[PATCH 1/3] media: mceusb: filter out bogus timing irdata of duration 0

[Sean Young]

A mceusb device has been observed producing invalid irdata. Proactively
guard against this.

Suggested-by: Matthias Reichl <h...@horus.com>
Signed-off-by: Sean Young <s...@mess.org>
---
 drivers/media/rc/mceusb.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/media/rc/mceusb.c b/drivers/media/rc/mceusb.c
index 1619b748469b..1ca49491abc8 100644
--- a/drivers/media/rc/mceusb.c
+++ b/drivers/media/rc/mceusb.c
@@ -1177,6 +1177,11 @@ static void mceusb_process_ir_data(struct mceusb_dev 
*ir, int buf_len)
                        init_ir_raw_event(&rawir);
                        rawir.pulse = ((ir->buf_in[i] & MCE_PULSE_BIT) != 0);
                        rawir.duration = (ir->buf_in[i] & MCE_PULSE_MASK);
+                       if (unlikely(!rawir.duration)) {
+                               dev_warn(ir->dev, "nonsensical irdata %02x with 
duration 0",
+                                        ir->buf_in[i]);
+                               break;
+                       }
                        if (rawir.pulse) {
                                ir->pulse_tunit += rawir.duration;
                                ir->pulse_count++;
-- 
2.14.3