mtd: Stop updating erase_info->state and calling mtd_erase_callback()

MTD users are no longer checking erase_info->state to determine if the
erase operation failed or succeeded. Moreover, mtd_erase_callback() is
now a NOP.

We can safely get rid of all mtd_erase_callback() calls and all
erase_info->state assignments. While at it, get rid of the
erase_info->state field, all MTD_ERASE_XXX definitions and the
mtd_erase_callback() function.

Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Reviewed-by: Richard Weinberger <richard@nod.at>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Bert Kenward <bkenward@solarflare.com>
---
Changes in v2:
- Address a few coding style issues (reported by Miquel)
- Remove comments that are no longer valid (reported by Miquel)

1 files changed, 2 insertions, 10 deletions

diff --git a/drivers/mtd/devices/powernv_flash.c b/drivers/mtd/devices/powernv_flash.c
index 26f9feaa5d17..c1312b141ae0 100644
--- a/drivers/mtd/devices/powernv_flash.c
+++ b/drivers/mtd/devices/powernv_flash.c
@@ -175,19 +175,11 @@ static int powernv_flash_erase(struct mtd_info *mtd, struct erase_info *erase)
 {
 	int rc;
 
-	erase->state = MTD_ERASING;
-
-	/* todo: register our own notifier to do a true async implementation */
 	rc =  powernv_flash_async_op(mtd, FLASH_OP_ERASE, erase->addr,
 			erase->len, NULL, NULL);
-
-	if (rc) {
+	if (rc)
 		erase->fail_addr = erase->addr;
-		erase->state = MTD_ERASE_FAILED;
-	} else {
-		erase->state = MTD_ERASE_DONE;
-	}
-	mtd_erase_callback(erase);
+
 	return rc;
 }