Commit 9f897bfd authored by Kamal Dasu's avatar Kamal Dasu Committed by Miquel Raynal
Browse files

mtd: Add flag to indicate panic_write 



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: default avatarKamal Dasu <kdasu.kdev@gmail.com>
Signed-off-by: default avatarMiquel Raynal <miquel.raynal@bootlin.com>
parent 33535b85

drivers/mtd/mtdcore.c

+3 −0
Original line number Diff line number Diff line
@@ -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;

	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);

include/linux/mtd/mtd.h

+6 −0
Original line number Diff line number Diff line
@@ -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 oops_panic_write;



	struct notifier_block reboot_notifier;  /* default mode before reboot */



	/* ECC status information */

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