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authorDmitry Torokhov <dmitry.torokhov@gmail.com>2010-07-01 09:01:50 -0700
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2010-07-03 13:13:22 -0700
commit0f622bf465e78c390e13c5f4a14d0b3f8fb7c7e5 (patch)
treef261ab1f1707cdcd3b84e5661a3e0c332c8fcc21 /drivers
parentaf6e1d99ea525161f70f68ecb83d0d0f54f1bf62 (diff)
Input: ads7846 - do not allow altering platform data
Tested-by: Anatolij Gustschin <agust@denx.de> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/input/touchscreen/ads7846.c35
1 files changed, 19 insertions, 16 deletions
diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c
index 69210cb56c5..a3771607ead 100644
--- a/drivers/input/touchscreen/ads7846.c
+++ b/drivers/input/touchscreen/ads7846.c
@@ -878,14 +878,15 @@ static int __devinit setup_pendown(struct spi_device *spi, struct ads7846 *ts)
static int __devinit ads7846_probe(struct spi_device *spi)
{
- struct ads7846 *ts;
- struct ads7846_packet *packet;
- struct input_dev *input_dev;
- struct ads7846_platform_data *pdata = spi->dev.platform_data;
- struct spi_message *m;
- struct spi_transfer *x;
- int vref;
- int err;
+ struct ads7846 *ts;
+ struct ads7846_packet *packet;
+ struct input_dev *input_dev;
+ const struct ads7846_platform_data *pdata = spi->dev.platform_data;
+ struct spi_message *m;
+ struct spi_transfer *x;
+ unsigned long irq_flags;
+ int vref;
+ int err;
if (!spi->irq) {
dev_dbg(&spi->dev, "no IRQ?\n");
@@ -1174,20 +1175,22 @@ static int __devinit ads7846_probe(struct spi_device *spi)
goto err_put_regulator;
}
- if (!pdata->irq_flags)
- pdata->irq_flags = IRQF_TRIGGER_FALLING;
+ irq_flags = pdata->irq_flags ? : IRQF_TRIGGER_FALLING;
- if (request_irq(spi->irq, ads7846_irq, pdata->irq_flags,
- spi->dev.driver->name, ts)) {
+ err = request_irq(spi->irq, ads7846_irq, irq_flags,
+ spi->dev.driver->name, ts);
+
+ if (err && !pdata->irq_flags) {
dev_info(&spi->dev,
"trying pin change workaround on irq %d\n", spi->irq);
err = request_irq(spi->irq, ads7846_irq,
IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
spi->dev.driver->name, ts);
- if (err) {
- dev_dbg(&spi->dev, "irq %d busy?\n", spi->irq);
- goto err_disable_regulator;
- }
+ }
+
+ if (err) {
+ dev_dbg(&spi->dev, "irq %d busy?\n", spi->irq);
+ goto err_disable_regulator;
}
err = ads784x_hwmon_register(spi, ts);