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

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Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Nicolas Pitre 2005-11-23 22:07:56 +00:00 committed by Thomas Gleixner
parent 7ac571f8d0
commit 8bc3b3804a
1 changed files with 4 additions and 6 deletions
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10
drivers/mtd/chips/cfi_cmdset_0001.c
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@ -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);
}