diff mbox

[RFC,35/47] mtd: nand: stm_nand_bch: dump bad blocks

Message ID 1395735604-26706-36-git-send-email-lee.jones@linaro.org
State New
Headers show

Commit Message

Lee Jones March 25, 2014, 8:19 a.m. UTC
Inform the user of any known bad blocks during initialisation.
Conversely, if there aren't any known bad blocks, let the user know
the good news.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/mtd/nand/stm_nand_bch.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

Comments

Ezequiel Garcia March 25, 2014, 12:53 p.m. UTC | #1
On Mar 25, Lee Jones wrote:
> Inform the user of any known bad blocks during initialisation.
> Conversely, if there aren't any known bad blocks, let the user know
> the good news.
> 
> Signed-off-by: Lee Jones <lee.jones@linaro.org>
> ---
>  drivers/mtd/nand/stm_nand_bch.c | 24 ++++++++++++++++++++++++
>  1 file changed, 24 insertions(+)
> 
> diff --git a/drivers/mtd/nand/stm_nand_bch.c b/drivers/mtd/nand/stm_nand_bch.c
> index 6698b1f..abbb4d9 100644
> --- a/drivers/mtd/nand/stm_nand_bch.c
> +++ b/drivers/mtd/nand/stm_nand_bch.c
> @@ -1060,6 +1060,28 @@ static int bch_load_bbt(struct nandi_controller *nandi,
>  	return 0;
>  }
>  
> +static void nandi_dump_bad_blocks(struct nandi_controller *nandi)
> +{
> +	int bad_count = 0;
> +	uint32_t block;
> +	uint8_t *bbt = nandi->info.bbt_info.bbt;
> +	uint8_t mark;
> +
> +	pr_info("BBT:\n");
> +	for (block = 0; block < nandi->blocks_per_device; block++) {
> +		mark = bbt_get_block_mark(bbt, block);
> +		if (mark != BBT_MARK_GOOD) {
> +			pr_info("\t\tBlock 0x%08x [%05u] marked bad [%s]\n",
> +				block << nandi->block_shift, block,
> +				(mark == BBT_MARK_BAD_FACTORY) ?
> +				"Factory" : "Wear");
> +			bad_count++;
> +		}
> +	}
> +	if (bad_count == 0)
> +		pr_info("\t\tNo bad blocks listed in BBT\n");
> +}
> +
>  /*
>   * Initialisation
>   */
> @@ -1849,6 +1871,8 @@ static int stm_nand_bch_probe(struct platform_device *pdev)
>  			return err;
>  	}
>  
> +	nandi_dump_bad_blocks(nandi);
> +

Hm... this looks suspicious. Are you sure you need this?

The NAND BBT code prints the bad blocks at initialization-time. If that's
not the case for you, perhaps we should be fixing that in the BBT code,
rather than at a driver's level.
diff mbox

Patch

diff --git a/drivers/mtd/nand/stm_nand_bch.c b/drivers/mtd/nand/stm_nand_bch.c
index 6698b1f..abbb4d9 100644
--- a/drivers/mtd/nand/stm_nand_bch.c
+++ b/drivers/mtd/nand/stm_nand_bch.c
@@ -1060,6 +1060,28 @@  static int bch_load_bbt(struct nandi_controller *nandi,
 	return 0;
 }
 
+static void nandi_dump_bad_blocks(struct nandi_controller *nandi)
+{
+	int bad_count = 0;
+	uint32_t block;
+	uint8_t *bbt = nandi->info.bbt_info.bbt;
+	uint8_t mark;
+
+	pr_info("BBT:\n");
+	for (block = 0; block < nandi->blocks_per_device; block++) {
+		mark = bbt_get_block_mark(bbt, block);
+		if (mark != BBT_MARK_GOOD) {
+			pr_info("\t\tBlock 0x%08x [%05u] marked bad [%s]\n",
+				block << nandi->block_shift, block,
+				(mark == BBT_MARK_BAD_FACTORY) ?
+				"Factory" : "Wear");
+			bad_count++;
+		}
+	}
+	if (bad_count == 0)
+		pr_info("\t\tNo bad blocks listed in BBT\n");
+}
+
 /*
  * Initialisation
  */
@@ -1849,6 +1871,8 @@  static int stm_nand_bch_probe(struct platform_device *pdev)
 			return err;
 	}
 
+	nandi_dump_bad_blocks(nandi);
+
 	return 0;
 }