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path: root/drivers/firmware/imx
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Diffstat (limited to 'drivers/firmware/imx')
-rw-r--r--drivers/firmware/imx/imx-scu.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/firmware/imx/imx-scu.c b/drivers/firmware/imx/imx-scu.c
index 04a24a863d6e..869be7a5172c 100644
--- a/drivers/firmware/imx/imx-scu.c
+++ b/drivers/firmware/imx/imx-scu.c
@@ -107,6 +107,12 @@ static void imx_scu_rx_callback(struct mbox_client *c, void *msg)
struct imx_sc_rpc_msg *hdr;
u32 *data = msg;
+ if (!sc_ipc->msg) {
+ dev_warn(sc_ipc->dev, "unexpected rx idx %d 0x%08x, ignore!\n",
+ sc_chan->idx, *data);
+ return;
+ }
+
if (sc_chan->idx == 0) {
hdr = msg;
sc_ipc->rx_size = hdr->size;
@@ -165,7 +171,8 @@ int imx_scu_call_rpc(struct imx_sc_ipc *sc_ipc, void *msg, bool have_resp)
mutex_lock(&sc_ipc->lock);
reinit_completion(&sc_ipc->done);
- sc_ipc->msg = msg;
+ if (have_resp)
+ sc_ipc->msg = msg;
sc_ipc->count = 0;
ret = imx_scu_ipc_write(sc_ipc, msg);
if (ret < 0) {
@@ -187,6 +194,7 @@ int imx_scu_call_rpc(struct imx_sc_ipc *sc_ipc, void *msg, bool have_resp)
}
out:
+ sc_ipc->msg = NULL;
mutex_unlock(&sc_ipc->lock);
dev_dbg(sc_ipc->dev, "RPC SVC done\n");