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From: Daniel Vetter <daniel.vetter@ffwll.ch>
To: DRI Development <dri-devel@lists.freedesktop.org>
Cc: Daniel Vetter <daniel.vetter@intel.com>,
	Daniel Vetter <daniel.vetter@ffwll.ch>,
	Intel Graphics Development <intel-gfx@lists.freedesktop.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subject: [PATCH 02/51] drm/i915: Don't clear drvdata in ->release
Date: Mon,  2 Mar 2020 23:25:42 +0100	[thread overview]
Message-ID: <20200302222631.3861340-3-daniel.vetter@ffwll.ch> (raw)
In-Reply-To: <20200302222631.3861340-1-daniel.vetter@ffwll.ch>

For two reasons:

- The driver core clears this already for us after we're unloaded in
  __device_release_driver().

- It's way too late, the drm_device ->release callback might massively
  outlive the underlying physical device, since a drm_device can't be
  kept alive by open drm_file or well really anything else userspace
  is still hanging onto. So if we clear this ourselves, we should
  clear it in the pci ->remove callback, not in the drm_device
  ->relase callback.

Looking at git history this was fixed in the driver core with

commit 0998d0631001288a5974afc0b2a5f568bcdecb4d
Author: Hans de Goede <hdegoede@redhat.com>
Date:   Wed May 23 00:09:34 2012 +0200

    device-core: Ensure drvdata = NULL when no driver is bound

v2: Cite the core fix in the commit message (Chris).

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
---
 drivers/gpu/drm/i915/i915_drv.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index e7c339255de5..5997b4507f29 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -914,9 +914,6 @@ static void i915_driver_destroy(struct drm_i915_private *i915)
 
 	drm_dev_fini(&i915->drm);
 	kfree(i915);
-
-	/* And make sure we never chase our dangling pointer from pci_dev */
-	pci_set_drvdata(pdev, NULL);
 }
 
 /**
-- 
2.24.1

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  parent reply	other threads:[~2020-03-02 22:26 UTC|newest]

