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| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2009-05-23 23:18:40 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-05-23 23:18:40 +0100 |
| commit | fc05505b77f7900a1bb74fb3f3a4343dee4265a4 (patch) | |
| tree | 6517919cb60bd9465078512cacbefd8c77f94b76 /drivers/mtd/devices/m25p80.c | |
| parent | a2ab67fae1ab9226679495a8d260f4e6555efc5f (diff) | |
| parent | 11c79740d3c03cb81f84e98cf2e2dbd8d9bb53cd (diff) | |
Merge branch 'ixp4xx' of git://git.kernel.org/pub/scm/linux/kernel/git/chris/linux-2.6 into devel
Diffstat (limited to 'drivers/mtd/devices/m25p80.c')
| -rw-r--r-- | drivers/mtd/devices/m25p80.c | 26 |
1 files changed, 14 insertions, 12 deletions
diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c index 8185b1f3e5e6..cc6369ea67dd 100644 --- a/drivers/mtd/devices/m25p80.c +++ b/drivers/mtd/devices/m25p80.c @@ -54,7 +54,7 @@ #define SR_SRWD 0x80 /* SR write protect */ /* Define max times to check status register before we give up. */ -#define MAX_READY_WAIT_COUNT 100000 +#define MAX_READY_WAIT_JIFFIES (10 * HZ) /* eg. M25P128 specs 6s max sector erase */ #define CMD_SIZE 4 #ifdef CONFIG_M25PXX_USE_FAST_READ @@ -139,20 +139,20 @@ static inline int write_enable(struct m25p *flash) */ static int wait_till_ready(struct m25p *flash) { - int count; + unsigned long deadline; int sr; - /* one chip guarantees max 5 msec wait here after page writes, - * but potentially three seconds (!) after page erase. - */ - for (count = 0; count < MAX_READY_WAIT_COUNT; count++) { + deadline = jiffies + MAX_READY_WAIT_JIFFIES; + + do { if ((sr = read_sr(flash)) < 0) break; else if (!(sr & SR_WIP)) return 0; - /* REVISIT sometimes sleeping would be best */ - } + cond_resched(); + + } while (!time_after_eq(jiffies, deadline)); return 1; } @@ -246,10 +246,12 @@ static int m25p80_erase(struct mtd_info *mtd, struct erase_info *instr) mutex_lock(&flash->lock); /* whole-chip erase? */ - if (len == flash->mtd.size && erase_chip(flash)) { - instr->state = MTD_ERASE_FAILED; - mutex_unlock(&flash->lock); - return -EIO; + if (len == flash->mtd.size) { + if (erase_chip(flash)) { + instr->state = MTD_ERASE_FAILED; + mutex_unlock(&flash->lock); + return -EIO; + } /* REVISIT in some cases we could speed up erasing large regions * by using OPCODE_SE instead of OPCODE_BE_4K. We may have set up |