On Wed, Jun 16, 2021 at 11:12:58PM +0530, Sibi Sankar wrote:

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

Reviewed-by: Manivannan Sadhasivam manivannan.sadhasivam@linaro.org

Thanks, Mani

Cc: stable@vger.kernel.org

drivers/mailbox/qcom-ipcc.c | 6 ++++++ 1 file changed, 6 insertions(+)

diff --git a/drivers/mailbox/qcom-ipcc.c b/drivers/mailbox/qcom-ipcc.c index 2d13c72944c6..584700cd1585 100644 --- a/drivers/mailbox/qcom-ipcc.c +++ b/drivers/mailbox/qcom-ipcc.c @@ -155,6 +155,11 @@ static int qcom_ipcc_mbox_send_data(struct mbox_chan *chan, void *data) 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_xlate(struct mbox_controller *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) -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project