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From: Ekansh Gupta <quic_ekangupt@quicinc.com>
To: <srinivas.kandagatla@linaro.org>, <linux-arm-msm@vger.kernel.org>
CC: <gregkh@linuxfoundation.org>, <linux-kernel@vger.kernel.org>
Subject: [PATCH v1 12/16] misc: fastrpc: Add support for users to clean up DSP user PD
Date: Fri, 2 Feb 2024 12:10:35 +0530
Message-ID: <20240202064039.15505-13-quic_ekangupt@quicinc.com>
In-Reply-To: <20240202064039.15505-1-quic_ekangupt@quicinc.com>
References: <20240202064039.15505-1-quic_ekangupt@quicinc.com>
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Add a control mechanism for users to clean up DSP user PD. This
method can be used by users for handling any unexpected hang
scenarios on DSP PD. User can clean up DSP PD and restart the
user PD again.

Signed-off-by: Ekansh Gupta <quic_ekangupt@quicinc.com>
---
 drivers/misc/fastrpc.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c
index d4a4ad54a5c9..d1be89f84214 100644
--- a/drivers/misc/fastrpc.c
+++ b/drivers/misc/fastrpc.c
@@ -2360,6 +2360,11 @@ static int fastrpc_internal_control(struct fastrpc_user *fl,
 	case FASTRPC_CONTROL_RPC_POLL:
 		err = fastrpc_manage_poll_mode(fl, cp->lp.enable, cp->lp.latency);
 		break;
+	case FASTRPC_CONTROL_DSPPROCESS_CLEAN:
+		err = fastrpc_release_current_dsp_process(fl);
+		if (!err)
+			fastrpc_queue_pd_status(fl, fl->cctx->domain_id, FASTRPC_USERPD_FORCE_KILL);
+		break;
 	default:
 		err = -EBADRQC;
 		break;
-- 
2.17.0