mtd: nand: pxa3xx: Clean pxa_ecc_init() error handling

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Gitweb:     http://git.infradead.org/?p=mtd-2.6.git;a=commit;h=eee0166d8ead9d719d794df3e66acd8f83630e05
Commit:     eee0166d8ead9d719d794df3e66acd8f83630e05
Parent:     67a9ad9b8a6f6ea76ef8fc484ae49970d72d5534
Author:     Ezequiel Garcia <ezequiel.garcia at free-electrons.com>
AuthorDate: Wed May 14 14:58:07 2014 -0300
Committer:  Brian Norris <computersforpeace at gmail.com>
CommitDate: Wed May 21 12:55:08 2014 -0700

    mtd: nand: pxa3xx: Clean pxa_ecc_init() error handling
    
    Let's make pxa_ecc_init() return a negative errno on error or zero
    if succesful, which is standard kernel practice. Also, report the
    selected ECC strength and step size, which is important information.
    
    Signed-off-by: Ezequiel Garcia <ezequiel.garcia at free-electrons.com>
    Signed-off-by: Brian Norris <computersforpeace at gmail.com>
---
 drivers/mtd/nand/pxa3xx_nand.c | 21 ++++++++++-----------
 1 file changed, 10 insertions(+), 11 deletions(-)

diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
index 940e6c7..3b66a64 100644
--- a/drivers/mtd/nand/pxa3xx_nand.c
+++ b/drivers/mtd/nand/pxa3xx_nand.c
@@ -1354,7 +1354,6 @@ static int pxa_ecc_init(struct pxa3xx_nand_info *info,
 		ecc->mode = NAND_ECC_HW;
 		ecc->size = 512;
 		ecc->strength = 1;
-		return 1;
 
 	} else if (strength == 1 && ecc_stepsize == 512 && page_size == 512) {
 		info->chunk_size = 512;
@@ -1363,7 +1362,6 @@ static int pxa_ecc_init(struct pxa3xx_nand_info *info,
 		ecc->mode = NAND_ECC_HW;
 		ecc->size = 512;
 		ecc->strength = 1;
-		return 1;
 
 	/*
 	 * Required ECC: 4-bit correction per 512 bytes
@@ -1378,7 +1376,6 @@ static int pxa_ecc_init(struct pxa3xx_nand_info *info,
 		ecc->size = info->chunk_size;
 		ecc->layout = &ecc_layout_2KB_bch4bit;
 		ecc->strength = 16;
-		return 1;
 
 	} else if (strength == 4 && ecc_stepsize == 512 && page_size == 4096) {
 		info->ecc_bch = 1;
@@ -1389,7 +1386,6 @@ static int pxa_ecc_init(struct pxa3xx_nand_info *info,
 		ecc->size = info->chunk_size;
 		ecc->layout = &ecc_layout_4KB_bch4bit;
 		ecc->strength = 16;
-		return 1;
 
 	/*
 	 * Required ECC: 8-bit correction per 512 bytes
@@ -1404,8 +1400,15 @@ static int pxa_ecc_init(struct pxa3xx_nand_info *info,
 		ecc->size = info->chunk_size;
 		ecc->layout = &ecc_layout_4KB_bch8bit;
 		ecc->strength = 16;
-		return 1;
+	} else {
+		dev_err(&info->pdev->dev,
+			"ECC strength %d at page size %d is not supported\n",
+			strength, page_size);
+		return -ENODEV;
 	}
+
+	dev_info(&info->pdev->dev, "ECC strength %d, ECC step size %d\n",
+		 ecc->strength, ecc->size);
 	return 0;
 }
 
@@ -1527,12 +1530,8 @@ KEEP_CONFIG:
 
 	ret = pxa_ecc_init(info, &chip->ecc, ecc_strength,
 			   ecc_step, mtd->writesize);
-	if (!ret) {
-		dev_err(&info->pdev->dev,
-			"ECC strength %d at page size %d is not supported\n",
-			ecc_strength, mtd->writesize);
-		return -ENODEV;
-	}
+	if (ret)
+		return ret;
 
 	/* calculate addressing information */
 	if (mtd->writesize >= 2048)