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| author | Chris Bainbridge <chris.bainbridge@gmail.com> | 2015-04-29 21:21:40 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-04-30 23:18:11 +0200 |
| commit | 3349fb64b2927407017d970dd5c4daf3c5ad69f8 (patch) | |
| tree | 7f446e4537f411daa245f1b0a16ec628a76442d1 /lib/find_last_bit.c | |
| parent | 61f8ff693923e4b19748b0e8287b99778f2661c7 (diff) | |
ACPI / SBS: Add 5 us delay to fix SBS hangs on MacBook
Commit 7bc5a2bad0b8 'ACPI: Support _OSI("Darwin") correctly' caused
the MacBook firmware to expose the SBS, resulting in intermittent
hangs of several minutes on boot, and failure to detect or report
the battery. Fix this by adding a 5 us delay to the start of each
SMBUS transaction. This timing is the result of experimentation -
hangs were observed with 3 us but never with 5 us.
Fixes: 7bc5a2bad0b8 'ACPI: Support _OSI("Darwin") correctly'
Link: https://bugzilla.kernel.org/show_bug.cgi?id=94651
Signed-off-by: Chris Bainbridge <chris.bainbridge@gmail.com>
Cc: 3.18+ <stable@vger.kernel.org> # 3.18+
[ rjw: Subject and changelog ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'lib/find_last_bit.c')
0 files changed, 0 insertions, 0 deletions