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OMAP: DSS2: OMAPFB: Add some locking debug checks

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Trigger WARN_ON() messages from various places in the code in case the
memory region is not currently locked.

Signed-off-by: Ville Syrjälä <ville.syrjala@nokia.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
This commit is contained in:
Ville Syrjälä
2010-03-17 21:28:50 +02:00
committed by Tomi Valkeinen
parent 3d84b65aa6
commit 1ceafc0091
4 changed files with 13 additions and 0 deletions
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2
drivers/video/omap2/omapfb/omapfb-sysfs.c
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@@ -453,6 +453,7 @@ static ssize_t store_size(struct device *dev, struct device_attribute *attr,
rg = ofbi->region;
down_write_nested(&rg->lock, rg->id);
atomic_inc(&rg->lock_count);
if (atomic_read(&rg->map_count)) {
r = -EBUSY;
@@ -484,6 +485,7 @@ static ssize_t store_size(struct device *dev, struct device_attribute *attr,
r = count;
out:
atomic_dec(&rg->lock_count);
up_write(&rg->lock);
unlock_fb_info(fbi);