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Subject[PATCH 4.4 093/108] Bluetooth: btsdio: Do not bind to non-removable BCM43341
Date
4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Hans de Goede <hdegoede@redhat.com>

commit b4cdaba274247c9c841c6a682c08fa91fb3aa549 upstream.

BCM43341 devices soldered onto the PCB (non-removable) always (AFAICT)
use an UART connection for bluetooth. But they also advertise btsdio
support on their 3th sdio function, this causes 2 problems:

1) A non functioning BT HCI getting registered

2) Since the btsdio driver does not have suspend/resume callbacks,
mmc_sdio_pre_suspend will return -ENOSYS, causing mmc_pm_notify()
to react as if the SDIO-card is removed and since the slot is
marked as non-removable it will never get detected as inserted again.
Which results in wifi no longer working after a suspend/resume.

This commit fixes both by making btsdio ignore BCM43341 devices
when connected to a slot which is marked non-removable.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/bluetooth/btsdio.c | 9 +++++++++
1 file changed, 9 insertions(+)

--- a/drivers/bluetooth/btsdio.c
+++ b/drivers/bluetooth/btsdio.c
@@ -31,6 +31,7 @@
#include <linux/errno.h>
#include <linux/skbuff.h>

+#include <linux/mmc/host.h>
#include <linux/mmc/sdio_ids.h>
#include <linux/mmc/sdio_func.h>

@@ -291,6 +292,14 @@ static int btsdio_probe(struct sdio_func
tuple = tuple->next;
}

+ /* BCM43341 devices soldered onto the PCB (non-removable) use an
+ * uart connection for bluetooth, ignore the BT SDIO interface.
+ */
+ if (func->vendor == SDIO_VENDOR_ID_BROADCOM &&
+ func->device == SDIO_DEVICE_ID_BROADCOM_43341 &&
+ !mmc_card_is_removable(func->card->host))
+ return -ENODEV;
+
data = devm_kzalloc(&func->dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;

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