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Bluetooth: btsdio: Do not bind to non-removable BCM43341

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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.

Cc: stable@vger.kernel.org
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Hans de Goede 2017-11-29 20:29:07 +01:00 committed by Marcel Holtmann
parent c23fae1111
commit b4cdaba274
1 changed files with 9 additions and 0 deletions
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9
drivers/bluetooth/btsdio.c
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@ -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>
@ -292,6 +293,14 @@ static int btsdio_probe(struct sdio_func *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;