remoteproc: qcom_q6v5_mss: Reload the mba region on coredump

On secure devices after a wdog/fatal interrupt, the mba region has to be
refreshed in order to prevent the following errors during mba load.

Err Logs:
remoteproc remoteproc2: stopped remote processor 4080000.remoteproc
qcom-q6v5-mss 4080000.remoteproc: PBL returned unexpected status -284031232
qcom-q6v5-mss 4080000.remoteproc: PBL returned unexpected status -284031232
....
qcom-q6v5-mss 4080000.remoteproc: PBL returned unexpected status -284031232
qcom-q6v5-mss 4080000.remoteproc: MBA booted, loading mpss

Fixes: 7dd8ade24dc2a ("remoteproc: qcom: q6v5-mss: Add custom dump function for modem")
Cc: stable@vger.kernel.org
Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
Tested-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20200304194729.27979-4-sibis@codeaurora.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

diff --git a/drivers/remoteproc/qcom_q6v5_mss.c b/drivers/remoteproc/qcom_q6v5_mss.c
index b8a922181de8ac019054224597aea87af5e36d00..d7667418a62f4c2d3381f96938bcc1cad267efc3 100644 (file)
--- a/drivers/remoteproc/qcom_q6v5_mss.c
+++ b/drivers/remoteproc/qcom_q6v5_mss.c
@@ -1042,6 +1042,23 @@ static void q6v5_mba_reclaim(struct q6v5 *qproc)
        }
 }
 
+static int q6v5_reload_mba(struct rproc *rproc)
+{
+       struct q6v5 *qproc = rproc->priv;
+       const struct firmware *fw;
+       int ret;
+
+       ret = request_firmware(&fw, rproc->firmware, qproc->dev);
+       if (ret < 0)
+               return ret;
+
+       q6v5_load(rproc, fw);
+       ret = q6v5_mba_load(qproc);
+       release_firmware(fw);
+
+       return ret;
+}
+
 static int q6v5_mpss_load(struct q6v5 *qproc)
 {
        const struct elf32_phdr *phdrs;
@@ -1221,7 +1238,7 @@ static void qcom_q6v5_dump_segment(struct rproc *rproc,
 
        /* Unlock mba before copying segments */
        if (!qproc->dump_mba_loaded) {
-               ret = q6v5_mba_load(qproc);
+               ret = q6v5_reload_mba(rproc);
                if (!ret) {
                        /* Reset ownership back to Linux to copy segments */
                        ret = q6v5_xfer_mem_ownership(qproc, &qproc->mpss_perm,