We don't need the memory barriers here and an interrupt handler should be as fast as possible. Therefore switch to readl_relaxed.
Signed-off-by: Heiner Kallweit <[email protected]> Reviewed-by: Neil Armstrong <[email protected]> --- v2: - added R-b --- drivers/media/rc/meson-ir.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/media/rc/meson-ir.c b/drivers/media/rc/meson-ir.c index cf8943d2..1c72593d 100644 --- a/drivers/media/rc/meson-ir.c +++ b/drivers/media/rc/meson-ir.c @@ -83,16 +83,17 @@ static void meson_ir_set_mask(struct meson_ir *ir, unsigned int reg, static irqreturn_t meson_ir_irq(int irqno, void *dev_id) { struct meson_ir *ir = dev_id; - u32 duration; + u32 duration, status; DEFINE_IR_RAW_EVENT(rawir); spin_lock(&ir->lock); - duration = readl(ir->reg + IR_DEC_REG1); + duration = readl_relaxed(ir->reg + IR_DEC_REG1); duration = FIELD_GET(REG1_TIME_IV_MASK, duration); rawir.duration = US_TO_NS(duration * MESON_TRATE); - rawir.pulse = !!(readl(ir->reg + IR_DEC_STATUS) & STATUS_IR_DEC_IN); + status = readl_relaxed(ir->reg + IR_DEC_STATUS); + rawir.pulse = !!(status & STATUS_IR_DEC_IN); ir_raw_event_store_with_filter(ir->rc, &rawir); ir_raw_event_handle(ir->rc); -- 2.12.2
