In many platforms Bluetooth chip wcn3990 is a discrete chip connected via UART lines to app processor. if the chip goes into bad state i.e. into hard fault exception routine, which will not further respond to any commands from HOST via UART. In that case wcn3390 will intimate HOST by generating hardware error. Host stack will initiate a close and reopen of the hci driver. Prior to sending hard ware error, wcn3990 has a capability of sending the RAM dump i.e. memory dump of the BT chip. this will help us to fix stability issues of the SoC. We at QCA driver read the dump packets and store via devcoredump(). We perform restart after collecting the ram dump of the SoC. Harish Bandi (1): Bluetooth: hci_qca: Sub system restart support for WCN3990 drivers/bluetooth/btqca.h | 8 ++ drivers/bluetooth/hci_qca.c | 261 ++++++++++++++++++++++++++++++++++++ 2 files changed, 269 insertions(+) -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
