From 5bf8a7481d21a669dd9dd874c00f7815a878111a Mon Sep 17 00:00:00 2001 From: Chin-Ran Lo Date: Mon, 14 Jul 2014 21:05:37 -0700 Subject: [PATCH] Bluetooth: btmrvl: avoid sending data to firmware after hs_activated We should suspend hci device and purge remaining data in tx queue before enabling host sleep in firmware. If any data is sent to firmware after host sleep is activated, firmware may end up sending a TX_DONE interrupt to driver. If this interrupt gets delivered to host while the SDIO host controller is suspending, it may crash the system. Conversely, in resume handler, we should resume hci device after host sleep is de-activated. Signed-off-by: Chin-Ran Lo Signed-off-by: Bing Zhao Signed-off-by: Marcel Holtmann --- drivers/bluetooth/btmrvl_sdio.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/bluetooth/btmrvl_sdio.c b/drivers/bluetooth/btmrvl_sdio.c index efff06438b02..3e683b153259 100644 --- a/drivers/bluetooth/btmrvl_sdio.c +++ b/drivers/bluetooth/btmrvl_sdio.c @@ -1169,6 +1169,10 @@ static int btmrvl_sdio_suspend(struct device *dev) } priv = card->priv; + hcidev = priv->btmrvl_dev.hcidev; + BT_DBG("%s: SDIO suspend", hcidev->name); + hci_suspend_dev(hcidev); + skb_queue_purge(&priv->adapter->tx_queue); if (priv->adapter->hs_state != HS_ACTIVATED) { if (btmrvl_enable_hs(priv)) { @@ -1176,10 +1180,6 @@ static int btmrvl_sdio_suspend(struct device *dev) return -EBUSY; } } - hcidev = priv->btmrvl_dev.hcidev; - BT_DBG("%s: SDIO suspend", hcidev->name); - hci_suspend_dev(hcidev); - skb_queue_purge(&priv->adapter->tx_queue); priv->adapter->is_suspended = true; @@ -1221,13 +1221,13 @@ static int btmrvl_sdio_resume(struct device *dev) return 0; } - priv->adapter->is_suspended = false; - hcidev = priv->btmrvl_dev.hcidev; - BT_DBG("%s: SDIO resume", hcidev->name); - hci_resume_dev(hcidev); priv->hw_wakeup_firmware(priv); priv->adapter->hs_state = HS_DEACTIVATED; + hcidev = priv->btmrvl_dev.hcidev; BT_DBG("%s: HS DEACTIVATED in resume!", hcidev->name); + priv->adapter->is_suspended = false; + BT_DBG("%s: SDIO resume", hcidev->name); + hci_resume_dev(hcidev); return 0; }