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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>
This commit is contained in:
Jorge Ramirez-Ortiz 2019-10-09 15:41:22 +01:00 committed by Greg Kroah-Hartman
parent 55bcda3558
commit 387f625585
1 changed files with 7 additions and 6 deletions
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13
drivers/misc/fastrpc.c
View File

@ -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);