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authorRobert Jarzmik <robert.jarzmik@free.fr>2012-03-23 00:00:53 +0400
committerDavid Woodhouse <David.Woodhouse@intel.com>2012-03-27 04:03:27 +0400
commit7b0e67f604e1829e5292e1ad7743eb18dc42ea7c (patch)
tree48cb065f253ed6552e8e5805bba7647eb25a8ad7 /drivers/dma/mxs-dma.c
parent1b15a5f93bbd9a6f5346cfa449720a7e32115f86 (diff)
downloadlinux-7b0e67f604e1829e5292e1ad7743eb18dc42ea7c.tar.xz
mtd: docg3 add protection against concurrency
As docg3 is intolerant against reentrancy, especially because of its weird register access (ie. a register read is performed by a first register write), each access to the docg3 IO space must be locked. Lock the IO space with a mutex, shared by all chips on the same cascade, as they all share the same IO space. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/dma/mxs-dma.c')
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