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Why do I have Rx Fifo overrun on uarts when I plugged USB 3 key in IMX6Q ?

Question asked by Alexis Fronteau on Jun 18, 2018
Latest reply on Jun 18, 2018 by igorpadykov

Hi,

I have an Imx6q collecting several sensors data on differents uarts. It works fine but I have overrun on received data when I plugged an USB3 key : 

   [2454.926806] usb 3-1: new SuperSpeed USB device number 3 using xhci_hcd
   [2454.933404] imx-uart 21f0000.serial: Rx FIFO overrun
   [ 2454.938476] imx-uart 21f4000.serial: Rx FIFO overrun
   [ 2454.943501] imx-uart 21f0000.serial: Rx FIFO overrun

   [ 2454.967902] usb 3-1: Parent hub missing LPM exit latency info. Power management will be impacted.
   [ 2454.982832] usb-storage 3-1:1.0: USB Mass Storage device detected
   [ 2454.992439] scsi2 : usb-storage 3-1:1.0

   [ 2455.997278] scsi 2:0:0:0: Direct-Access Corsair Voyager GS 000A PQ: 0 ANSI: 6
   [ 2456.009700] sd 2:0:0:0: [sdb] 123600896 512-byte logical blocks: (63.2 GB/58.9 GiB)
   [ 2456.017918] sd 2:0:0:0: [sdb] Write Protect is off
   [ 2456.023235] sd 2:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
   [ 2456.084890] sdb: sdb1
   [ 2456.090274] sd 2:0:0:0: [sdb] Attached SCSI removable disk

 

I would like to know if there are some way connected and if I can do something to avoid this issued. (I work with the linux 3.14 kernel)

 

Thanks

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