7022 (rev ff)

[ate-wang]

Serial controller: Xilinx Corporation Device 7022 (rev ff)

[ 2767.390931] xdma:xdma_xfer_submit: xfer 0x00000000c2007a2b,28, s 0x1 timed out, ep 0x3100001c.
[ 2767.390932] xdma:engine_reg_dump: engine->status -1.
[ 2767.439045] xdma:engine_reg_dump: 0-H2C0-MM: ioread32(0x00000000fb2c77c2) = 0xffffffff (id).
[ 2767.439045] xdma:engine_reg_dump: 0-H2C0-MM: engine id missing, 0xfff00000 exp. & 0xfff00000 = 0x1fc00000
[ 2767.439047] xdma:engine_status_read: Failed to dump register
[ 2767.439047] xdma:xdma_xfer_submit: Failed to read engine status
I would like to ask what causes this problem, how to solve it, and why pcie returns ff