[PATCH v3 2/2] Bluetooth: btmtksdio: fix resume failure

[sean.wang at mediatek.com]

From: Sean Wang <sean.wang at mediatek.com>

btmtksdio have to rely on MMC_PM_KEEP_POWER in pm_flags to avoid that
SDIO power is being shut off during the device is in suspend. That fixes
the SDIO command fails to access the bus after the device is resumed.

Fixes: 7f3c563c575e7 ("Bluetooth: btmtksdio: Add runtime PM support to SDIO based Bluetooth")
Co-developed-by: Mark-yw Chen <mark-yw.chen at mediatek.com>
Signed-off-by: Mark-yw Chen <mark-yw.chen at mediatek.com>
Signed-off-by: Sean Wang <sean.wang at mediatek.com>
---
v2: rebase and resend
v3: no change
---
 drivers/bluetooth/btmtksdio.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/bluetooth/btmtksdio.c b/drivers/bluetooth/btmtksdio.c
index fc6317e519e9..143404745240 100644
--- a/drivers/bluetooth/btmtksdio.c
+++ b/drivers/bluetooth/btmtksdio.c
@@ -1065,6 +1065,8 @@ static int btmtksdio_runtime_suspend(struct device *dev)
 	if (!test_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state))
 		return 0;
 
+	sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
+
 	sdio_claim_host(bdev->func);
 
 	sdio_writel(bdev->func, C_FW_OWN_REQ_SET, MTK_REG_CHLPCR, &err);
-- 
2.25.1