diff options
| author | Len Brown <len.brown@intel.com> | 2012-04-07 03:48:59 +0200 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2012-04-07 03:48:59 +0200 |
| commit | eeaab2d8af2cf1d36d7086f22e9de42d6dd2995c (patch) | |
| tree | 369b9c91a6d808944f07d2290fec6f9fe2731904 /drivers/mtd/maps/l440gx.c | |
| parent | cpuidle: Fix panic in CPU off-lining with no idle driver (diff) | |
| parent | MAINTAINERS: Update git url for ACPI (diff) | |
| download | linux-eeaab2d8af2cf1d36d7086f22e9de42d6dd2995c.tar.xz linux-eeaab2d8af2cf1d36d7086f22e9de42d6dd2995c.zip | |
Merge branches 'idle-fix' and 'misc' into release
Diffstat (limited to 'drivers/mtd/maps/l440gx.c')
| -rw-r--r-- | drivers/mtd/maps/l440gx.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/mtd/maps/l440gx.c b/drivers/mtd/maps/l440gx.c index dd0360ba2412..74bd98ee635f 100644 --- a/drivers/mtd/maps/l440gx.c +++ b/drivers/mtd/maps/l440gx.c @@ -27,17 +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 = { |