[MTD] cfi_cmdset_0001: relax locking rules for multi hardware partition support

 *

 * (C) 2000 Red Hat. GPL'd

 *

 * $Id: cfi_cmdset_0001.c,v 1.185 2005/11/07 11:14:22 gleixner Exp $

 * $Id: cfi_cmdset_0001.c,v 1.186 2005/11/23 22:07:52 nico Exp $

 *

 *

 * 10/10/2000	Nicolas Pitre <nico@cam.org>

		 *

		 * - contension arbitration is handled in the owner's context.

		 *

		 * The 'shared' struct can be read when its lock is taken.

		 * However any writes to it can only be made when the current

		 * owner's lock is also held.

		 * The 'shared' struct can be read and/or written only when

		 * its lock is taken.

		 */

		struct flchip_shared *shared = chip->priv;

		struct flchip *contender;

			}

			timeo = jiffies + HZ;

			spin_lock(&shared->lock);

			spin_unlock(contender->mutex);

		}

		/* We now own it */

		shared->writing = chip;

		if (mode == FL_ERASING)

			shared->erasing = chip;

		if (contender && contender != chip)

			spin_unlock(contender->mutex);

		spin_unlock(&shared->lock);

	}