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

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c
index 143f01a..69c0494 100644 (file)
--- a/drivers/mtd/chips/cfi_cmdset_0001.c
+++ b/drivers/mtd/chips/cfi_cmdset_0001.c
@@ -4,7 +4,7 @@
  *
  * (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>
@@ -644,9 +644,8 @@ static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr
                 *
                 * - 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;
@@ -675,14 +674,13 @@ static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr
                        }
                        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);
        }