author: Jens Wiklander <jens.wiklander@linaro.org> 2019-11-07 11:42:56 +0100
committer: Jens Wiklander <jens.wiklander@linaro.org> 2020-02-28 13:37:42 +0100
commit: f1bbacedb0af640a93e47799203e556be2825da3
parent: c180f9bbe29a403459dd76422f435382aec6adaa
Commit Summary:
Diffstat:
2 files changed, 20 insertions, 14 deletions
diff --git a/drivers/tee/tee_private.h b/drivers/tee/tee_private.h
index f797171f0434..e55204df31ce 100644
--- a/drivers/tee/tee_private.h
+++ b/drivers/tee/tee_private.h
@@ -37,7 +37,8 @@ struct tee_shm_pool {
* @num_users: number of active users of this device
* @c_no_user: completion used when unregistering the device
* @mutex: mutex protecting @num_users and @idr
- * @idr: register of shared memory object allocated on this device
+ * @idr: register of user space shared memory objects allocated or
+ * registered on this device
* @pool: shared memory pool
*/
struct tee_device {
diff --git a/drivers/tee/tee_shm.c b/drivers/tee/tee_shm.c
index b666854c2491..02210f179ae3 100644
--- a/drivers/tee/tee_shm.c
+++ b/drivers/tee/tee_shm.c
@@ -15,9 +15,11 @@ static void tee_shm_release(struct tee_shm *shm)
{
struct tee_device *teedev = shm->teedev;
- mutex_lock(&teedev->mutex);
- idr_remove(&teedev->idr, shm->id);
- mutex_unlock(&teedev->mutex);
+ if (shm->flags & TEE_SHM_DMA_BUF) {
+ mutex_lock(&teedev->mutex);
+ idr_remove(&teedev->idr, shm->id);
+ mutex_unlock(&teedev->mutex);
+ }
if (shm->flags & TEE_SHM_POOL) {
struct tee_shm_pool_mgr *poolm;
@@ -137,17 +139,18 @@ struct tee_shm *tee_shm_alloc(struct tee_context *ctx, size_t size, u32 flags)
goto err_kfree;
}
- mutex_lock(&teedev->mutex);
- shm->id = idr_alloc(&teedev->idr, shm, 1, 0, GFP_KERNEL);
- mutex_unlock(&teedev->mutex);
- if (shm->id < 0) {
- ret = ERR_PTR(shm->id);
- goto err_pool_free;
- }
if (flags & TEE_SHM_DMA_BUF) {
DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
+ mutex_lock(&teedev->mutex);
+ shm->id = idr_alloc(&teedev->idr, shm, 1, 0, GFP_KERNEL);
+ mutex_unlock(&teedev->mutex);
+ if (shm->id < 0) {
+ ret = ERR_PTR(shm->id);
+ goto err_pool_free;
+ }
+
exp_info.ops = &tee_shm_dma_buf_ops;
exp_info.size = shm->size;
exp_info.flags = O_RDWR;
@@ -165,9 +168,11 @@ struct tee_shm *tee_shm_alloc(struct tee_context *ctx, size_t size, u32 flags)
return shm;
err_rem:
- mutex_lock(&teedev->mutex);
- idr_remove(&teedev->idr, shm->id);
- mutex_unlock(&teedev->mutex);
+ if (flags & TEE_SHM_DMA_BUF) {
+ mutex_lock(&teedev->mutex);
+ idr_remove(&teedev->idr, shm->id);
+ mutex_unlock(&teedev->mutex);
+ }
err_pool_free:
poolm->ops->free(poolm, shm);
err_kfree: