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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>
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1 changed files with 8 additions and 2 deletions
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@ -740,8 +740,14 @@ nand_get_device(struct nand_chip *chip, struct mtd_info *mtd, int new_state)
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return 0;
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}
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if (new_state == FL_PM_SUSPENDED) {
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if (chip->controller->active->state == FL_PM_SUSPENDED) {
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chip->state = FL_PM_SUSPENDED;
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spin_unlock(lock);
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return (chip->state == FL_PM_SUSPENDED) ? 0 : -EAGAIN;
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return 0;
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} else {
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spin_unlock(lock);
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return -EAGAIN;
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}
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}
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set_current_state(TASK_UNINTERRUPTIBLE);
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add_wait_queue(wq, &wait);
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