XDMA: fix decs_cmpl and flush when eop reviced - Githubissues

Xilinx / dma_ip_drivers

Xilinx QDMA IP Drivers

https://xilinx.github.io/dma_ip_drivers/

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XDMA: fix decs_cmpl and flush when eop reviced #161

Open Jomit626 opened 2 years ago

Jomit626 commented 2 years ago

Problem:

Opening c2h channel with O_TRUNC option might cause the read syscall to return a random number.
Sometimes a read() syscall will be split into multiple transfers. When the O_TRUNC option is set, the driver flushes the results immediately after the first transfer, regardless of whether EOP is received or not.

This PR tries to fix these problems I meet.