Merge "msm: kgsl: Make sure that pool pages don't have any extra references" (3db0b538) · Commits · e / devices / android_kernel_fairphone_FP4

drivers/gpu/msm/kgsl_pool.c

+10 −0

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0-only
		/*
		* Copyright (c) 2016-2021, The Linux Foundation. All rights reserved.
		* Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
		*/

		#include <asm/cacheflush.h>
		@@ -61,6 +62,15 @@ _kgsl_get_pool_from_order(unsigned int order)
		static void
		_kgsl_pool_add_page(struct kgsl_page_pool pool, struct page p)
		{
		/*
		* Sanity check to make sure we don't re-pool a page that
		* somebody else has a reference to.
		*/
		if (WARN_ON_ONCE(unlikely(page_count(p) > 1))) {
		__free_pages(p, pool->pool_order);
		return;
		}

		kgsl_zero_page(p, pool->pool_order);

		spin_lock(&pool->list_lock);