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

Message ID 6c659099972f1d3ab76087140ddb3c8e13eea923.1638383119.git.objelf@gmail.com (mailing list archive)
State New, archived
Headers show
Series [v3,1/2] Bluetooth: btmtksdio: handle runtime pm only when sdio_func is available | expand

Commit Message

Sean Wang Dec. 1, 2021, 6:28 p.m. UTC 
From: Sean Wang <sean.wang@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@mediatek.com>
Signed-off-by: Mark-yw Chen <mark-yw.chen@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
---
v2: rebase and resend
v3: no change
---
 drivers/bluetooth/btmtksdio.c | 2 ++
 1 file changed, 2 insertions(+)
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Patch

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);