From: Lyude Paul <lyude@redhat.com>
To: dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org,
nouveau@lists.freedesktop.org, amd-gfx@lists.freedesktop.org,
"Ville Syrjälä" <ville.syrjala@linux.intel.com>,
"Jani Nikula" <jani.nikula@linux.intel.com>,
"Rodrigo Vivi" <rodrigo.vivi@intel.com>,
"Thomas Zimmermann" <tzimmermann@suse.de>,
"Thierry Reding" <thierry.reding@gmail.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <mripard@kernel.org>,
David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
linux-kernel@vger.kernel.org (open list)
Subject: [PATCH v3 17/20] drm/print: Handle potentially NULL drm_devices in drm_dbg_*
Date: Mon, 19 Apr 2021 18:55:19 -0400 [thread overview]
Message-ID: <20210419225523.184856-18-lyude@redhat.com> (raw)
In-Reply-To: <20210419225523.184856-1-lyude@redhat.com>
While this shouldn't really be something that happens all that often, since
we're going to be using the drm_dbg_* log helpers in DRM helpers it's
technically possible that a driver could use an AUX adapter before it's
been associated with it's respective drm_device. While drivers should take
care to avoid this, there's likely going to be situations where it's
difficult to workaround. And since other logging helpers in the kernel tend
to be OK with NULL pointers (for instance, passing a NULL pointer to a "%s"
argument for a printk-like function in the kernel doesn't break anything),
we should do the same for ours.
Signed-off-by: Lyude Paul <lyude@redhat.com>
---
include/drm/drm_print.h | 20 ++++++++++----------
1 file changed, 10 insertions(+), 10 deletions(-)
diff --git a/include/drm/drm_print.h b/include/drm/drm_print.h
index a3c58c941bdc..9b66be54dd16 100644
--- a/include/drm/drm_print.h
+++ b/include/drm/drm_print.h
@@ -443,25 +443,25 @@ void drm_dev_dbg(const struct device *dev, enum drm_debug_category category,
#define drm_dbg_core(drm, fmt, ...) \
- drm_dev_dbg((drm)->dev, DRM_UT_CORE, fmt, ##__VA_ARGS__)
+ drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_CORE, fmt, ##__VA_ARGS__)
#define drm_dbg(drm, fmt, ...) \
- drm_dev_dbg((drm)->dev, DRM_UT_DRIVER, fmt, ##__VA_ARGS__)
+ drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_DRIVER, fmt, ##__VA_ARGS__)
#define drm_dbg_kms(drm, fmt, ...) \
- drm_dev_dbg((drm)->dev, DRM_UT_KMS, fmt, ##__VA_ARGS__)
+ drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_KMS, fmt, ##__VA_ARGS__)
#define drm_dbg_prime(drm, fmt, ...) \
- drm_dev_dbg((drm)->dev, DRM_UT_PRIME, fmt, ##__VA_ARGS__)
+ drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_PRIME, fmt, ##__VA_ARGS__)
#define drm_dbg_atomic(drm, fmt, ...) \
- drm_dev_dbg((drm)->dev, DRM_UT_ATOMIC, fmt, ##__VA_ARGS__)
+ drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_ATOMIC, fmt, ##__VA_ARGS__)
#define drm_dbg_vbl(drm, fmt, ...) \
- drm_dev_dbg((drm)->dev, DRM_UT_VBL, fmt, ##__VA_ARGS__)
+ drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_VBL, fmt, ##__VA_ARGS__)
#define drm_dbg_state(drm, fmt, ...) \
- drm_dev_dbg((drm)->dev, DRM_UT_STATE, fmt, ##__VA_ARGS__)
+ drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_STATE, fmt, ##__VA_ARGS__)
#define drm_dbg_lease(drm, fmt, ...) \
- drm_dev_dbg((drm)->dev, DRM_UT_LEASE, fmt, ##__VA_ARGS__)
+ drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_LEASE, fmt, ##__VA_ARGS__)
#define drm_dbg_dp(drm, fmt, ...) \
- drm_dev_dbg((drm)->dev, DRM_UT_DP, fmt, ##__VA_ARGS__)
+ drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_DP, fmt, ##__VA_ARGS__)
#define drm_dbg_drmres(drm, fmt, ...) \
- drm_dev_dbg((drm)->dev, DRM_UT_DRMRES, fmt, ##__VA_ARGS__)
+ drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_DRMRES, fmt, ##__VA_ARGS__)
/*
--
2.30.2
next prev parent reply other threads:[~2021-04-19 22:58 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20210419225523.184856-1-lyude@redhat.com>
2021-04-19 22:55 ` [PATCH v3 01/20] drm/amdgpu: Add error handling to amdgpu_dm_initialize_dp_connector() Lyude Paul
2021-04-21 14:23 ` Mikita Lipski
2021-04-19 22:55 ` [PATCH v3 02/20] drm/dp: Add __no_check to drm_dp_aux_register() Lyude Paul
2021-04-19 22:55 ` [PATCH v3 03/20] drm/dp: Move i2c init to drm_dp_aux_init, add __must_check and fini Lyude Paul
2021-04-19 22:55 ` [PATCH v3 04/20] drm/bridge/cdns-mhdp8546: Register DP aux channel with userspace Lyude Paul
2021-04-19 22:55 ` [PATCH v3 05/20] drm/nouveau/kms/nv50-: Move AUX adapter reg to connector late register/early unregister Lyude Paul
2021-04-19 22:55 ` [PATCH v3 06/20] drm/dp: Add backpointer to drm_device in drm_dp_aux Lyude Paul
2021-04-19 22:55 ` [PATCH v3 07/20] drm/dp: Clarify DP AUX registration time Lyude Paul
2021-04-19 22:55 ` [PATCH v3 08/20] drm/dp: Pass drm_dp_aux to drm_dp_link_train_clock_recovery_delay() Lyude Paul
2021-04-19 22:55 ` [PATCH v3 09/20] drm/dp: Pass drm_dp_aux to drm_dp*_link_train_channel_eq_delay() Lyude Paul
2021-04-19 22:55 ` [PATCH v3 10/20] drm/dp: Always print aux channel name in logs Lyude Paul
2021-04-19 22:55 ` [PATCH v3 11/20] drm/dp_dual_mode: Pass drm_device to drm_dp_dual_mode_detect() Lyude Paul
2021-04-19 22:55 ` [PATCH v3 12/20] drm/dp_dual_mode: Pass drm_device to drm_dp_dual_mode_set_tmds_output() Lyude Paul
2021-04-19 22:55 ` [PATCH v3 13/20] drm/dp_dual_mode: Pass drm_device to drm_dp_dual_mode_max_tmds_clock() Lyude Paul
2021-04-19 22:55 ` [PATCH v3 14/20] drm/dp_dual_mode: Pass drm_device to drm_dp_dual_mode_get_tmds_output() Lyude Paul
2021-04-19 22:55 ` [PATCH v3 15/20] drm/dp_dual_mode: Pass drm_device to drm_lspcon_(get|set)_mode() Lyude Paul
2021-04-19 22:55 ` [PATCH v3 16/20] drm/dp_mst: Pass drm_dp_mst_topology_mgr to drm_dp_get_vc_payload_bw() Lyude Paul
2021-04-19 22:55 ` Lyude Paul [this message]
2021-04-19 22:55 ` [PATCH v3 18/20] drm/dp: Convert drm_dp_helper.c to using drm_err/drm_dbg_*() Lyude Paul
2021-04-19 22:55 ` [PATCH v3 19/20] drm/dp_dual_mode: Convert drm_dp_dual_mode_helper.c to using drm_err/drm_dbg_kms() Lyude Paul
2021-04-19 22:55 ` [PATCH v3 20/20] drm/dp_mst: Convert drm_dp_mst_topology.c to drm_err()/drm_dbg*() Lyude Paul
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