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61 lines
2.1 KiB
Diff
61 lines
2.1 KiB
Diff
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From 888d867aa6f8fe384b37c0915eed07bb3a970fc4 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org>
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Date: Thu, 1 Jul 2021 19:07:47 +0200
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Subject: [PATCH] drm/gud: Free buffers on device removal
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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[ drm-misc commit f8ac863b6a93863334cefb94285daaa6617381b5 ]
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Free transfer and compression buffers on device removal instead of at
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DRM device removal time. This ensures that the usual 2x8MB buffers are
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released when the device is unplugged and not kept around should
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userspace keep the DRM device fd open.
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At least Ubuntu 20.04 doesn't release the DRM device on unplug.
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The damage_lock mutex is not destroyed because it is used outside the
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drm_dev_enter/exit block in gud_pipe_update(). AFAICT it's possible for
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an open fbdev descriptor to trigger a commit after the USB device is gone.
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v2: Don't destroy damage_lock
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Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
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Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
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Link: https://patchwork.freedesktop.org/patch/msgid/20210701170748.58009-1-noralf@tronnes.org
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---
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drivers/gpu/drm/gud/gud_drv.c | 9 +++++----
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1 file changed, 5 insertions(+), 4 deletions(-)
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--- a/drivers/gpu/drm/gud/gud_drv.c
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+++ b/drivers/gpu/drm/gud/gud_drv.c
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@@ -407,14 +407,15 @@ static struct drm_driver gud_drm_driver
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.minor = 0,
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};
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-static void gud_free_buffers_and_mutex(struct drm_device *drm, void *unused)
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+static void gud_free_buffers_and_mutex(void *data)
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{
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- struct gud_device *gdrm = to_gud_device(drm);
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+ struct gud_device *gdrm = data;
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vfree(gdrm->compress_buf);
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+ gdrm->compress_buf = NULL;
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kfree(gdrm->bulk_buf);
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+ gdrm->bulk_buf = NULL;
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mutex_destroy(&gdrm->ctrl_lock);
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- mutex_destroy(&gdrm->damage_lock);
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}
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static int gud_probe(struct usb_interface *intf, const struct usb_device_id *id)
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@@ -468,7 +469,7 @@ static int gud_probe(struct usb_interfac
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INIT_WORK(&gdrm->work, gud_flush_work);
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gud_clear_damage(gdrm);
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- ret = drmm_add_action_or_reset(drm, gud_free_buffers_and_mutex, NULL);
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+ ret = devm_add_action(dev, gud_free_buffers_and_mutex, gdrm);
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if (ret)
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return ret;
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