From patchwork Mon Jan 2 12:20:35 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Artem Bityutskiy X-Patchwork-Id: 133821 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from merlin.infradead.org (merlin.infradead.org [IPv6:2001:4978:20e::2]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 928BAB6F68 for ; Mon, 2 Jan 2012 23:21:08 +1100 (EST) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1Rhgre-0003k2-34; Mon, 02 Jan 2012 12:19:42 +0000 Received: from mga01.intel.com ([192.55.52.88]) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1Rhgqm-0003RB-60 for linux-mtd@lists.infradead.org; Mon, 02 Jan 2012 12:18:48 +0000 Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga101.fm.intel.com with ESMTP; 02 Jan 2012 04:18:47 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.71,315,1320652800"; d="scan'208";a="102309945" Received: from sauron.fi.intel.com ([10.237.72.160]) by fmsmga001.fm.intel.com with ESMTP; 02 Jan 2012 04:18:46 -0800 From: Artem Bityutskiy To: linux-mtd@lists.infradead.org Subject: [PATCH 05/17] mtd: mtdoops: do not use mtd->panic_write directly Date: Mon, 2 Jan 2012 14:20:35 +0200 Message-Id: <1325506847-23470-6-git-send-email-dedekind1@gmail.com> X-Mailer: git-send-email 1.7.7.4 In-Reply-To: <1325506847-23470-1-git-send-email-dedekind1@gmail.com> References: <1325506847-23470-1-git-send-email-dedekind1@gmail.com> X-Spam-Note: CRM114 invocation failed X-Spam-Score: -5.0 (-----) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-5.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at http://www.dnswl.org/, high trust [192.55.52.88 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (dedekind1[at]gmail.com) 0.0 DKIM_ADSP_CUSTOM_MED No valid author signature, adsp_override is CUSTOM_MED 0.8 SPF_NEUTRAL SPF: sender does not match SPF record (neutral) 0.2 FREEMAIL_ENVFROM_END_DIGIT Envelope-from freemail username ends in digit (dedekind1[at]gmail.com) -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] 0.9 NML_ADSP_CUSTOM_MED ADSP custom_med hit, and not from a mailing list X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-mtd-bounces@lists.infradead.org Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org From: Artem Bityutskiy Instead of checking if 'mtd->panic_write' is defined, call 'mtd_panic_write()' and check the error code - '-EOPNOTSUPP' will be returned if the function is not defined. Signed-off-by: Artem Bityutskiy --- drivers/mtd/mtdoops.c | 17 ++++++++--------- include/linux/mtd/mtd.h | 2 ++ 2 files changed, 10 insertions(+), 9 deletions(-) diff --git a/drivers/mtd/mtdoops.c b/drivers/mtd/mtdoops.c index 69532a3..c8540b8 100644 --- a/drivers/mtd/mtdoops.c +++ b/drivers/mtd/mtdoops.c @@ -221,10 +221,14 @@ static void mtdoops_write(struct mtdoops_context *cxt, int panic) hdr[0] = cxt->nextcount; hdr[1] = MTDOOPS_KERNMSG_MAGIC; - if (panic) + if (panic) { ret = mtd_panic_write(mtd, cxt->nextpage * record_size, record_size, &retlen, cxt->oops_buf); - else + if (ret == -EOPNOTSUPP) { + printk(KERN_ERR "mtdoops: Cannot write from panic without panic_write\n"); + return; + } + } else ret = mtd_write(mtd, cxt->nextpage * record_size, record_size, &retlen, cxt->oops_buf); @@ -330,13 +334,8 @@ static void mtdoops_do_dump(struct kmsg_dumper *dumper, memcpy(dst + l1_cpy, s2 + s2_start, l2_cpy); /* Panics must be written immediately */ - if (reason != KMSG_DUMP_OOPS) { - if (!cxt->mtd->panic_write) - printk(KERN_ERR "mtdoops: Cannot write from panic without panic_write\n"); - else - mtdoops_write(cxt, 1); - return; - } + if (reason != KMSG_DUMP_OOPS) + mtdoops_write(cxt, 1); /* For other cases, schedule work to write it "nicely" */ schedule_work(&cxt->work_write); diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h index 2c2a922..b729640 100644 --- a/include/linux/mtd/mtd.h +++ b/include/linux/mtd/mtd.h @@ -311,6 +311,8 @@ static inline int mtd_panic_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf) { *retlen = 0; + if (!mtd->panic_write) + return -EOPNOTSUPP; return mtd->panic_write(mtd, to, len, retlen, buf); }