This performs the opposite of nand_register, allowing drivers to unregister nand devices. This is probably unnecessary for most regular drivers, but we expect sandbox drivers to get repeatedly bound/unbound, so this will help avoid dangling pointers.
Signed-off-by: Sean Anderson seanga2@gmail.com Reviewed-by: Dario Binacchi dario.binacchi@amarulasolutions.com ---
(no changes since v1)
drivers/mtd/nand/raw/nand.c | 17 +++++++++++++++++ include/nand.h | 1 + 2 files changed, 18 insertions(+)
diff --git a/drivers/mtd/nand/raw/nand.c b/drivers/mtd/nand/raw/nand.c index 3abd82068fb..80017b3dddd 100644 --- a/drivers/mtd/nand/raw/nand.c +++ b/drivers/mtd/nand/raw/nand.c @@ -74,6 +74,23 @@ int nand_register(int devnum, struct mtd_info *mtd) return 0; }
+void nand_unregister(struct mtd_info *mtd) +{ + int devnum = nand_mtd_to_devnum(mtd); + + if (devnum < 0) + return; + + if (nand_curr_device == devnum) + nand_curr_device = -1; + + total_nand_size -= mtd->size / 1024; + + del_mtd_device(nand_info[devnum]); + + nand_info[devnum] = NULL; +} + #if !CONFIG_IS_ENABLED(SYS_NAND_SELF_INIT) static void nand_init_chip(int i) { diff --git a/include/nand.h b/include/nand.h index c1d7533aaac..fc584f5ef7a 100644 --- a/include/nand.h +++ b/include/nand.h @@ -22,6 +22,7 @@ int nand_mtd_to_devnum(struct mtd_info *mtd); #if CONFIG_IS_ENABLED(SYS_NAND_SELF_INIT) void board_nand_init(void); int nand_register(int devnum, struct mtd_info *mtd); +void nand_unregister(struct mtd_info *mtd); #else struct nand_chip;