Comments by shahrilhafiz (Top 4 by date)

Did you "Pause" each of the getline? and get the correct data while fully running it cause the data not correct?

Thanks for your reply,

I'm not exchanging data in user space, all happen in driver space.
The PCIe write function doesn't use mutex. The PCIe write prototype:

void __write(u32* __iomem bar_base, u32 addr, u32 wdata)
{
bar_base[ addr / 4] = wdata;
wmb();
return;
}

Sorry for that, I'm running Linux on ARM and accessing FPGA through PCIe. I can perform read/write to PCIe in driver code but not in ISR.