From: Rob Landley <rob@landley.net>
To: Geert Uytterhoeven <geert+renesas@glider.be>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jiri Slaby <jslaby@suse.com>
Cc: Ulrich Hecht <uli+renesas@fpond.eu>,
Wolfram Sang <wsa+renesas@sang-engineering.com>,
Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>,
Yoshinori Sato <ysato@users.sourceforge.jp>,
linux-renesas-soc@vger.kernel.org, linux-sh@vger.kernel.org,
linux-serial@vger.kernel.org
Subject: Re: [PATCH v4 0/4] serial: sh-sci: Fix fallback to PIO on DMA failure
Date: Sat, 15 Dec 2018 20:22:42 -0600 [thread overview]
Message-ID: <c6dd8a4a-234c-ff1e-0d22-7af61dcec427@landley.net> (raw)
In-Reply-To: <20181213184444.21904-1-geert+renesas@glider.be>
On 12/13/18 12:44 PM, Geert Uytterhoeven wrote:
> Hi Greg, Jiri,
>
> When submitting a DMA request fails, the sh-sci driver is supposed to
> fall back to PIO. However, this never really worked due to various
> reasons (sh-sci driver issues and dmaengine framework limitations).
Is it possible to test this under qemu-system-sh4? (Does that emulate the DMA
controller?)
Rob
next prev parent reply other threads:[~2018-12-16 2:22 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-13 18:44 [PATCH v4 0/4] serial: sh-sci: Fix fallback to PIO on DMA failure Geert Uytterhoeven
2018-12-13 18:44 ` [PATCH v4 1/4] serial: sh-sci: Fix locking in sci_submit_rx() Geert Uytterhoeven
2018-12-17 13:17 ` Simon Horman
2018-12-13 18:44 ` [PATCH v4 2/4] serial: sh-sci: Fix crash in rx_timer_fn() on PIO fallback Geert Uytterhoeven
2018-12-17 13:22 ` Simon Horman
2018-12-17 13:27 ` Geert Uytterhoeven
2018-12-17 14:50 ` Simon Horman
2018-12-13 18:44 ` [PATCH v4 3/4] serial: sh-sci: Resume PIO in sci_rx_interrupt() on DMA failure Geert Uytterhoeven
2018-12-14 16:14 ` Wolfram Sang
2018-12-17 13:25 ` Simon Horman
2018-12-13 18:44 ` [PATCH v4 4/4] serial: sh-sci: Fix fallback to PIO in sci_dma_rx_complete() Geert Uytterhoeven
2018-12-17 13:29 ` Simon Horman
2018-12-16 2:22 ` Rob Landley [this message]
2018-12-16 8:27 ` [PATCH v4 0/4] serial: sh-sci: Fix fallback to PIO on DMA failure Geert Uytterhoeven
2018-12-17 14:05 ` Greg Kroah-Hartman
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