media: ipu3-cio2: Request IRQ earlier

[ Upstream commit a069f79bfa ]

Call devm_request_irq() before registering the async notifier, as otherwise
it would be possible to use the device before the interrupts could be
delivered to the driver.

Fixes: c2a6a07afe ("media: intel-ipu3: cio2: add new MIPI-CSI2 driver")
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/media/pci/intel/ipu3/ipu3-cio2-main.c

@@ -1803,11 +1803,6 @@ static int cio2_pci_probe(struct pci_dev *pci_dev,
 
 	v4l2_async_notifier_init(&cio2->notifier);
 
-	/* Register notifier for subdevices we care */
-	r = cio2_parse_firmware(cio2);
-	if (r)
-		goto fail_clean_notifier;
-
 	r = devm_request_irq(dev, pci_dev->irq, cio2_irq, IRQF_SHARED,
 			     CIO2_NAME, cio2);
 	if (r) {
@@ -1815,6 +1810,11 @@ static int cio2_pci_probe(struct pci_dev *pci_dev,
 		goto fail_clean_notifier;
 	}
 
+	/* Register notifier for subdevices we care */
+	r = cio2_parse_firmware(cio2);
+	if (r)
+		goto fail_clean_notifier;
+
 	pm_runtime_put_noidle(dev);
 	pm_runtime_allow(dev);