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Thu, 16 May 2019 09:42:03 -0700 (PDT) From: Kamal Dasu To: linux-mtd@lists.infradead.org Subject: [PATCH v3 1/2] mtd: Add flag to indicate panic_write Date: Thu, 16 May 2019 12:41:46 -0400 Message-Id: <1558024913-26502-1-git-send-email-kdasu.kdev@gmail.com> X-Mailer: git-send-email 1.9.0.138.g2de3478 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190516_094205_647233_45840ECD X-CRM114-Status: GOOD ( 13.15 ) X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Vignesh Raghavendra , Kamal Dasu , Richard Weinberger , linux-kernel@vger.kernel.org, Marek Vasut , bcm-kernel-feedback-list@broadcom.com, Miquel Raynal , Brian Norris , David Woodhouse MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org Added a flag to indicate a panic_write so that low level drivers can use it to take required action where applicable, to ensure oops data gets written to assigned mtd device. Signed-off-by: Kamal Dasu --- drivers/mtd/mtdcore.c | 3 +++ include/linux/mtd/mtd.h | 6 ++++++ 2 files changed, 9 insertions(+) diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c index 76b4264..a83decd 100644 --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c @@ -1138,6 +1138,9 @@ int mtd_panic_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, return -EROFS; if (!len) return 0; + if (!mtd->oops_panic_write) + mtd->oops_panic_write = true; + return mtd->_panic_write(mtd, to, len, retlen, buf); } EXPORT_SYMBOL_GPL(mtd_panic_write); diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h index 677768b..791c34d 100644 --- a/include/linux/mtd/mtd.h +++ b/include/linux/mtd/mtd.h @@ -330,6 +330,12 @@ struct mtd_info { int (*_get_device) (struct mtd_info *mtd); void (*_put_device) (struct mtd_info *mtd); + /* + * flag indicates a panic write, low level drivers can take appropriate + * action if required to ensure writes go through + */ + bool oops_panic_write; + struct notifier_block reboot_notifier; /* default mode before reboot */ /* ECC status information */ -- 1.9.0.138.g2de3478 ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/