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A mirror of the official Linux kernel repository just in case
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Thomas Zimmermann c537fb4e3d drm/qxl: Pin buffer objects for internal mappings 
Add qxl_bo_pin_and_vmap() that pins and vmaps a buffer object in one
step. Update callers of the regular qxl_bo_vmap(). Fixes a bug where
qxl accesses an unpinned buffer object while it is being moved; such
as with the monitor-description BO. An typical error is shown below.

[    4.303586] [drm:drm_atomic_helper_commit_planes] *ERROR* head 1 wrong: 65376256x16777216+0+0
[    4.586883] [drm:drm_atomic_helper_commit_planes] *ERROR* head 1 wrong: 65376256x16777216+0+0
[    4.904036] [drm:drm_atomic_helper_commit_planes] *ERROR* head 1 wrong: 65335296x16777216+0+0
[    5.374347] [drm:qxl_release_from_id_locked] *ERROR* failed to find id in release_idr

Commit b33651a5c9 ("drm/qxl: Do not pin buffer objects for vmap")
removed the implicit pin operation from qxl's vmap code. This is the
correct behavior for GEM and PRIME interfaces, but the pin is still
needed for qxl internal operation.

Also add a corresponding function qxl_bo_vunmap_and_unpin() and remove
the old qxl_bo_vmap() helpers.

Future directions: BOs should not be pinned or vmapped unnecessarily.
The pin-and-vmap operation should be removed from the driver and a
temporary mapping should be established with a vmap_local-like helper.
See the client helper drm_client_buffer_vmap_local() for semantics.

v2:
- unreserve BO on errors in qxl_bo_pin_and_vmap() (Dmitry)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Fixes: b33651a5c9 ("drm/qxl: Do not pin buffer objects for vmap")
Reported-by: David Kaplan <david.kaplan@amd.com>
Closes: https://lore.kernel.org/dri-devel/ab0fb17d-0f96-4ee6-8b21-65d02bb02655@suse.de/
Tested-by: David Kaplan <david.kaplan@amd.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Zack Rusin <zack.rusin@broadcom.com>
Cc: Dave Airlie <airlied@redhat.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: virtualization@lists.linux.dev
Cc: spice-devel@lists.freedesktop.org
Reviewed-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Reviewed-by: Zack Rusin <zack.rusin@broadcom.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240708142208.194361-1-tzimmermann@suse.de
2024-07-10 09:12:42 +02:00
arch 16 hotfixes, 11 of which are cc:stable. 2024-05-25 15:10:33 -07:00
block block-6.10-20240523 2024-05-23 13:44:47 -07:00
certs
crypto This push fixes a bug in the new ecc P521 code as well as a buggy 2024-05-20 08:47:54 -07:00
Documentation dt-bindings: display: add STM32 LVDS device 2024-06-28 11:17:05 +02:00
drivers drm/qxl: Pin buffer objects for internal mappings 2024-07-10 09:12:42 +02:00
fs four smb client fixes, including two important netfs integration fixes 2024-05-25 22:33:10 -07:00
include drm/display/dsc: Add a helper to dump the DSC configuration 2024-07-03 18:05:12 +03:00
init Driver core changes for 6.10-rc1 2024-05-22 12:13:40 -07:00
io_uring io_uring-6.10-20240523 2024-05-23 13:41:49 -07:00
ipc Mainly singleton patches, documented in their respective changelogs. 2024-05-19 14:02:03 -07:00
kernel Misc fixes: 2024-05-25 14:48:40 -07:00
lib lib/fonts: Fix visiblity of SUN12x22 and TER16x32 if DRM_PANIC 2024-06-24 13:18:02 +02:00
LICENSES
mm 16 hotfixes, 11 of which are cc:stable. 2024-05-25 15:10:33 -07:00
net NFS client updates for Linux 6.10 2024-05-23 13:51:09 -07:00
rust LoongArch changes for v6.10 2024-05-22 09:43:07 -07:00
samples tracing/treewide: Remove second parameter of __assign_str() 2024-05-22 20:14:47 -04:00
scripts - A series ("kbuild: enable more warnings by default") from Arnd 2024-05-22 18:59:29 -07:00
security hardening fixes for v6.10-rc1 2024-05-24 08:33:44 -07:00
sound sound fixes for 6.10-rc1 2024-05-24 08:48:51 -07:00
tools Revert a patch causing a regression as described in the cset: 2024-05-26 09:54:26 -07:00
usr
virt The usual shower of singleton fixes and minor series all over MM, 2024-05-19 09:21:03 -07:00
.clang-format
.cocciconfig
.editorconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap mailmap: update email address for Satya Priya 2024-05-24 11:55:05 -07:00
.rustfmt.toml
COPYING
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Kconfig
MAINTAINERS dt-bindings: display: add STM32 LVDS device 2024-06-28 11:17:05 +02:00
Makefile Linux 6.10-rc1 2024-05-26 15:20:12 -07:00
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.