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gpu: host1x: Check whether size of unpin isn't 0

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[ Upstream commit ec58923215 ]

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>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dmitry Osipenko 2018-07-06 21:02:36 +03:00 committed by Greg Kroah-Hartman
parent 1b57c5876c
commit d3f205d2d3
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/host1x/job.c
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@ -686,7 +686,8 @@ 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,