Re: [PATCH 1/5] Bluetooth: hci_bcm: Add irq_polarity module option

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Hi Marcel, et al.,

On 16-03-18 21:28, Hans de Goede wrote:
Add irq_polarity module option for easier troubleshooting of irq-polarity
issues.

Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>

Marcel, is there any reason why this (bug-fix) series is not merged
yet? Any review remarks I missed?

Regards,

Hans



---
  drivers/bluetooth/hci_bcm.c | 20 +++++++++++++++-----
  1 file changed, 15 insertions(+), 5 deletions(-)

diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c
index 5e3aba3c3185..bb6cd1623132 100644
--- a/drivers/bluetooth/hci_bcm.c
+++ b/drivers/bluetooth/hci_bcm.c
@@ -126,6 +126,10 @@ struct bcm_data {
  static DEFINE_MUTEX(bcm_device_lock);
  static LIST_HEAD(bcm_device_list);
+static int irq_polarity = -1;
+module_param(irq_polarity, int, 0444);
+MODULE_PARM_DESC(irq_polarity, "IRQ polarity 0: active-high 1: active-low");
+
  static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed)
  {
  	if (hu->serdev)
@@ -988,11 +992,17 @@ static int bcm_acpi_probe(struct bcm_device *dev)
  	}
  	acpi_dev_free_resource_list(&resources);
- dmi_id = dmi_first_match(bcm_active_low_irq_dmi_table);
-	if (dmi_id) {
-		dev_warn(dev->dev, "%s: Overwriting IRQ polarity to active low",
-			    dmi_id->ident);
-		dev->irq_active_low = true;
+	if (irq_polarity != -1) {
+		dev->irq_active_low = irq_polarity;
+		dev_warn(dev->dev, "Overwriting IRQ polarity to active %s by module-param\n",
+			 dev->irq_active_low ? "low" : "high");
+	} else {
+		dmi_id = dmi_first_match(bcm_active_low_irq_dmi_table);
+		if (dmi_id) {
+			dev_warn(dev->dev, "%s: Overwriting IRQ polarity to active low",
+				 dmi_id->ident);
+			dev->irq_active_low = true;
+		}
  	}
return 0;

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