[v4,1/2] mtd: Add flag to indicate panic_write
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Message ID 1560882420-727-1-git-send-email-kdasu.kdev@gmail.com
State New
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Series
  • [v4,1/2] mtd: Add flag to indicate panic_write
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Commit Message

Kamal Dasu June 18, 2019, 6:26 p.m. UTC
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 <kdasu.kdev@gmail.com>
---
 drivers/mtd/mtdcore.c   | 3 +++
 include/linux/mtd/mtd.h | 6 ++++++
 2 files changed, 9 insertions(+)

Comments

Miquel Raynal July 1, 2019, 7:12 a.m. UTC | #1
Hi Kamal,

Kamal Dasu <kdasu.kdev@gmail.com> wrote on Tue, 18 Jun 2019 14:26:42
-0400:

> 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 <kdasu.kdev@gmail.com>
> ---

Applied to nand/next, thanks.

Miquèl

Patch
diff mbox series

diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
index 453242d..2e04627 100644
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -1124,6 +1124,9 @@  int mtd_panic_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen,
 		return -EROFS;
 	if (!len)
 		return 0;
+
+	mtd->panic_write_triggered = 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 936a3fd..02dce49 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -316,6 +316,12 @@  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 panic_write_triggered;
+
 	struct notifier_block reboot_notifier;  /* default mode before reboot */
 
 	/* ECC status information */