On Fri, 14 May 2021 16:44:22 -0500, Nathan Lynch wrote:
hvterm_raw_put_chars() calls hvc_put_chars(), which may return -EAGAIN
when the underlying hcall returns a "busy" status, but udbg_hvc_putc()
doesn't handle this. When using xmon on a PowerVM guest, this can
result in incomplete or garbled output when printing relatively large
amounts of data quickly, such as when dumping the kernel log buffer.
Call again on -EAGAIN.
Applied to powerpc/next.
[1/1] powerpc/udbg_hvc: retry putc on -EAGAIN
https://git.kernel.org/powerpc/c/027f55e87c3094270a3223f7331d033fe15a2b3f
cheers