linux-kernel - [PATCH 0/4] spi: Fix DMA bugs in (not only) spi-s3c64xx

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Date:   Fri, 16 Sep 2022 13:39:47 +0200
From:   Vincent Whitchurch <vincent.whitchurch@...s.com>
To:     <broonie@...nel.org>, <krzysztof.kozlowski@...aro.org>,
        <andi@...zian.org>
CC:     <kernel@...s.com>,
        Vincent Whitchurch <vincent.whitchurch@...s.com>,
        <alim.akhtar@...sung.com>, <linux-spi@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-samsung-soc@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: [PATCH 0/4] spi: Fix DMA bugs in (not only) spi-s3c64xx

This series fixes some bugs I found while running spi-loopback-test with
spi-s3c64xx.  The first problem (which I actually noticed while trying to fix
the second problem with transfers >64KiB) seems to be a generic issue which
affects several drivers so I fixed it in the core.

The series has been tested on ARTPEC-8, which has a version of the IP similar
to Exynos 7 and with 64 byte FIFOs (compatible with "tesla,fsd-spi").

Cc: alim.akhtar@...sung.com
Cc: linux-spi@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Cc: linux-samsung-soc@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org

Vincent Whitchurch (4):
  spi: spi-loopback-test: Add test to trigger DMA/PIO mixing
  spi: Save current RX and TX DMA devices
  spi: Fix cache corruption due to DMA/PIO overlap
  spi: s3c64xx: Fix large transfers with DMA

 drivers/spi/spi-loopback-test.c |  27 +++++++
 drivers/spi/spi-s3c64xx.c       |  10 +++
 drivers/spi/spi.c               | 126 +++++++++++++++++++++++---------
 include/linux/spi/spi.h         |   4 +
 4 files changed, 131 insertions(+), 36 deletions(-)

-- 
2.34.1