Messages in this thread | | | Date | Tue, 19 Apr 2016 16:23:29 -0700 | From | Frank Rowand <> | Subject | regression: 3a878c430fd6 ("tty: serial: msm: Add TX DMA support") drops data |
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Hi Ivan,
It appears that I have found a regression caused by 3a878c430fd6 ("tty: serial: msm: Add TX DMA support").
When I cat a file slightly larger than 126000 bytes on the console, viewed via minicom connected to the serial port, I am losing random chunks of data, almost always three bytes in length. I have also seen a lost chunk of two bytes.
I am using the 8074 dragonboard, with the dts of arch/arm/boot/dts/qcom-apq8074-dragonboard.dts. The dts node is serial@f991e000, which has a compatible of "qcom,msm-uartdm-v1.4", so is_uartdm should be UARTDM_1P4.
Do you have any thoughts on what might be going wrong, or what I can do to debug this?
Thanks,
Frank
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