The patch titled
mtd/nand: fix multi-chip suspend problem
has been added to the -mm tree. Its filename is
mtd-nand-fix-multi-chip-suspend-problem.patch
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------------------------------------------------------
Subject: mtd/nand: fix multi-chip suspend problem
From: Li Yang <leoli@xxxxxxxxxxxxx>
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@xxxxxxxxxxxxx>
Signed-off-by: Li Yang <leoli@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/mtd/nand/nand_base.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)
diff -puN drivers/mtd/nand/nand_base.c~mtd-nand-fix-multi-chip-suspend-problem drivers/mtd/nand/nand_base.c
--- a/drivers/mtd/nand/nand_base.c~mtd-nand-fix-multi-chip-suspend-problem
+++ a/drivers/mtd/nand/nand_base.c
@@ -697,10 +697,16 @@ nand_get_device(struct nand_chip *chip,
spin_unlock(lock);
return 0;
}
- if (new_state == FL_PM_SUSPENDED) {
- spin_unlock(lock);
- return (chip->state == FL_PM_SUSPENDED) ? 0 : -EAGAIN;
- }
+ if (new_state == FL_PM_SUSPENDED)
+ 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);
spin_unlock(lock);
_
Patches currently in -mm which might be from leoli@xxxxxxxxxxxxx are
mtd-nand-fix-multi-chip-suspend-problem.patch
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