From: Tokunori Ikegami <ikegami@allied-telesis.co.jp>
Date: Wed, 30 May 2018 09:32:29 +0000 (+0900)
Subject: mtd: cfi_cmdset_0002: Change erase functions to check chip good only
X-Git-Tag: v4.18-rc1~90^2~3
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=79ca484b613041ca223f74b34608bb6f5221724b;p=linux.git

mtd: cfi_cmdset_0002: Change erase functions to check chip good only

Currently the functions use to check both chip ready and good.
But the chip ready is not enough to check the operation status.
So change this to check the chip good instead of this.
About the retry functions to make sure the error handling remain it.

Signed-off-by: Tokunori Ikegami <ikegami@allied-telesis.co.jp>
Reviewed-by: Joakim Tjernlund <Joakim.Tjernlund@infinera.com>
Cc: Chris Packham <chris.packham@alliedtelesis.co.nz>
Cc: Brian Norris <computersforpeace@gmail.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Boris Brezillon <boris.brezillon@free-electrons.com>
Cc: Marek Vasut <marek.vasut@gmail.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
Cc: linux-mtd@lists.infradead.org
Cc: stable@vger.kernel.org
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
---

diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c
index 217db661943d..d8e3a737c62f 100644
--- a/drivers/mtd/chips/cfi_cmdset_0002.c
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -2294,12 +2294,13 @@ static int __xipram do_erase_chip(struct map_info *map, struct flchip *chip)
 			chip->erase_suspended = 0;
 		}
 
-		if (chip_ready(map, adr))
+		if (chip_good(map, adr, map_word_ff(map)))
 			break;
 
 		if (time_after(jiffies, timeo)) {
 			printk(KERN_WARNING "MTD %s(): software timeout\n",
 			       __func__);
+			ret = -EIO;
 			break;
 		}
 
@@ -2307,15 +2308,15 @@ static int __xipram do_erase_chip(struct map_info *map, struct flchip *chip)
 		UDELAY(map, chip, adr, 1000000/HZ);
 	}
 	/* Did we succeed? */
-	if (!chip_good(map, adr, map_word_ff(map))) {
+	if (ret) {
 		/* reset on all failures. */
 		map_write(map, CMD(0xF0), chip->start);
 		/* FIXME - should have reset delay before continuing */
 
-		if (++retry_cnt <= MAX_RETRIES)
+		if (++retry_cnt <= MAX_RETRIES) {
+			ret = 0;
 			goto retry;
-
-		ret = -EIO;
+		}
 	}
 
 	chip->state = FL_READY;
@@ -2388,7 +2389,7 @@ static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip,
 			chip->erase_suspended = 0;
 		}
 
-		if (chip_ready(map, adr)) {
+		if (chip_good(map, adr, map_word_ff(map))) {
 			xip_enable(map, chip, adr);
 			break;
 		}
@@ -2397,6 +2398,7 @@ static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip,
 			xip_enable(map, chip, adr);
 			printk(KERN_WARNING "MTD %s(): software timeout\n",
 			       __func__);
+			ret = -EIO;
 			break;
 		}
 
@@ -2404,15 +2406,15 @@ static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip,
 		UDELAY(map, chip, adr, 1000000/HZ);
 	}
 	/* Did we succeed? */
-	if (!chip_good(map, adr, map_word_ff(map))) {
+	if (ret) {
 		/* reset on all failures. */
 		map_write(map, CMD(0xF0), chip->start);
 		/* FIXME - should have reset delay before continuing */
 
-		if (++retry_cnt <= MAX_RETRIES)
+		if (++retry_cnt <= MAX_RETRIES) {
+			ret = 0;
 			goto retry;
-
-		ret = -EIO;
+		}
 	}
 
 	chip->state = FL_READY;