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Date: Wed, 27 Mar 2024 17:08:08 +0100
From: Richard Genoud <richard.genoud@...il.com>
To: "Jiri Slaby (SUSE)" <jirislaby@...nel.org>, linux-serial@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, Al Cooper <alcooperx@...il.com>,
 Alexander Shiyan <shc_work@...l.ru>,
 Alexandre Belloni <alexandre.belloni@...tlin.com>,
 Alexandre Torgue <alexandre.torgue@...s.st.com>,
 Alim Akhtar <alim.akhtar@...sung.com>,
 Andrew Morton <akpm@...ux-foundation.org>,
 "Aneesh Kumar K.V" <aneesh.kumar@...nel.org>,
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
 Baolin Wang <baolin.wang@...ux.alibaba.com>, Baruch Siach
 <baruch@...s.co.il>, Bjorn Andersson <andersson@...nel.org>,
 Claudiu Beznea <claudiu.beznea@...on.dev>,
 "David S. Miller" <davem@...emloft.net>, Fabio Estevam <festevam@...il.com>,
 Hammer Hsieh <hammerh0314@...il.com>,
 Christian König <christian.koenig@....com>,
 Christophe Leroy <christophe.leroy@...roup.eu>,
 Chunyan Zhang <zhang.lyra@...il.com>, Jerome Brunet <jbrunet@...libre.com>,
 Jonathan Hunter <jonathanh@...dia.com>, Kevin Hilman <khilman@...libre.com>,
 Konrad Dybcio <konrad.dybcio@...aro.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
 Kumaravel Thiagarajan <kumaravel.thiagarajan@...rochip.com>,
 Laxman Dewangan <ldewangan@...dia.com>,
 linux-arm-kernel@...ts.infradead.org, linux-arm-msm@...r.kernel.org,
 "Maciej W. Rozycki" <macro@...am.me.uk>,
 Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
 Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
 Matthias Brugger <matthias.bgg@...il.com>,
 Maxime Coquelin <mcoquelin.stm32@...il.com>,
 Michael Ellerman <mpe@...erman.id.au>, Michal Simek <michal.simek@....com>,
 "Naveen N. Rao" <naveen.n.rao@...ux.ibm.com>,
 Neil Armstrong <neil.armstrong@...aro.org>,
 Nicolas Ferre <nicolas.ferre@...rochip.com>,
 Nicholas Piggin <npiggin@...il.com>, Orson Zhai <orsonzhai@...il.com>,
 Pali Rohár <pali@...nel.org>,
 Patrice Chotard <patrice.chotard@...s.st.com>,
 Peter Korsgaard <jacmet@...site.dk>,
 Richard Genoud <richard.genoud@...il.com>,
 Russell King <linux@...linux.org.uk>, Sascha Hauer <s.hauer@...gutronix.de>,
 Shawn Guo <shawnguo@...nel.org>, Stefani Seibold <stefani@...bold.net>,
 Sumit Semwal <sumit.semwal@...aro.org>,
 Taichi Sugaya <sugaya.taichi@...ionext.com>,
 Takao Orito <orito.takao@...ionext.com>,
 Tharun Kumar P <tharunkumar.pasumarthi@...rochip.com>,
 Thierry Reding <thierry.reding@...il.com>, Timur Tabi <timur@...nel.org>,
 Vineet Gupta <vgupta@...nel.org>
Subject: Re: [RFT 00/15] tty: serial: switch from circ_buf to kfifo

Le 19/03/2024 à 10:52, Jiri Slaby (SUSE) a écrit :
> This series switches tty serial layer to use kfifo instead of circ_buf.
> Excerpt from the switching patch:
> """
> Switch from struct circ_buf to proper kfifo. kfifo provides much better
> API, esp. when wrap-around of the buffer needs to be taken into account.
> Look at pl011_dma_tx_refill() or cpm_uart_tx_pump() changes for example.
> 
> Kfifo API can also fill in scatter-gather DMA structures, so it easier
> for that use case too. Look at lpuart_dma_tx() for example. Note that
> not all drivers can be converted to that (like atmel_serial), they
> handle DMA specially.
> 
> Note that usb-serial uses kfifo for TX for ages.
> """
> 
> This is Request for Testing as I cannot test all the changes
> (obviously). So please test your HW's serial properly.

Tested-by: Richard Genoud <richard.genoud@...il.com> # on at91sam9g20-ek sama5d3_xplained and sama5d2_xplained

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