From: Neil Armstrong narmstrong@baylibre.com
[ Upstream commit 9f7406d6b56b4b71a12480b68221755ea7b3e0ee ]
With fast_io enabled, spinlock_irq is used for read/write operations, thus leading to : BUG: sleeping function called from invalid context at [snip]/ao-cec-g12a.c:379 in_atomic(): 1, irqs_disabled(): 128, pid: 1451, name: irq/14-ff800280 [snip] Call trace: dump_backtrace+0x0/0x180 show_stack+0x14/0x1c dump_stack+0xa8/0xe0 ___might_sleep+0xf4/0x104 __might_sleep+0x4c/0x80 meson_ao_cec_g12a_read+0x7c/0x164 regmap_read+0x16c/0x1b0 meson_ao_cec_g12a_irq_thread+0xcc/0x200 irq_thread_fn+0x2c/0x60 irq_thread+0x14c/0x1fc kthread+0x11c/0x12c ret_from_fork+0x10/0x18
Simply remove fast_io to use mutexes instead.
Fixes: b7778c46683c ("media: platform: meson: Add Amlogic Meson G12A AO CEC Controller driver")
Signed-off-by: Neil Armstrong narmstrong@baylibre.com Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl Signed-off-by: Mauro Carvalho Chehab mchehab+samsung@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/media/platform/meson/ao-cec-g12a.c | 1 - 1 file changed, 1 deletion(-)
diff --git a/drivers/media/platform/meson/ao-cec-g12a.c b/drivers/media/platform/meson/ao-cec-g12a.c index 3620a1e310f5..ddfd060625da 100644 --- a/drivers/media/platform/meson/ao-cec-g12a.c +++ b/drivers/media/platform/meson/ao-cec-g12a.c @@ -415,7 +415,6 @@ static const struct regmap_config meson_ao_cec_g12a_cec_regmap_conf = { .reg_read = meson_ao_cec_g12a_read, .reg_write = meson_ao_cec_g12a_write, .max_register = 0xffff, - .fast_io = true, };
static inline void