From: Andy Shevchenko <andriy.shevchenko-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
To: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: Andy Shevchenko
<andriy.shevchenko-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
Subject: [PATCH v1 0/2] spi: dw-mid: fix simplex DMA transfers
Date: Tue, 28 Oct 2014 18:25:00 +0200 [thread overview]
Message-ID: <1414513502-595-1-git-send-email-andriy.shevchenko@linux.intel.com> (raw)
In current shape the driver relies on both TX and RX transfers when DMA is
enabled. In case of simplex transfer the driver will stuck, since call back
function will never achieve the proper condition to finish the transfer.
This patchset fixes the potential issue.
Andy Shevchenko (2):
spi: dw-mid: refactor to use helpers
spi: dw-mid: split rx and tx callbacks when DMA
drivers/spi/spi-dw-mid.c | 114 ++++++++++++++++++++++++++++++++++-------------
drivers/spi/spi-dw.h | 2 +-
2 files changed, 84 insertions(+), 32 deletions(-)
--
2.1.1
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next reply other threads:[~2014-10-28 16:25 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-28 16:25 Andy Shevchenko [this message]
[not found] ` <1414513502-595-1-git-send-email-andriy.shevchenko-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2014-10-28 16:25 ` [PATCH v1 1/2] spi: dw-mid: refactor to use helpers Andy Shevchenko
2014-10-28 16:25 ` [PATCH v1 2/2] spi: dw-mid: split rx and tx callbacks when DMA Andy Shevchenko
2014-10-28 22:41 ` [PATCH v1 0/2] spi: dw-mid: fix simplex DMA transfers Mark Brown
[not found] ` <20141028224156.GN18557-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2014-10-29 10:37 ` Andy Shevchenko
[not found] ` <1414579076.2396.62.camel-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2014-10-29 11:17 ` Mark Brown
[not found] ` <20141029111712.GE18557-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2014-10-29 13:20 ` Andy Shevchenko
[not found] ` <1414588848.2396.64.camel-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2014-10-29 22:15 ` Mark Brown
[not found] ` <20141029221530.GQ18557-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2014-10-30 7:10 ` Andy Shevchenko
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