Thread overview: 108+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-02 22:25 [PATCH 00/51] drm_device managed resources, v4 Daniel Vetter
2020-03-02 22:25 ` [PATCH 01/51] mm/sl[uo]b: export __kmalloc_track(_node)_caller Daniel Vetter
2020-03-02 22:25 ` Daniel Vetter [this message]
2020-03-02 22:25 ` [PATCH 03/51] drm: add managed resources tied to drm_device Daniel Vetter
2020-03-03  8:04   ` Dan Carpenter
2020-03-03  8:25     ` Daniel Vetter
2020-03-03  8:44   ` [PATCH] " Daniel Vetter
2020-03-06 19:38     ` Sam Ravnborg
2020-03-11  9:07   ` [PATCH 03/51] " Thomas Zimmermann
2020-03-11  9:47     ` Thomas Zimmermann
2020-03-16  8:45     ` Daniel Vetter
2020-03-11  9:14   ` Thomas Zimmermann
2020-03-16  8:50     ` Daniel Vetter
2020-03-02 22:25 ` [PATCH 04/51] drm: Set final_kfree in drm_dev_alloc Daniel Vetter
2020-03-03  7:44   ` Gerd Hoffmann
2020-03-07  8:06   ` Sam Ravnborg
2020-03-23 11:02     ` Daniel Vetter
2020-03-11  9:09   ` Thomas Zimmermann
2020-03-02 22:25 ` [PATCH 05/51] drm/mipi_dbi: Use drmm_add_final_kfree in all drivers Daniel Vetter
2020-03-02 22:25 ` [PATCH 06/51] drm/udl: Use drmm_add_final_kfree Daniel Vetter
2020-03-11  9:10   ` Thomas Zimmermann
2020-03-02 22:25 ` [PATCH 07/51] drm/qxl: " Daniel Vetter
2020-03-03  7:44   ` Gerd Hoffmann
2020-03-02 22:25 ` [PATCH 08/51] drm/i915: " Daniel Vetter
2020-03-02 22:25 ` [PATCH 09/51] drm/cirrus: " Daniel Vetter
2020-03-03  7:49   ` Gerd Hoffmann
2020-03-03  8:27     ` Daniel Vetter
2020-03-02 22:25 ` [PATCH 10/51] drm/v3d: " Daniel Vetter
2020-03-02 22:25 ` [PATCH 11/51] drm/tidss: " Daniel Vetter
2020-03-02 22:25 ` [PATCH 12/51] drm/mcde: " Daniel Vetter
2020-03-02 22:25 ` [PATCH 13/51] drm/vgem: " Daniel Vetter
2020-03-02 22:25 ` [PATCH 14/51] drm/vkms: " Daniel Vetter
2020-03-02 22:25 ` [PATCH 15/51] drm/repaper: " Daniel Vetter
2020-03-06 20:27   ` Sam Ravnborg
2020-03-02 22:25 ` [PATCH 16/51] drm/ingenic: " Daniel Vetter
2020-03-06 20:27   ` Sam Ravnborg
2020-03-02 22:25 ` [PATCH 17/51] drm/gm12u320: " Daniel Vetter
2020-03-06 20:27   ` Sam Ravnborg
2020-03-02 22:25 ` [PATCH 18/51] drm/<drivers>: " Daniel Vetter
2020-03-06 20:28   ` Sam Ravnborg
2020-03-02 22:25 ` [PATCH 19/51] drm: Cleanups after drmm_add_final_kfree rollout Daniel Vetter
2020-03-03  8:45   ` [PATCH] " Daniel Vetter
2020-03-06 20:31     ` Sam Ravnborg
2020-03-06 20:29   ` [PATCH 19/51] " Sam Ravnborg
2020-03-11  9:15   ` Thomas Zimmermann
2020-03-02 22:26 ` [PATCH 20/51] drm: Handle dev->unique with drmm_ Daniel Vetter
2020-03-06 20:37   ` Sam Ravnborg
2020-03-23 10:54     ` Daniel Vetter
2020-03-11  9:19   ` Thomas Zimmermann
2020-03-02 22:26 ` [PATCH 21/51] drm: Use drmm_ for drm_dev_init cleanup Daniel Vetter
2020-03-11  9:39   ` Thomas Zimmermann
2020-03-16  9:02     ` Daniel Vetter
2020-03-02 22:26 ` [PATCH 22/51] drm: manage drm_minor cleanup with drmm_ Daniel Vetter
2020-03-11  9:59   ` Thomas Zimmermann
2020-03-16  9:07     ` Daniel Vetter
2020-03-02 22:26 ` [PATCH 23/51] drm: Manage drm_gem_init " Daniel Vetter
2020-03-07  8:20   ` Sam Ravnborg
2020-03-02 22:26 ` [PATCH 24/51] drm: Manage drm_vblank_cleanup " Daniel Vetter
2020-03-07  8:28   ` Sam Ravnborg
2020-03-02 22:26 ` [PATCH 25/51] drm: Garbage collect drm_dev_fini Daniel Vetter
2020-03-07  8:30   ` Sam Ravnborg
