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authorHans Verkuil <hverkuil@xs4all.nl>2021-02-26 11:37:47 +0100
committerMauro Carvalho Chehab <mchehab+huawei@kernel.org>2021-03-11 11:40:28 +0100
commitf09f9f93afad770a04b35235a0aa465fcc8d6e3d (patch)
tree8ede8f189b650e40d7a44810976a841ea69c6988 /drivers
parenta38fd8748464831584a19438cbb3082b5a2dab15 (diff)
media: rc: compile rc-cec.c into rc-core
The rc-cec keymap is unusual in that it can't be built as a module, instead it is registered directly in rc-main.c if CONFIG_MEDIA_CEC_RC is set. This is because it can be called from drm_dp_cec_set_edid() via cec_register_adapter() in an asynchronous context, and it is not allowed to use request_module() to load rc-cec.ko in that case. Trying to do so results in a 'WARN_ON_ONCE(wait && current_is_async())'. Since this keymap is only used if CONFIG_MEDIA_CEC_RC is set, we just compile this keymap into the rc-core module and never as a separate module. Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Fixes: 2c6d1fffa1d9 (drm: add support for DisplayPort CEC-Tunneling-over-AUX) Reported-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Sean Young <sean@mess.org> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/media/rc/Makefile1
-rw-r--r--drivers/media/rc/keymaps/Makefile1
-rw-r--r--drivers/media/rc/keymaps/rc-cec.c28
-rw-r--r--drivers/media/rc/rc-main.c6
4 files changed, 18 insertions, 18 deletions
diff --git a/drivers/media/rc/Makefile b/drivers/media/rc/Makefile
index 5bb2932ab119..ff6a8fc4c38e 100644
--- a/drivers/media/rc/Makefile
+++ b/drivers/media/rc/Makefile
@@ -5,6 +5,7 @@ obj-y += keymaps/
obj-$(CONFIG_RC_CORE) += rc-core.o
rc-core-y := rc-main.o rc-ir-raw.o
rc-core-$(CONFIG_LIRC) += lirc_dev.o
+rc-core-$(CONFIG_MEDIA_CEC_RC) += keymaps/rc-cec.o
rc-core-$(CONFIG_BPF_LIRC_MODE2) += bpf-lirc.o
obj-$(CONFIG_IR_NEC_DECODER) += ir-nec-decoder.o
obj-$(CONFIG_IR_RC5_DECODER) += ir-rc5-decoder.o
diff --git a/drivers/media/rc/keymaps/Makefile b/drivers/media/rc/keymaps/Makefile
index b252a1d2ebd6..cc6662e1903f 100644
--- a/drivers/media/rc/keymaps/Makefile
+++ b/drivers/media/rc/keymaps/Makefile
@@ -21,7 +21,6 @@ obj-$(CONFIG_RC_MAP) += rc-adstech-dvb-t-pci.o \
rc-behold.o \
rc-behold-columbus.o \
rc-budget-ci-old.o \
- rc-cec.o \
rc-cinergy-1400.o \
rc-cinergy.o \
rc-d680-dmb.o \
diff --git a/drivers/media/rc/keymaps/rc-cec.c b/drivers/media/rc/keymaps/rc-cec.c
index 3e3bd11092b4..068e22aeac8c 100644
--- a/drivers/media/rc/keymaps/rc-cec.c
+++ b/drivers/media/rc/keymaps/rc-cec.c
@@ -1,6 +1,16 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/* Keytable for the CEC remote control
*
+ * This keymap is unusual in that it can't be built as a module,
+ * instead it is registered directly in rc-main.c if CONFIG_MEDIA_CEC_RC
+ * is set. This is because it can be called from drm_dp_cec_set_edid() via
+ * cec_register_adapter() in an asynchronous context, and it is not
+ * allowed to use request_module() to load rc-cec.ko in that case.
+ *
+ * Since this keymap is only used if CONFIG_MEDIA_CEC_RC is set, we
+ * just compile this keymap into the rc-core module and never as a
+ * separate module.
+ *
* Copyright (c) 2015 by Kamil Debski
*/
@@ -152,7 +162,7 @@ static struct rc_map_table cec[] = {
/* 0x77-0xff: Reserved */
};
-static struct rc_map_list cec_map = {
+struct rc_map_list cec_map = {
.map = {
.scan = cec,
.size = ARRAY_SIZE(cec),
@@ -160,19 +170,3 @@ static struct rc_map_list cec_map = {
.name = RC_MAP_CEC,
}
};
-
-static int __init init_rc_map_cec(void)
-{
- return rc_map_register(&cec_map);
-}
-
-static void __exit exit_rc_map_cec(void)
-{
- rc_map_unregister(&cec_map);
-}
-
-module_init(init_rc_map_cec);
-module_exit(exit_rc_map_cec);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Kamil Debski");
diff --git a/drivers/media/rc/rc-main.c b/drivers/media/rc/rc-main.c
index 1fd62c1dac76..8e88dc8ea6c5 100644
--- a/drivers/media/rc/rc-main.c
+++ b/drivers/media/rc/rc-main.c
@@ -2069,6 +2069,9 @@ static int __init rc_core_init(void)
led_trigger_register_simple("rc-feedback", &led_feedback);
rc_map_register(&empty_map);
+#ifdef CONFIG_MEDIA_CEC_RC
+ rc_map_register(&cec_map);
+#endif
return 0;
}
@@ -2078,6 +2081,9 @@ static void __exit rc_core_exit(void)
lirc_dev_exit();
class_unregister(&rc_class);
led_trigger_unregister_simple(led_feedback);
+#ifdef CONFIG_MEDIA_CEC_RC
+ rc_map_unregister(&cec_map);
+#endif
rc_map_unregister(&empty_map);
}