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mtd: nand: fix multi-chip suspend problem 

Symptom:
device_suspend(): mtd_cls_suspend+0x0/0x58 returns -11
PM: Device mtd14 failed to suspend: error -11
PM: Some devices failed to suspend

This patch enables other chips to be suspended if the active chip of
the controller has been suspended.

Signed-off-by: Jin Qing <b24347@freescale.com>
Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Li Yang 2009-11-17 14:45:49 -08:00 committed by David Woodhouse
parent 4a58948669
commit 6b0d9a8412
1 changed files with 8 additions and 2 deletions
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10
drivers/mtd/nand/nand_base.c
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@ -740,8 +740,14 @@ nand_get_device(struct nand_chip *chip, struct mtd_info *mtd, int new_state)
return 0;
}
if (new_state == FL_PM_SUSPENDED) {
spin_unlock(lock);
return (chip->state == FL_PM_SUSPENDED) ? 0 : -EAGAIN;
if (chip->controller->active->state == FL_PM_SUSPENDED) {
chip->state = FL_PM_SUSPENDED;
spin_unlock(lock);
return 0;
} else {
spin_unlock(lock);
return -EAGAIN;
}
}
set_current_state(TASK_UNINTERRUPTIBLE);
add_wait_queue(wq, &wait);