Re: [PATCH] drm/qxl: properly handle device init failures

[Tong Zhang <ztong0001@xxxxxxxxx>]

Does this patch fix an issue raised previously? Or should they be used together?

https://www.mail-archive.com/linux-kernel@xxxxxxxxxxxxxxx/msg2466541.html 

IMHO using this patch alone won’t fix the issue --

Best,

- Tong

On Feb 8, 2021, at 5:41 AM, Gerd Hoffmann <kraxel@xxxxxxxxxx> wrote:

Specifically do not try release resources which where
not allocated in the first place.

Cc: Tong Zhang <ztong0001@xxxxxxxxx>
Signed-off-by: Gerd Hoffmann <kraxel@xxxxxxxxxx>
---
drivers/gpu/drm/qxl/qxl_display.c | 3 +++
drivers/gpu/drm/qxl/qxl_kms.c     | 4 ++++
2 files changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/qxl/qxl_display.c b/drivers/gpu/drm/qxl/qxl_display.c
index c326412136c5..ec50d2cfd4e1 100644
--- a/drivers/gpu/drm/qxl/qxl_display.c
+++ b/drivers/gpu/drm/qxl/qxl_display.c
@@ -1183,6 +1183,9 @@ int qxl_destroy_monitors_object(struct qxl_device *qdev)
{
int ret;

+ if (!qdev->monitors_config_bo)
+ return 0;
+
qdev->monitors_config = NULL;
qdev->ram_header->monitors_config = 0;

diff --git a/drivers/gpu/drm/qxl/qxl_kms.c b/drivers/gpu/drm/qxl/qxl_kms.c
index 66d74aaaee06..4dc5ad13f12c 100644
--- a/drivers/gpu/drm/qxl/qxl_kms.c
+++ b/drivers/gpu/drm/qxl/qxl_kms.c
@@ -288,6 +288,10 @@ void qxl_device_fini(struct qxl_device *qdev)
{
int cur_idx;

+ /* check if qxl_device_init() was successful (gc_work is initialized last) */
+ if (!qdev->gc_work.func)
+ return;
+
for (cur_idx = 0; cur_idx < 3; cur_idx++) {
if (!qdev->current_release_bo[cur_idx])
continue;
--
2.29.2

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