From: Daniel Vetter <daniel.vetter@ffwll.ch> To: DRI Development <dri-devel@lists.freedesktop.org> Cc: Zhen Lei <thunder.leizhen@huawei.com>, Xiyu Yang <xiyuyang19@fudan.edu.cn>, Du Cheng <ducheng2@gmail.com>, Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>, Daniel Vetter <daniel.vetter@ffwll.ch>, Intel Graphics Development <intel-gfx@lists.freedesktop.org>, Zheyu Ma <zheyuma97@gmail.com>, Matthew Wilcox <willy@infradead.org>, Claudio Suarez <cssk@net-c.es>, Thomas Zimmermann <tzimmermann@suse.de>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Alex Deucher <alexander.deucher@amd.com>, Daniel Vetter <daniel.vetter@intel.com>, Sam Ravnborg <sam@ravnborg.org>, Guenter Roeck <linux@roeck-us.net> Subject: [PATCH v3 14/17] fbcon: Move console_lock for register/unlink/unregister Date: Tue, 5 Apr 2022 23:03:32 +0200 [thread overview] Message-ID: <20220405210335.3434130-15-daniel.vetter@ffwll.ch> (raw) In-Reply-To: <20220405210335.3434130-1-daniel.vetter@ffwll.ch> Ideally console_lock becomes an implementation detail of fbcon.c and doesn't show up anywhere in fbmem.c. We're still pretty far from that, but at least the register/unregister code is there now. With this the do_fb_ioctl() handler is the only code in fbmem.c still calling console_lock(). Acked-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Cc: Daniel Vetter <daniel@ffwll.ch> Cc: Thomas Zimmermann <tzimmermann@suse.de> Cc: Du Cheng <ducheng2@gmail.com> Cc: Claudio Suarez <cssk@net-c.es> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Cc: Matthew Wilcox <willy@infradead.org> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Zheyu Ma <zheyuma97@gmail.com> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Alex Deucher <alexander.deucher@amd.com> Cc: Zhen Lei <thunder.leizhen@huawei.com> Cc: Xiyu Yang <xiyuyang19@fudan.edu.cn> --- drivers/video/fbdev/core/fbcon.c | 33 ++++++++++++++++++++++++++------ drivers/video/fbdev/core/fbmem.c | 23 ++-------------------- 2 files changed, 29 insertions(+), 27 deletions(-) diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c index 4f9752ee9189..abb419a091c6 100644 --- a/drivers/video/fbdev/core/fbcon.c +++ b/drivers/video/fbdev/core/fbcon.c @@ -2756,10 +2756,12 @@ void fbcon_fb_unbind(struct fb_info *info) int i, new_idx = -1; int idx = info->node; - WARN_CONSOLE_UNLOCKED(); + console_lock(); - if (!fbcon_has_console_bind) + if (!fbcon_has_console_bind) { + console_unlock(); return; + } for (i = first_fb_vc; i <= last_fb_vc; i++) { if (con2fb_map[i] != idx && @@ -2794,6 +2796,8 @@ void fbcon_fb_unbind(struct fb_info *info) } fbcon_unbind(); } + + console_unlock(); } /* called with console_lock held */ @@ -2801,10 +2805,12 @@ void fbcon_fb_unregistered(struct fb_info *info) { int i, idx; - WARN_CONSOLE_UNLOCKED(); + console_lock(); - if (deferred_takeover) + if (deferred_takeover) { + console_unlock(); return; + } idx = info->node; for (i = first_fb_vc; i <= last_fb_vc; i++) { @@ -2833,6 +2839,7 @@ void fbcon_fb_unregistered(struct fb_info *info) if (!num_registered_fb) do_unregister_con_driver(&fb_con); + console_unlock(); } void fbcon_remap_all(struct fb_info *info) @@ -2890,19 +2897,27 @@ static inline void fbcon_select_primary(struct fb_info *info) } #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */ +static bool lockless_register_fb; +module_param_named_unsafe(lockless_register_fb, lockless_register_fb, bool, 0400); +MODULE_PARM_DESC(lockless_register_fb, + "Lockless framebuffer registration for debugging [default=off]"); + /* called with console_lock held */ int fbcon_fb_registered(struct fb_info *info) { int ret = 0, i, idx; - WARN_CONSOLE_UNLOCKED(); + if (!lockless_register_fb) + console_lock(); + else + atomic_inc(&ignore_console_lock_warning); idx = info->node; fbcon_select_primary(info); if (deferred_takeover) { pr_info("fbcon: Deferring console take-over\n"); - return 0; + goto out; } if (info_idx == -1) { @@ -2922,6 +2937,12 @@ int fbcon_fb_registered(struct fb_info *info) } } +out: + if (!lockless_register_fb) + console_unlock(); + else + atomic_dec(&ignore_console_lock_warning); + return ret; } diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c index 0e68d9456bc2..bdd00d381bbc 100644 --- a/drivers/video/fbdev/core/fbmem.c +++ b/drivers/video/fbdev/core/fbmem.c @@ -1590,14 +1590,9 @@ static void do_remove_conflicting_framebuffers(struct apertures_struct *a, } } -static bool lockless_register_fb; -module_param_named_unsafe(lockless_register_fb, lockless_register_fb, bool, 0400); -MODULE_PARM_DESC(lockless_register_fb, - "Lockless framebuffer registration for debugging [default=off]"); - static int do_register_framebuffer(struct fb_info *fb_info) { - int i, ret; + int i; struct fb_videomode mode; if (fb_check_foreignness(fb_info)) @@ -1666,17 +1661,7 @@ static int do_register_framebuffer(struct fb_info *fb_info) } #endif - if (!lockless_register_fb) - console_lock(); - else - atomic_inc(&ignore_console_lock_warning); - ret = fbcon_fb_registered(fb_info); - - if (!lockless_register_fb) - console_unlock(); - else - atomic_dec(&ignore_console_lock_warning); - return ret; + return fbcon_fb_registered(fb_info); } static void unbind_console(struct fb_info *fb_info) @@ -1686,9 +1671,7 @@ static void unbind_console(struct fb_info *fb_info) if (WARN_ON(i < 0 || i >= FB_MAX || registered_fb[i] != fb_info)) return; - console_lock(); fbcon_fb_unbind(fb_info); - console_unlock(); } static void unlink_framebuffer(struct fb_info *fb_info) @@ -1731,9 +1714,7 @@ static void do_unregister_framebuffer(struct fb_info *fb_info) fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event); } #endif - console_lock(); fbcon_fb_unregistered(fb_info); - console_unlock(); /* this may free fb info */ put_fb_info(fb_info); -- 2.34.1
WARNING: multiple messages have this Message-ID (diff)
From: Daniel Vetter <daniel.vetter@ffwll.ch> To: DRI Development <dri-devel@lists.freedesktop.org> Cc: Zhen Lei <thunder.leizhen@huawei.com>, Xiyu Yang <xiyuyang19@fudan.edu.cn>, Du Cheng <ducheng2@gmail.com>, Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>, Daniel Vetter <daniel.vetter@ffwll.ch>, Intel Graphics Development <intel-gfx@lists.freedesktop.org>, Zheyu Ma <zheyuma97@gmail.com>, Matthew Wilcox <willy@infradead.org>, Thomas Zimmermann <tzimmermann@suse.de>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Alex Deucher <alexander.deucher@amd.com>, Daniel Vetter <daniel.vetter@intel.com>, Sam Ravnborg <sam@ravnborg.org>, Guenter Roeck <linux@roeck-us.net> Subject: [Intel-gfx] [PATCH v3 14/17] fbcon: Move console_lock for register/unlink/unregister Date: Tue, 5 Apr 2022 23:03:32 +0200 [thread overview] Message-ID: <20220405210335.3434130-15-daniel.vetter@ffwll.ch> (raw) In-Reply-To: <20220405210335.3434130-1-daniel.vetter@ffwll.ch> Ideally console_lock becomes an implementation detail of fbcon.c and doesn't show up anywhere in fbmem.c. We're still pretty far from that, but at least the register/unregister code is there now. With this the do_fb_ioctl() handler is the only code in fbmem.c still calling console_lock(). Acked-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Cc: Daniel Vetter <daniel@ffwll.ch> Cc: Thomas Zimmermann <tzimmermann@suse.de> Cc: Du Cheng <ducheng2@gmail.com> Cc: Claudio Suarez <cssk@net-c.es> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Cc: Matthew Wilcox <willy@infradead.org> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Zheyu Ma <zheyuma97@gmail.com> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Alex Deucher <alexander.deucher@amd.com> Cc: Zhen Lei <thunder.leizhen@huawei.com> Cc: Xiyu Yang <xiyuyang19@fudan.edu.cn> --- drivers/video/fbdev/core/fbcon.c | 33 ++++++++++++++++++++++++++------ drivers/video/fbdev/core/fbmem.c | 23 ++-------------------- 2 files changed, 29 insertions(+), 27 deletions(-) diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c index 4f9752ee9189..abb419a091c6 100644 --- a/drivers/video/fbdev/core/fbcon.c +++ b/drivers/video/fbdev/core/fbcon.c @@ -2756,10 +2756,12 @@ void fbcon_fb_unbind(struct fb_info *info) int i, new_idx = -1; int idx = info->node; - WARN_CONSOLE_UNLOCKED(); + console_lock(); - if (!fbcon_has_console_bind) + if (!fbcon_has_console_bind) { + console_unlock(); return; + } for (i = first_fb_vc; i <= last_fb_vc; i++) { if (con2fb_map[i] != idx && @@ -2794,6 +2796,8 @@ void fbcon_fb_unbind(struct fb_info *info) } fbcon_unbind(); } + + console_unlock(); } /* called with console_lock held */ @@ -2801,10 +2805,12 @@ void fbcon_fb_unregistered(struct fb_info *info) { int i, idx; - WARN_CONSOLE_UNLOCKED(); + console_lock(); - if (deferred_takeover) + if (deferred_takeover) { + console_unlock(); return; + } idx = info->node; for (i = first_fb_vc; i <= last_fb_vc; i++) { @@ -2833,6 +2839,7 @@ void fbcon_fb_unregistered(struct fb_info *info) if (!num_registered_fb) do_unregister_con_driver(&fb_con); + console_unlock(); } void fbcon_remap_all(struct fb_info *info) @@ -2890,19 +2897,27 @@ static inline void fbcon_select_primary(struct fb_info *info) } #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */ +static bool lockless_register_fb; +module_param_named_unsafe(lockless_register_fb, lockless_register_fb, bool, 0400); +MODULE_PARM_DESC(lockless_register_fb, + "Lockless framebuffer registration for debugging [default=off]"); + /* called with console_lock held */ int fbcon_fb_registered(struct fb_info *info) { int ret = 0, i, idx; - WARN_CONSOLE_UNLOCKED(); + if (!lockless_register_fb) + console_lock(); + else + atomic_inc(&ignore_console_lock_warning); idx = info->node; fbcon_select_primary(info); if (deferred_takeover) { pr_info("fbcon: Deferring console take-over\n"); - return 0; + goto out; } if (info_idx == -1) { @@ -2922,6 +2937,12 @@ int fbcon_fb_registered(struct fb_info *info) } } +out: + if (!lockless_register_fb) + console_unlock(); + else + atomic_dec(&ignore_console_lock_warning); + return ret; } diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c index 0e68d9456bc2..bdd00d381bbc 100644 --- a/drivers/video/fbdev/core/fbmem.c +++ b/drivers/video/fbdev/core/fbmem.c @@ -1590,14 +1590,9 @@ static void do_remove_conflicting_framebuffers(struct apertures_struct *a, } } -static bool lockless_register_fb; -module_param_named_unsafe(lockless_register_fb, lockless_register_fb, bool, 0400); -MODULE_PARM_DESC(lockless_register_fb, - "Lockless framebuffer registration for debugging [default=off]"); - static int do_register_framebuffer(struct fb_info *fb_info) { - int i, ret; + int i; struct fb_videomode mode; if (fb_check_foreignness(fb_info)) @@ -1666,17 +1661,7 @@ static int do_register_framebuffer(struct fb_info *fb_info) } #endif - if (!lockless_register_fb) - console_lock(); - else - atomic_inc(&ignore_console_lock_warning); - ret = fbcon_fb_registered(fb_info); - - if (!lockless_register_fb) - console_unlock(); - else - atomic_dec(&ignore_console_lock_warning); - return ret; + return fbcon_fb_registered(fb_info); } static void unbind_console(struct fb_info *fb_info) @@ -1686,9 +1671,7 @@ static void unbind_console(struct fb_info *fb_info) if (WARN_ON(i < 0 || i >= FB_MAX || registered_fb[i] != fb_info)) return; - console_lock(); fbcon_fb_unbind(fb_info); - console_unlock(); } static void unlink_framebuffer(struct fb_info *fb_info) @@ -1731,9 +1714,7 @@ static void do_unregister_framebuffer(struct fb_info *fb_info) fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event); } #endif - console_lock(); fbcon_fb_unregistered(fb_info); - console_unlock(); /* this may free fb info */ put_fb_info(fb_info); -- 2.34.1
