From: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
Date: Wed, 9 Oct 2019 14:41:22 +0000 (+0100)
Subject: misc: fastrpc: handle interrupted contexts
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=387f625585d1a59e5dc7fbd6bd4002360cad78b0;p=linux.git

misc: fastrpc: handle interrupted contexts

Buffers owned by a context that has been interrupted either by a
signal or a timeout might still be being accessed by the DSP.

delegate returning the associated memory to a later time when the
device is released.

Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20191009144123.24583-5-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c
index 666c431380ce8..eef2cdc00672a 100644
--- a/drivers/misc/fastrpc.c
+++ b/drivers/misc/fastrpc.c
@@ -984,12 +984,13 @@ static int fastrpc_internal_invoke(struct fastrpc_user *fl,  u32 kernel,
 	}
 
 bail:
-	/* We are done with this compute context, remove it from pending list */
-	spin_lock(&fl->lock);
-	list_del(&ctx->node);
-	spin_unlock(&fl->lock);
-	fastrpc_context_put(ctx);
-
+	if (err != -ERESTARTSYS && err != -ETIMEDOUT) {
+		/* We are done with this compute context */
+		spin_lock(&fl->lock);
+		list_del(&ctx->node);
+		spin_unlock(&fl->lock);
+		fastrpc_context_put(ctx);
+	}
 	if (err)
 		dev_dbg(fl->sctx->dev, "Error: Invoke Failed %d\n", err);