linux-kernel - [PATCH 4.19 07/45] drm/vmwgfx: Return 0 when gmrid::get

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Message-Id: <20190326042703.059597782@linuxfoundation.org>
Date:   Tue, 26 Mar 2019 15:29:50 +0900
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Deepak Rawat <drawat@...are.com>,
        Thomas Hellstrom <thellstrom@...are.com>
Subject: [PATCH 4.19 07/45] drm/vmwgfx: Return 0 when gmrid::get_node runs out of IDs

4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Deepak Rawat <drawat@...are.com>

commit 4b9ce3a651a37c60527101db4451a315a8b9588f upstream.

If it's not a system error and get_node implementation accommodate the
buffer object then it should return 0 with memm::mm_node set to NULL.

v2: Test for id != -ENOMEM instead of id == -ENOSPC.

Cc: <stable@...r.kernel.org>
Fixes: 4eb085e42fde ("drm/vmwgfx: Convert to new IDA API")
Signed-off-by: Deepak Rawat <drawat@...are.com>
Reviewed-by: Thomas Hellstrom <thellstrom@...are.com>
Signed-off-by: Thomas Hellstrom <thellstrom@...are.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c
@@ -57,7 +57,7 @@ static int vmw_gmrid_man_get_node(struct
 
 	id = ida_alloc_max(&gman->gmr_ida, gman->max_gmr_ids - 1, GFP_KERNEL);
 	if (id < 0)
-		return id;
+		return (id != -ENOMEM ? 0 : id);
 
 	spin_lock(&gman->lock);