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NAND: Scan bad blocks lazily.

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Rather than scanning on boot, scan upon the first attempt to check the
badness of a block.  This speeds up boot when not using NAND, and reduces
the likelihood of needing to reflash via JTAG if NAND becomes
nonfunctional.

Signed-off-by: Ilya Yanok <yanok@emcraft.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
This commit is contained in:
Ilya Yanok 2008-06-30 15:34:40 +02:00 • committed by Scott Wood
parent dfbf617ff0
commit 13f0fd94e3
2 changed files with 9 additions and 3 deletions
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2
include/linux/mtd/nand.h
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@ -204,6 +204,8 @@ typedef enum {
(e.g. because it needs them DMA-coherent */
#define NAND_OWN_BUFFERS 0x00040000
/* Options set by nand scan */
/* bbt has already been read */
#define NAND_BBT_SCANNED 0x40000000
/* Nand scan has allocated controller struct */
#define NAND_CONTROLLER_ALLOC 0x80000000