From: kbuild test robot Subject: [PATCH] staging: ccree: fix ifnullfree.cocci warnings Date: Fri, 21 Apr 2017 02:06:29 +0800 Message-ID: <20170420180629.GA1954@lkp-ne04.lkp.intel.com> References: <201704210146.3krxPlST%fengguang.wu@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Mark Rutland , devel@driverdev.osuosl.org, Herbert Xu , Binoy Jayan , Greg Kroah-Hartman , linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Rob Herring , kbuild-all@01.org, gilad.benyossef@arm.com, Stuart Yoder , Ofir Drang , "David S. Miller" , linux-crypto@vger.kernel.org To: Gilad Ben-Yossef Return-path: Content-Disposition: inline In-Reply-To: <1492693983-8175-3-git-send-email-gilad@benyossef.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: driverdev-devel-bounces@linuxdriverproject.org Sender: "devel" List-Id: linux-crypto.vger.kernel.org drivers/staging/ccree/ssi_hash.c:317:2-7: WARNING: NULL check before freeing functions like kfree, debugfs_remove, debugfs_remove_recursive or usb_free_urb is not needed. Maybe consider reorganizing relevant code to avoid passing NULL values. drivers/staging/ccree/ssi_hash.c:320:2-7: WARNING: NULL check before freeing functions like kfree, debugfs_remove, debugfs_remove_recursive or usb_free_urb is not needed. Maybe consider reorganizing relevant code to avoid passing NULL values. drivers/staging/ccree/ssi_hash.c:323:2-7: WARNING: NULL check before freeing functions like kfree, debugfs_remove, debugfs_remove_recursive or usb_free_urb is not needed. Maybe consider reorganizing relevant code to avoid passing NULL values. drivers/staging/ccree/ssi_hash.c:373:2-7: WARNING: NULL check before freeing functions like kfree, debugfs_remove, debugfs_remove_recursive or usb_free_urb is not needed. Maybe consider reorganizing relevant code to avoid passing NULL values. drivers/staging/ccree/ssi_hash.c:375:2-7: WARNING: NULL check before freeing functions like kfree, debugfs_remove, debugfs_remove_recursive or usb_free_urb is not needed. Maybe consider reorganizing relevant code to avoid passing NULL values. drivers/staging/ccree/ssi_hash.c:377:2-7: WARNING: NULL check before freeing functions like kfree, debugfs_remove, debugfs_remove_recursive or usb_free_urb is not needed. Maybe consider reorganizing relevant code to avoid passing NULL values. drivers/staging/ccree/ssi_hash.c:379:3-8: WARNING: NULL check before freeing functions like kfree, debugfs_remove, debugfs_remove_recursive or usb_free_urb is not needed. Maybe consider reorganizing relevant code to avoid passing NULL values. drivers/staging/ccree/ssi_hash.c:381:2-7: WARNING: NULL check before freeing functions like kfree, debugfs_remove, debugfs_remove_recursive or usb_free_urb is not needed. Maybe consider reorganizing relevant code to avoid passing NULL values. drivers/staging/ccree/ssi_hash.c:383:2-7: WARNING: NULL check before freeing functions like kfree, debugfs_remove, debugfs_remove_recursive or usb_free_urb is not needed. Maybe consider reorganizing relevant code to avoid passing NULL values. NULL check before some freeing functions is not needed. Based on checkpatch warning "kfree(NULL) is safe this check is probably not required" and kfreeaddr.cocci by Julia Lawall. Generated by: scripts/coccinelle/free/ifnullfree.cocci CC: Gilad Ben-Yossef Signed-off-by: Fengguang Wu --- ssi_hash.c | 27 +++++++++------------------ 1 file changed, 9 insertions(+), 18 deletions(-) --- a/drivers/staging/ccree/ssi_hash.c +++ b/drivers/staging/ccree/ssi_hash.c @@ -313,14 +313,11 @@ fail4: state->digest_buff_dma_addr = 0; } fail3: - if (state->opad_digest_buff != NULL) - kfree(state->opad_digest_buff); + kfree(state->opad_digest_buff); fail2: - if (state->digest_bytes_len != NULL) - kfree(state->digest_bytes_len); + kfree(state->digest_bytes_len); fail1: - if (state->digest_buff != NULL) - kfree(state->digest_buff); + kfree(state->digest_buff); fail_digest_result_buff: if (state->digest_result_buff != NULL) { kfree(state->digest_result_buff); @@ -369,18 +366,12 @@ static void ssi_hash_unmap_request(struc state->opad_digest_dma_addr = 0; } - if (state->opad_digest_buff != NULL) - kfree(state->opad_digest_buff); - if (state->digest_bytes_len != NULL) - kfree(state->digest_bytes_len); - if (state->digest_buff != NULL) - kfree(state->digest_buff); - if (state->digest_result_buff != NULL) - kfree(state->digest_result_buff); - if (state->buff1 != NULL) - kfree(state->buff1); - if (state->buff0 != NULL) - kfree(state->buff0); + kfree(state->opad_digest_buff); + kfree(state->digest_bytes_len); + kfree(state->digest_buff); + kfree(state->digest_result_buff); + kfree(state->buff1); + kfree(state->buff0); } static void ssi_hash_unmap_result(struct device *dev,