diff options
Diffstat (limited to 'drivers/mtd/maps/l440gx.c')
| -rw-r--r-- | drivers/mtd/maps/l440gx.c | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/drivers/mtd/maps/l440gx.c b/drivers/mtd/maps/l440gx.c index 67620adf481..74bd98ee635 100644 --- a/drivers/mtd/maps/l440gx.c +++ b/drivers/mtd/maps/l440gx.c @@ -1,6 +1,4 @@ /* - * $Id: l440gx.c,v 1.18 2005/11/07 11:14:27 gleixner Exp $ - * * BIOS Flash chip on Intel 440GX board. * * Bugs this currently does not work under linuxBIOS. @@ -29,17 +27,21 @@ static struct mtd_info *mymtd; /* Is this really the vpp port? */ +static DEFINE_SPINLOCK(l440gx_vpp_lock); +static int l440gx_vpp_refcnt; static void l440gx_set_vpp(struct map_info *map, int vpp) { - unsigned long l; + unsigned long flags; - l = inl(VPP_PORT); + spin_lock_irqsave(&l440gx_vpp_lock, flags); if (vpp) { - l |= 1; + if (++l440gx_vpp_refcnt == 1) /* first nested 'on' */ + outl(inl(VPP_PORT) | 1, VPP_PORT); } else { - l &= ~1; + if (--l440gx_vpp_refcnt == 0) /* last nested 'off' */ + outl(inl(VPP_PORT) & ~1, VPP_PORT); } - outl(l, VPP_PORT); + spin_unlock_irqrestore(&l440gx_vpp_lock, flags); } static struct map_info l440gx_map = { @@ -140,7 +142,7 @@ static int __init init_l440gx(void) if (mymtd) { mymtd->owner = THIS_MODULE; - add_mtd_device(mymtd); + mtd_device_register(mymtd, NULL, 0); return 0; } @@ -150,7 +152,7 @@ static int __init init_l440gx(void) static void __exit cleanup_l440gx(void) { - del_mtd_device(mymtd); + mtd_device_unregister(mymtd); map_destroy(mymtd); iounmap(l440gx_map.virt); |