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authorJohan Hovold <johan@kernel.org>2019-01-22 20:22:53 +0300
committerJohan Hovold <johan@kernel.org>2019-01-25 12:58:52 +0300
commit82f844c22588bf47132c82faeda50b6db473162c (patch)
tree5042e51ce950d2bee376ae0a658d0684454d3552 /drivers/gnss
parent49a57857aeea06ca831043acbb0fa5e0f50602fd (diff)
downloadlinux-82f844c22588bf47132c82faeda50b6db473162c.tar.xz
gnss: sirf: fix premature wakeup interrupt enable
Make sure the receiver is powered (and booted) before enabling the wakeup interrupt to avoid spurious interrupts due to a floating input. Similarly, disable the interrupt before powering off on probe errors and on unbind. Fixes: d2efbbd18b1e ("gnss: add driver for sirfstar-based receivers") Cc: stable <stable@vger.kernel.org> # 4.19 Signed-off-by: Johan Hovold <johan@kernel.org>
Diffstat (limited to 'drivers/gnss')
-rw-r--r--drivers/gnss/sirf.c32
1 files changed, 17 insertions, 15 deletions
diff --git a/drivers/gnss/sirf.c b/drivers/gnss/sirf.c
index 226f6e6fe01b..8e3f6a776e02 100644
--- a/drivers/gnss/sirf.c
+++ b/drivers/gnss/sirf.c
@@ -310,30 +310,26 @@ static int sirf_probe(struct serdev_device *serdev)
ret = -ENODEV;
goto err_put_device;
}
+
+ ret = regulator_enable(data->vcc);
+ if (ret)
+ goto err_put_device;
+
+ /* Wait for chip to boot into hibernate mode. */
+ msleep(SIRF_BOOT_DELAY);
}
if (data->wakeup) {
ret = gpiod_to_irq(data->wakeup);
if (ret < 0)
- goto err_put_device;
-
+ goto err_disable_vcc;
data->irq = ret;
- ret = devm_request_threaded_irq(dev, data->irq, NULL,
- sirf_wakeup_handler,
+ ret = request_threaded_irq(data->irq, NULL, sirf_wakeup_handler,
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
"wakeup", data);
if (ret)
- goto err_put_device;
- }
-
- if (data->on_off) {
- ret = regulator_enable(data->vcc);
- if (ret)
- goto err_put_device;
-
- /* Wait for chip to boot into hibernate mode */
- msleep(SIRF_BOOT_DELAY);
+ goto err_disable_vcc;
}
if (IS_ENABLED(CONFIG_PM)) {
@@ -342,7 +338,7 @@ static int sirf_probe(struct serdev_device *serdev)
} else {
ret = sirf_runtime_resume(dev);
if (ret < 0)
- goto err_disable_vcc;
+ goto err_free_irq;
}
ret = gnss_register_device(gdev);
@@ -356,6 +352,9 @@ err_disable_rpm:
pm_runtime_disable(dev);
else
sirf_runtime_suspend(dev);
+err_free_irq:
+ if (data->wakeup)
+ free_irq(data->irq, data);
err_disable_vcc:
if (data->on_off)
regulator_disable(data->vcc);
@@ -376,6 +375,9 @@ static void sirf_remove(struct serdev_device *serdev)
else
sirf_runtime_suspend(&serdev->dev);
+ if (data->wakeup)
+ free_irq(data->irq, data);
+
if (data->on_off)
regulator_disable(data->vcc);