From: Sibi Sankar sibis@codeaurora.org
commit d6fbfdbc12745ce24bcd348dbf7e652353b3e59c upstream.
Fix IPCC (Inter-Processor Communication Controller) channel exhaustion by setting the channel private data to NULL on mbox shutdown.
Err Logs: remoteproc: MBA booted without debug policy, loading mpss remoteproc: glink-edge: failed to acquire IPC channel remoteproc: failed to probe subdevices for remoteproc: -16
Fixes: fa74a0257f45 ("mailbox: Add support for Qualcomm IPCC") Signed-off-by: Sibi Sankar sibis@codeaurora.org Cc: stable@vger.kernel.org Reviewed-by: Bjorn Andersson bjorn.andersson@linaro.org Reviewed-by: Manivannan Sadhasivam manivannan.sadhasivam@linaro.org Signed-off-by: Jassi Brar jaswinder.singh@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/mailbox/qcom-ipcc.c | 6 ++++++ 1 file changed, 6 insertions(+)
--- a/drivers/mailbox/qcom-ipcc.c +++ b/drivers/mailbox/qcom-ipcc.c @@ -155,6 +155,11 @@ static int qcom_ipcc_mbox_send_data(stru return 0; }
+static void qcom_ipcc_mbox_shutdown(struct mbox_chan *chan) +{ + chan->con_priv = NULL; +} + static struct mbox_chan *qcom_ipcc_mbox_xlate(struct mbox_controller *mbox, const struct of_phandle_args *ph) { @@ -184,6 +189,7 @@ static struct mbox_chan *qcom_ipcc_mbox_
static const struct mbox_chan_ops ipcc_mbox_chan_ops = { .send_data = qcom_ipcc_mbox_send_data, + .shutdown = qcom_ipcc_mbox_shutdown, };
static int qcom_ipcc_setup_mbox(struct qcom_ipcc *ipcc)