diff options
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/devices/m25p80.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c index dfadef84c052..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 1000000 +#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; } |
