From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: linuxppc-dev@lists.ozlabs.org, Nathan Lynch <nathanl@linux.ibm.com>
Cc: gregkh@linuxfoundation.org, jirislaby@kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] powerpc/udbg_hvc: retry putc on -EAGAIN
Date: Sun, 06 Jun 2021 22:08:38 +1000 [thread overview]
Message-ID: <162298131809.2353459.1796595260393131161.b4-ty@ellerman.id.au> (raw)
In-Reply-To: <20210514214422.3019105-1-nathanl@linux.ibm.com>
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
prev parent reply other threads:[~2021-06-06 12:17 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-14 21:44 [PATCH] powerpc/udbg_hvc: retry putc on -EAGAIN Nathan Lynch
2021-05-21 12:47 ` Greg KH
2021-05-23 10:51 ` Michael Ellerman
2021-05-27 11:10 ` Greg KH
2021-06-06 12:08 ` Michael Ellerman [this message]
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