diff options
| author |   Jani Nikula <ext-jani.1.nikula@nokia.com> | 2010-04-28 11:15:18 +0300 |
|---|---|---|
| committer |   Tomi Valkeinen <tomi.valkeinen@nokia.com> | 2010-08-03 15:18:47 +0300 |
| commit | 6b316715b4b96da49fcac0fa07082692eebca8af (patch) | |
| tree | 0115f766399a859e5bdd831166b9ac7fa40c0467 /drivers/video/omap2/displays | |
| parent | OMAP: DSS2: Taal: Add panel hardware reset (diff) | |
| download | linux-dev-6b316715b4b96da49fcac0fa07082692eebca8af.tar.xz linux-dev-6b316715b4b96da49fcac0fa07082692eebca8af.zip | |
OMAP: DSS2: Taal: Add locks to protect taal data access
Avoid potential race conditions in sysfs access to taal data.
Signed-off-by: Jani Nikula <ext-jani.1.nikula@nokia.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
Diffstat (limited to 'drivers/video/omap2/displays')
| -rw-r--r-- | drivers/video/omap2/displays/panel-taal.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/video/omap2/displays/panel-taal.c b/drivers/video/omap2/displays/panel-taal.c index 8fbb94e2bf5d..0eed3282a7a5 100644 --- a/drivers/video/omap2/displays/panel-taal.c +++ b/drivers/video/omap2/displays/panel-taal.c @@ -364,6 +364,8 @@ static ssize_t taal_num_errors_show(struct device *dev, u8 errors; int r; + mutex_lock(&td->lock); + if (td->enabled) { dsi_bus_lock(); r = taal_dcs_read_1(DCS_READ_NUM_ERRORS, &errors); @@ -372,6 +374,8 @@ static ssize_t taal_num_errors_show(struct device *dev, r = -ENODEV; } + mutex_unlock(&td->lock); + if (r) return r; @@ -386,6 +390,8 @@ static ssize_t taal_hw_revision_show(struct device *dev, u8 id1, id2, id3; int r; + mutex_lock(&td->lock); + if (td->enabled) { dsi_bus_lock(); r = taal_get_id(&id1, &id2, &id3); @@ -394,6 +400,8 @@ static ssize_t taal_hw_revision_show(struct device *dev, r = -ENODEV; } + mutex_unlock(&td->lock); + if (r) return r; @@ -443,6 +451,8 @@ static ssize_t store_cabc_mode(struct device *dev, if (i == ARRAY_SIZE(cabc_modes)) return -EINVAL; + mutex_lock(&td->lock); + if (td->enabled) { dsi_bus_lock(); if (!td->cabc_broken) @@ -452,6 +462,8 @@ static ssize_t store_cabc_mode(struct device *dev, td->cabc_mode = i; + mutex_unlock(&td->lock); + return count; } |