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Commit 4930cb1c authored by Lynus Vaz's avatar Lynus Vaz
Browse files

msm: kgsl: Use a lock when updating the sparse bindings 



Use the appropriate lock when adding sparse bindings, to protect the
list of sparse bindings from concurrent updates by multiple threads.

Change-Id: Ice9750c96fca42f4049ed352533f4722b5166221
Signed-off-by: default avatarLynus Vaz <lvaz@codeaurora.org>
parent e8c82574

drivers/gpu/msm/kgsl.c

+4 −0
Original line number Diff line number Diff line
@@ -3461,6 +3461,7 @@ long kgsl_ioctl_sparse_virt_free(struct kgsl_device_private *dev_priv, 
	return 0;

}



/* entry->bind_lock must be held by the caller */

static int _sparse_add_to_bind_tree(struct kgsl_mem_entry *entry,

		uint64_t v_offset,

		struct kgsl_memdesc *memdesc,
@@ -3719,8 +3720,11 @@ static int _sparse_bind(struct kgsl_process_private *process, 
		return ret;

	}



	spin_lock(&virt_entry->bind_lock);

	ret = _sparse_add_to_bind_tree(virt_entry, v_offset, memdesc,

			p_offset, size, flags);

	spin_unlock(&virt_entry->bind_lock);



	if (ret == 0)

		memdesc->cur_bindings += size / PAGE_SIZE;