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authorHeiner Kallweit <hkallweit1@gmail.com>2017-04-12 16:33:57 -0300
committerMauro Carvalho Chehab <mchehab@s-opensource.com>2017-06-06 08:56:29 -0300
commit137edc02e7f005ca2a7060b41968aa46a3b7b048 (patch)
tree607f967c57f5372020ecaeadafa6d98b001d4653 /drivers/media
parent705aa578d408f669cd28d9de076ff14bc659371c (diff)
downloadblackbird-op-linux-137edc02e7f005ca2a7060b41968aa46a3b7b048.tar.gz
blackbird-op-linux-137edc02e7f005ca2a7060b41968aa46a3b7b048.zip
[media] rc: meson-ir: use readl_relaxed in the interrupt handler
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 <hkallweit1@gmail.com> Reviewed-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Sean Young <sean@mess.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media')
-rw-r--r--drivers/media/rc/meson-ir.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/media/rc/meson-ir.c b/drivers/media/rc/meson-ir.c
index 664c3efe1f8f..dfe9184e996c 100644
--- a/drivers/media/rc/meson-ir.c
+++ b/drivers/media/rc/meson-ir.c
@@ -85,16 +85,17 @@ 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);
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