mbox series

[v2,0/4] spi: Fix DMA bugs in (not only) spi-s3c64xx

Message ID 20220927112117.77599-1-vincent.whitchurch@axis.com
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Series spi: Fix DMA bugs in (not only) spi-s3c64xx | expand

Message

Vincent Whitchurch Sept. 27, 2022, 11:21 a.m. UTC 
v2:
- Drop merged patch adding new test to spi-loopback-test
- Fix compiler warning in !HAS_DMA builds
- Add support to split transfers to core

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@samsung.com
Cc: linux-spi@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-samsung-soc@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org

Vincent Whitchurch (4):
  spi: Save current RX and TX DMA devices
  spi: Fix cache corruption due to DMA/PIO overlap
  spi: Split transfers larger than max size
  spi: s3c64xx: Fix large transfers with DMA

 drivers/spi/spi-s3c64xx.c |   9 +++
 drivers/spi/spi.c         | 137 ++++++++++++++++++++++++++++----------
 include/linux/spi/spi.h   |   4 ++
 3 files changed, 114 insertions(+), 36 deletions(-)