1 files changed, 28 insertions, 34 deletions

diff --git a/drivers/tee/optee/core.c b/drivers/tee/optee/core.c
index 2a258bd3b6b5..3aed554bc8d8 100644
--- a/drivers/tee/optee/core.c
+++ b/drivers/tee/optee/core.c
@@ -15,7 +15,6 @@
 #include <linux/string.h>
 #include <linux/tee_drv.h>
 #include <linux/types.h>
-#include <linux/workqueue.h>
 #include "optee_private.h"
 
 int optee_pool_op_alloc_helper(struct tee_shm_pool *pool, struct tee_shm *shm,
@@ -26,46 +25,46 @@ int optee_pool_op_alloc_helper(struct tee_shm_pool *pool, struct tee_shm *shm,
 						   size_t num_pages,
 						   unsigned long start))
 {
-	unsigned int order = get_order(size);
-	struct page *page;
+	size_t nr_pages = roundup(size, PAGE_SIZE) / PAGE_SIZE;
+	struct page **pages;
+	unsigned int i;
 	int rc = 0;
 
 	/*
 	 * Ignore alignment since this is already going to be page aligned
 	 * and there's no need for any larger alignment.
 	 */
-	page = alloc_pages(GFP_KERNEL | __GFP_ZERO, order);
-	if (!page)
+	shm->kaddr = alloc_pages_exact(nr_pages * PAGE_SIZE,
+				       GFP_KERNEL | __GFP_ZERO);
+	if (!shm->kaddr)
 		return -ENOMEM;
 
-	shm->kaddr = page_address(page);
-	shm->paddr = page_to_phys(page);
-	shm->size = PAGE_SIZE << order;
+	shm->paddr = virt_to_phys(shm->kaddr);
+	shm->size = nr_pages * PAGE_SIZE;
 
-	if (shm_register) {
-		unsigned int nr_pages = 1 << order, i;
-		struct page **pages;
+	pages = kcalloc(nr_pages, sizeof(*pages), GFP_KERNEL);
+	if (!pages) {
+		rc = -ENOMEM;
+		goto err;
+	}
 
-		pages = kcalloc(nr_pages, sizeof(*pages), GFP_KERNEL);
-		if (!pages) {
-			rc = -ENOMEM;
-			goto err;
-		}
+	for (i = 0; i < nr_pages; i++)
+		pages[i] = virt_to_page((u8 *)shm->kaddr + i * PAGE_SIZE);
 
-		for (i = 0; i < nr_pages; i++)
-			pages[i] = page + i;
+	shm->pages = pages;
+	shm->num_pages = nr_pages;
 
+	if (shm_register) {
 		rc = shm_register(shm->ctx, shm, pages, nr_pages,
 				  (unsigned long)shm->kaddr);
-		kfree(pages);
 		if (rc)
 			goto err;
 	}
 
 	return 0;
-
 err:
-	free_pages((unsigned long)shm->kaddr, order);
+	free_pages_exact(shm->kaddr, shm->size);
+	shm->kaddr = NULL;
 	return rc;
 }
 
@@ -75,8 +74,10 @@ void optee_pool_op_free_helper(struct tee_shm_pool *pool, struct tee_shm *shm,
 {
 	if (shm_unregister)
 		shm_unregister(shm->ctx, shm);
-	free_pages((unsigned long)shm->kaddr, get_order(shm->size));
+	free_pages_exact(shm->kaddr, shm->size);
 	shm->kaddr = NULL;
+	kfree(shm->pages);
+	shm->pages = NULL;
 }
 
 static void optee_bus_scan(struct work_struct *work)
@@ -110,12 +111,7 @@ int optee_open(struct tee_context *ctx, bool cap_memref_null)
 
 		if (!optee->scan_bus_done) {
 			INIT_WORK(&optee->scan_bus_work, optee_bus_scan);
-			optee->scan_bus_wq = create_workqueue("optee_bus_scan");
-			if (!optee->scan_bus_wq) {
-				kfree(ctxdata);
-				return -ECHILD;
-			}
-			queue_work(optee->scan_bus_wq, &optee->scan_bus_work);
+			schedule_work(&optee->scan_bus_work);
 			optee->scan_bus_done = true;
 		}
 	}
@@ -129,7 +125,8 @@ int optee_open(struct tee_context *ctx, bool cap_memref_null)
 
 static void optee_release_helper(struct tee_context *ctx,
 				 int (*close_session)(struct tee_context *ctx,
-						      u32 session))
+						      u32 session,
+						      bool system_thread))
 {
 	struct optee_context_data *ctxdata = ctx->data;
 	struct optee_session *sess;
@@ -141,7 +138,7 @@ static void optee_release_helper(struct tee_context *ctx,
 	list_for_each_entry_safe(sess, sess_tmp, &ctxdata->sess_list,
 				 list_node) {
 		list_del(&sess->list_node);
-		close_session(ctx, sess->session_id);
+		close_session(ctx, sess->session_id, sess->use_sys_thread);
 		kfree(sess);
 	}
 	kfree(ctxdata);
@@ -158,10 +155,7 @@ void optee_release_supp(struct tee_context *ctx)
 	struct optee *optee = tee_get_drvdata(ctx->teedev);
 
 	optee_release_helper(ctx, optee_close_session_helper);
-	if (optee->scan_bus_wq) {
-		destroy_workqueue(optee->scan_bus_wq);
-		optee->scan_bus_wq = NULL;
-	}
+
 	optee_supp_release(&optee->supp);
 }