From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752952AbcGGP1m (ORCPT ); Thu, 7 Jul 2016 11:27:42 -0400 Received: from 51.17-broadband.acttv.in ([106.51.17.148]:9221 "EHLO arvind-ThinkPad-Edge-E431" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1751615AbcGGP1f (ORCPT ); Thu, 7 Jul 2016 11:27:35 -0400 From: Arvind Yadav To: scottwood@freescale.com Cc: qiang.zhao@freescale.com, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, Arvind Yadav Subject: [PATCH] Remove lots of IS_ERR_VALUE abuses and compilation warning. Date: Thu, 7 Jul 2016 20:57:29 +0530 Message-Id: <1467905249-3990-1-git-send-email-arvind.yadav.cs@gmail.com> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Passing value in IS_ERR_VALUE() is wrong, as they pass an 'int' into a function that takes an 'unsigned long' argument. This happens to work because the type is sign-extended on 64-bit architectures before it gets converted into an unsigned type. Passing an 'unsigned short' or 'unsigned int' argument into IS_ERR_VALUE() is guaranteed to be broken, as are 8-bit integers and types that are wider than 'unsigned long'. Any user will get compilation warning for that do not pass an 'unsigned long' argument. Commit '287980e49f; - This change is alreday fixes lots of other worst abusers. Signed-off-by: Arvind Yadav --- drivers/soc/fsl/qe/ucc_fast.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/soc/fsl/qe/ucc_fast.c b/drivers/soc/fsl/qe/ucc_fast.c index a768931..7cc783c 100644 --- a/drivers/soc/fsl/qe/ucc_fast.c +++ b/drivers/soc/fsl/qe/ucc_fast.c @@ -268,7 +268,7 @@ int ucc_fast_init(struct ucc_fast_info * uf_info, struct ucc_fast_private ** ucc /* Allocate memory for Tx Virtual Fifo */ uccf->ucc_fast_tx_virtual_fifo_base_offset = qe_muram_alloc(uf_info->utfs, UCC_FAST_VIRT_FIFO_REGS_ALIGNMENT); - if (IS_ERR_VALUE(uccf->ucc_fast_tx_virtual_fifo_base_offset)) { + if (uccf->ucc_fast_tx_virtual_fifo_base_offset < 0) { printk(KERN_ERR "%s: cannot allocate MURAM for TX FIFO\n", __func__); uccf->ucc_fast_tx_virtual_fifo_base_offset = 0; @@ -281,7 +281,7 @@ int ucc_fast_init(struct ucc_fast_info * uf_info, struct ucc_fast_private ** ucc qe_muram_alloc(uf_info->urfs + UCC_FAST_RECEIVE_VIRTUAL_FIFO_SIZE_FUDGE_FACTOR, UCC_FAST_VIRT_FIFO_REGS_ALIGNMENT); - if (IS_ERR_VALUE(uccf->ucc_fast_rx_virtual_fifo_base_offset)) { + if (uccf->ucc_fast_rx_virtual_fifo_base_offset < 0) { printk(KERN_ERR "%s: cannot allocate MURAM for RX FIFO\n", __func__); uccf->ucc_fast_rx_virtual_fifo_base_offset = 0; -- 1.9.1