From: Loic Pallardy <loic.pallardy@st.com>
Date: Fri, 27 Jul 2018 13:14:36 +0000 (+0200)
Subject: remoteproc: configure IOMMU only if device address requested
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=3bc8140b157c973f3746cc72d31b3fe0fa7a4117;p=linux.git

remoteproc: configure IOMMU only if device address requested

If there is no IOMMU associate to remote processor device,
remoteproc_core won't be able to satisfy device address requested
in firmware resource table.
Return an error as configuration won't be coherent.

Signed-off-by: Loic Pallardy <loic.pallardy@st.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index aa6206706fe33..8ca752cbcfe92 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -657,7 +657,15 @@ static int rproc_handle_carveout(struct rproc *rproc,
 	 * to use the iommu-based DMA API: we expect 'dma' to contain the
 	 * physical address in this case.
 	 */
-	if (rproc->domain) {
+
+	if (rsc->da != FW_RSC_ADDR_ANY && !rproc->domain) {
+		dev_err(dev->parent,
+			"Bad carveout rsc configuration\n");
+		ret = -ENOMEM;
+		goto dma_free;
+	}
+
+	if (rsc->da != FW_RSC_ADDR_ANY && rproc->domain) {
 		mapping = kzalloc(sizeof(*mapping), GFP_KERNEL);
 		if (!mapping) {
 			ret = -ENOMEM;