2020-03-02 22:26 ` [PATCH 26/51] drm: Manage drm_mode_config_init with drmm_ Daniel Vetter
2020-03-06 20:04   ` Sam Ravnborg
2020-03-02 22:26 ` [PATCH 27/51] drm/bochs: Remove leftover drm_atomic_helper_shutdown Daniel Vetter
2020-03-03  7:49   ` Gerd Hoffmann
2020-03-02 22:26 ` [PATCH 28/51] drm/bochs: Drop explicit drm_mode_config_cleanup Daniel Vetter
2020-03-03  7:50   ` Gerd Hoffmann
2020-03-06 20:14   ` Sam Ravnborg
2020-03-02 22:26 ` [PATCH 29/51] drm/cirrus: Drop explicit drm_mode_config_cleanup call Daniel Vetter
2020-03-03  7:51   ` Gerd Hoffmann
2020-03-02 22:26 ` [PATCH 30/51] drm/cirrus: Fully embrace devm_ Daniel Vetter
2020-03-03  7:51   ` Gerd Hoffmann
2020-03-02 22:26 ` [PATCH 31/51] drm/ingenic: Drop explicit drm_mode_config_cleanup call Daniel Vetter
2020-03-06 20:17   ` Sam Ravnborg
2020-03-02 22:26 ` [PATCH 32/51] drm/mcde: " Daniel Vetter
2020-03-06 20:18   ` Sam Ravnborg
2020-03-02 22:26 ` [PATCH 33/51] drm/mcde: More devm_drm_dev_init Daniel Vetter
2020-03-02 22:26 ` [PATCH 34/51] drm/meson: Drop explicit drm_mode_config_cleanup call Daniel Vetter
2020-03-02 22:26 ` [PATCH 35/51] drm/pl111: " Daniel Vetter
2020-03-07  8:37   ` Sam Ravnborg
2020-03-02 22:26 ` [PATCH 36/51] drm/rcar-du: " Daniel Vetter
2020-03-02 22:26 ` [PATCH 37/51] drm/rockchip: " Daniel Vetter
2020-03-07  8:38   ` Sam Ravnborg
2020-03-02 22:26 ` [PATCH 38/51] drm/stm: " Daniel Vetter
2020-03-07  9:25   ` Sam Ravnborg
2020-03-02 22:26 ` [PATCH 39/51] drm/shmob: " Daniel Vetter
2020-03-02 22:26 ` [PATCH 40/51] drm/mtk: " Daniel Vetter
2020-03-07  9:26   ` Sam Ravnborg
2020-03-02 22:26 ` [PATCH 41/51] drm/tidss: " Daniel Vetter
2020-03-02 22:26 ` [PATCH 42/51] drm/gm12u320: More drmm_ Daniel Vetter
2020-03-02 22:26 ` [PATCH 43/51] drm/gm12u320: Use devm_drm_dev_init Daniel Vetter
2020-03-02 22:26 ` [PATCH 44/51] drm/gm12u320: Use helpers for shutdown/suspend/resume Daniel Vetter
2020-03-02 22:26 ` [PATCH 45/51] drm/gm12u320: Simplify upload work Daniel Vetter
2020-03-02 22:26 ` [PATCH 46/51] drm/repaper: Drop explicit drm_mode_config_cleanup call Daniel Vetter
2020-03-07  9:31   ` Sam Ravnborg
2020-03-02 22:26 ` [PATCH 47/51] drm/mipi-dbi: Move drm_mode_config_init into mipi library Daniel Vetter
2020-03-02 22:26 ` [PATCH 48/51] drm/mipi-dbi: Drop explicit drm_mode_config_cleanup call Daniel Vetter
2020-03-02 22:26 ` [PATCH 49/51] drm/udl: " Daniel Vetter
2020-03-02 22:26 ` [PATCH 50/51] drm/udl: drop drm_driver.release hook Daniel Vetter
2020-03-03  7:57   ` Thomas Zimmermann
2020-03-02 22:26 ` [PATCH 51/51] drm: Add docs for managed resources Daniel Vetter
2020-03-07 10:07   ` Sam Ravnborg
  -- strict thread matches above, loose matches on Subject: below --
2020-03-23 14:48 [PATCH 00/51] drm_device managed resources, v5 Daniel Vetter
2020-03-23 14:49 ` [PATCH 02/51] drm/i915: Don't clear drvdata in ->release Daniel Vetter
2020-02-27 18:14 [PATCH 00/51] drm managed resources, v3 Daniel Vetter
2020-02-27 18:14 ` [PATCH 02/51] drm/i915: Don't clear drvdata in ->release Daniel Vetter
2020-02-21 21:02 [PATCH 00/51] drm managed resources, v2 Daniel Vetter
2020-02-21 21:02 ` [PATCH 02/51] drm/i915: Don't clear drvdata in ->release Daniel Vetter
2020-02-21 21:36   ` Chris Wilson
2020-02-22  9:48     ` Daniel Vetter
2020-02-22  9:50       ` Daniel Vetter

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