On Fri, Jan 22, 2016 at 02:12:02PM +0100, Jean Delvare wrote: > We need a single mutex for all 4 shared SMBus ports on the SB800. A > per-port mutex doesn't protect us from concurrent access. > > In theory the mutex should be per PCI device, however in practice we > know that there's only ever a single instance of the device in a given > system so we can use a global. > > Also take the mutex during initialization, as first port may be already > in use when second port is initialized. > > Signed-off-by: Jean Delvare <jdelvare@xxxxxxx> > Cc: Christian Fetzer <fetzer.ch@xxxxxxxxx> > Cc: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx> > Cc: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> > Cc: Wolfram Sang <wsa@xxxxxxxxxxxxx> Fixed a sparse warning by making the mutex static, took the freedom to read Christian's mail as Tested-by and applied to for-current, thanks!
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