From ec58923215dbbeef59ee82923ee94d745f73db58 Mon Sep 17 00:00:00 2001
From: Dmitry Osipenko <digetx@gmail.com>
Date: Fri, 6 Jul 2018 21:02:36 +0300
Subject: [PATCH] gpu: host1x: Check whether size of unpin isn't 0
Git-commit: ec58923215dbbeef59ee82923ee94d745f73db58
Patch-mainline: v4.18-rc6
References: bsc#1051510
Only gather pins are mapped by the Host1x driver, regular BO relocations
are not. Check whether size of unpin isn't 0, otherwise IOVA allocation at
0x0 could be erroneously released.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/gpu/host1x/job.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/host1x/job.c b/drivers/gpu/host1x/job.c
index e2f4a4d93d20..527a1cddb14f 100644
--- a/drivers/gpu/host1x/job.c
+++ b/drivers/gpu/host1x/job.c
@@ -569,7 +569,8 @@ void host1x_job_unpin(struct host1x_job *job)
for (i = 0; i < job->num_unpins; i++) {
struct host1x_job_unpin_data *unpin = &job->unpins[i];
- if (!IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL) && host->domain) {
+ if (!IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL) &&
+ unpin->size && host->domain) {
iommu_unmap(host->domain, job->addr_phys[i],
unpin->size);
free_iova(&host->iova,
--
2.18.0