Messages in this thread | | | From | Neil Armstrong <> | Subject | [PATCH RFC 0/2] scatterlist: add I/O variant of sg_pcopy & sg_copy and use them | Date | Mon, 28 Jun 2021 14:34:09 +0200 |
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A local variant of sg_copy_buffer has been introduced in the meson-gx mmc driver [1] after a mempcy optimization, fixing the iomem buffer manipulation and the reported system crash [2].
But, the fix is suboptimal in terms of performace/ugliness [3] and a proper I/O variant of sg_copy_buffer should be added and used instead.
[1] https://lore.kernel.org/r/20210609150230.9291-1-narmstrong@baylibre.com [2] https://lore.kernel.org/r/acb244ad-0759-5a96-c659-5c23003d3dcd@samsung.com [3] https://lore.kernel.org/r/CAPDyKFrLSMpPJOgd5e4B1x3Vwfg4q23zgy4ESc8EmFL2MnyK7g@mail.gmail.com
Neil Armstrong (2): scatterlist: add I/O variant of sg_pcopy & sg_copy mmc: meson-gx: use sg_copy_to/from_io instead of local version
drivers/mmc/host/meson-gx-mmc.c | 53 +++----------- include/linux/scatterlist.h | 14 ++++ lib/scatterlist.c | 119 ++++++++++++++++++++++++++++++++ 3 files changed, 143 insertions(+), 43 deletions(-)
-- 2.25.1
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