tree 0156e9b9996cf43dd67ceed53a2b8da0a516cdec
parent 7ca6448dbfb398bba36eda3c01bc14b86c3675be
author Thomas Gleixner <tglx@linutronix.de> 1117568360 +0100
committer Thomas Gleixner <tglx@mtd.linutronix.de> 1120047317 +0200

[MTD] NAND: Reorganize chip locking

The code was wrong in several aspects. The locking order was
inconsistent, the device aquire code did not reset a variable
after a wakeup and the wakeup handling was not working for
applications where multiple chips are sharing a single
hardware controller.
When a hardware controller is available the locking is now
reduced to the hardware controller lock and the waitqueue is
moved to the hardware controller structure in order to avoid
a wake_up_all().

The problem was pointed out by Ben Dooks, who also found the
missing variable reset as main cause for his deadlock problem.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>