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| author | David Brownell | 2009-04-13 23:39:57 +0200 |
|---|---|---|
| committer | Linus Torvalds | 2009-04-14 00:04:30 +0200 |
| commit | bdff549ebeff92b1a6952e5501caf16a6f8898c8 (patch) | |
| tree | 3cebe8c0f7b26433e42832a6feb50fd6e4de75b7 /Documentation/cgroups/resource_counter.txt | |
| parent | asm-generic/siginfo.h: update NSIGTRAP definition (diff) | |
| download | kernel-qcow2-linux-bdff549ebeff92b1a6952e5501caf16a6f8898c8.tar.gz kernel-qcow2-linux-bdff549ebeff92b1a6952e5501caf16a6f8898c8.tar.xz kernel-qcow2-linux-bdff549ebeff92b1a6952e5501caf16a6f8898c8.zip | |
spi: spi_write_then_read() bugfixes
The "simplify spi_write_then_read()" patch included two regressions from
the 2.6.27 behaviors:
- The data it wrote out during the (full duplex) read side
of the transfer was not zeroed.
- It fails completely on half duplex hardware, such as
Microwire and most "3-wire" SPI variants.
So, revert that patch. A revised version should be submitted at some
point, which can get the speedup on standard hardware (full duplex)
without breaking on less-capable half-duplex stuff.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: <stable@kernel.org> [2.6.28.x, 2.6.29.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/cgroups/resource_counter.txt')
0 files changed, 0 insertions, 0 deletions