From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-eopbgr00045.outbound.protection.outlook.com ([40.107.0.45]:12953 "EHLO EUR02-AM5-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932303AbeCSJ4t (ORCPT ); Mon, 19 Mar 2018 05:56:49 -0400 From: Jagdish Gediya To: linux-mtd@lists.infradead.org Cc: oss@buserror.net, boris.brezillon@free-electrons.com, computersforpeace@gmail.com, leoyang.li@nxp.com, Jagdish Gediya , stable@vger.kernel.org Subject: [PATCH] mtd: rawnand: fsl_ifc: Fix nand waitfunc return value Date: Tue, 20 Mar 2018 03:35:12 +0530 Message-Id: <1521497112-31770-1-git-send-email-jagdish.gediya@nxp.com> MIME-Version: 1.0 Content-Type: text/plain Sender: stable-owner@vger.kernel.org List-ID: As per the IFC hardware manual, Most significant 2 bytes in nand_fsr register are the outcome of NAND READ STATUS command. So status value need to be shifted and aligned as per the nand framework requirement. Cc: stable@vger.kernel.org Signed-off-by: Jagdish Gediya Reviewed-by: Prabhakar Kushwaha --- drivers/mtd/nand/fsl_ifc_nand.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/mtd/nand/fsl_ifc_nand.c b/drivers/mtd/nand/fsl_ifc_nand.c index d9ce398..951dd89 100644 --- a/drivers/mtd/nand/fsl_ifc_nand.c +++ b/drivers/mtd/nand/fsl_ifc_nand.c @@ -643,12 +643,13 @@ static int fsl_ifc_wait(struct mtd_info *mtd, struct nand_chip *chip) fsl_ifc_run_command(mtd); nand_fsr = ifc_in32(&ifc->ifc_nand.nand_fsr); - + nand_fsr >>= 16; + nand_fsr = (nand_fsr >> 8) | (nand_fsr << 8); /* * The chip always seems to report that it is * write-protected, even when it is not. */ - return nand_fsr | NAND_STATUS_WP; + return (nand_fsr & 0xff) | NAND_STATUS_WP; } /* -- 1.9.1