[U-Boot] u-boot hangs waiting for serial input

[Dipanjan Das]

I have compiled an older version of u-boot for ARM versatilepb board and
booted in qemu as: qemu-system-arm -M versatilepb -m 128M -nographic
-kernel flash.bin

It boots fine, basic commans like `printenv` works. However, issuing
`loads` makes the bootloader wait indefinitely. No keypress works. The
prompt comes back if the command aborted by pressing Ctrl+C. I am not sure
if it is u-boot or qemu is misbehaving. Any suggestion?

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Thanks & Regards,
Dipanjan