next prev parent reply other threads:[~2022-04-05 21:04 UTC|newest] Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-04-05 21:03 [PATCH v3 00/17] fbcon cleanups Daniel Vetter 2022-04-05 21:03 ` [Intel-gfx] " Daniel Vetter 2022-04-05 21:03 ` [Intel-gfx] [PATCH v3 01/17] fbcon: delete a few unneeded forward decl Daniel Vetter 2022-04-05 21:03 ` Daniel Vetter 2022-04-05 23:36 ` Fabio Estevam 2022-04-05 23:36 ` [Intel-gfx] " Fabio Estevam 2022-04-05 21:03 ` [PATCH v3 02/17] fbcon: Move fbcon_bmove(_rec) functions Daniel Vetter 2022-04-05 21:03 ` [Intel-gfx] " Daniel Vetter 2022-04-05 21:03 ` [PATCH v3 03/17] fbcon: Introduce wrapper for console->fb_info lookup Daniel Vetter 2022-04-05 21:03 ` [Intel-gfx] " Daniel Vetter 2022-04-05 21:03 ` [PATCH v3 04/17] fbcon: delete delayed loading code Daniel Vetter 2022-04-05 21:03 ` [Intel-gfx] " Daniel Vetter 2022-04-05 21:03 ` [PATCH v3 05/17] fbdev/sysfs: Fix locking Daniel Vetter 2022-04-05 21:03 ` [Intel-gfx] " Daniel Vetter 2022-04-05 21:03 ` [PATCH v3 06/17] fbcon: Use delayed work for cursor Daniel Vetter 2022-04-05 21:03 ` [Intel-gfx] " Daniel Vetter 2022-04-05 21:03 ` [PATCH v3 07/17] fbcon: Replace FBCON_FLAGS_INIT with a boolean Daniel Vetter 2022-04-05 21:03 ` [Intel-gfx] " Daniel Vetter 2022-04-05 21:03 ` [PATCH v3 08/17] fb: Delete fb_info->queue Daniel Vetter 2022-04-05 21:03 ` Daniel Vetter 2022-04-05 21:03 ` [Intel-gfx] " Daniel Vetter 2022-04-05 21:03 ` [PATCH v3 09/17] fbcon: Extract fbcon_open/release helpers Daniel Vetter 2022-04-05 21:03 ` [Intel-gfx] " Daniel Vetter 2022-04-05 21:03 ` [PATCH v3 10/17] fbcon: Ditch error handling for con2fb_release_oldinfo Daniel Vetter 2022-04-05 21:03 ` [Intel-gfx] " Daniel Vetter 2022-04-05 21:03 ` [PATCH v3 11/17] fbcon: move more common code into fb_open() Daniel Vetter 2022-04-05 21:03 ` [Intel-gfx] " Daniel Vetter 2022-04-05 21:03 ` [PATCH v3 12/17] fbcon: use lock_fb_info in fbcon_open/release Daniel Vetter 2022-04-05 21:03 ` [Intel-gfx] " Daniel Vetter 2022-04-05 21:03 ` [PATCH v3 13/17] fbcon: Consistently protect deferred_takeover with console_lock() Daniel Vetter 2022-04-05 21:03 ` [Intel-gfx] " Daniel Vetter 2022-04-05 21:03 ` Daniel Vetter [this message] 2022-04-05 21:03 ` [Intel-gfx] [PATCH v3 14/17] fbcon: Move console_lock for register/unlink/unregister Daniel Vetter 2022-04-11 22:27 ` Nathan Chancellor 2022-04-11 22:27 ` [Intel-gfx] " Nathan Chancellor 2022-04-13 8:13 ` Daniel Vetter 2022-04-13 8:13 ` [Intel-gfx] " Daniel Vetter 2022-04-05 21:03 ` [PATCH v3 15/17] fbcon: Move more code into fbcon_release Daniel Vetter 2022-04-05 21:03 ` [Intel-gfx] " Daniel Vetter 2022-04-05 21:03 ` [PATCH v3 16/17] fbcon: untangle fbcon_exit Daniel Vetter 2022-04-05 21:03 ` [Intel-gfx] " Daniel Vetter 2022-04-05 21:03 ` [PATCH v3 17/17] fbcon: Maintain a private array of fb_info Daniel Vetter 2022-04-05 21:03 ` [Intel-gfx] " Daniel Vetter 2022-04-06 1:15 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for fbcon cleanups Patchwork 2022-04-06 1:17 ` [Intel-gfx] ✗ Fi.CI.SPARSE: " Patchwork 2022-04-06 1:21 ` [Intel-gfx] ✗ Fi.CI.DOCS: " Patchwork 2022-04-06 1:45 ` [Intel-gfx] ✓ Fi.CI.BAT: success " Patchwork 2022-04-06 7:09 ` [Intel-gfx] ✗ Fi.CI.IGT: failure " Patchwork 2022-04-08 7:51 ` [PATCH v3 00/17] " Daniel Vetter 2022-04-08 7:51 ` [Intel-gfx] " Daniel Vetter
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