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 <[email protected]> --- 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 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 */ -- 1.9.0.138.g2de3478
