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Commit 6b316715 authored by Jani Nikula's avatar Jani Nikula Committed by Tomi Valkeinen
Browse files

OMAP: DSS2: Taal: Add locks to protect taal data access 



Avoid potential race conditions in sysfs access to taal data.

Signed-off-by: default avatarJani Nikula <ext-jani.1.nikula@nokia.com>
Signed-off-by: default avatarTomi Valkeinen <tomi.valkeinen@nokia.com>
parent 006db7b4

drivers/video/omap2/displays/panel-taal.c

+12 −0
Original line number Diff line number Diff line
@@ -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;

}