nand: Add function to unregister NAND devices
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>
diff --git a/drivers/mtd/nand/raw/nand.c b/drivers/mtd/nand/raw/nand.c
index 3abd820..80017b3 100644
--- a/drivers/mtd/nand/raw/nand.c
+++ b/drivers/mtd/nand/raw/nand.c
@@ -74,6 +74,23 @@
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)
{