fail: efi_free(sys_table, 0x4000, (unsigned long)boot_params); return NULL; diff --git a/drivers/firmware/efi/efi-stub-helper.c b/drivers/firmware/efi/efi-stub-helper.c index 647b3ba..c45e287 100644 --- a/drivers/firmware/efi/efi-stub-helper.c +++ b/drivers/firmware/efi/efi-stub-helper.c @@ -253,6 +253,9 @@ 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); } -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/