dmaengine: add a release for dma class devices and dependent infrastructure
authorDan Williams <dan.j.williams@intel.com>
Tue, 6 Jan 2009 18:38:21 +0000 (11:38 -0700)
committerDan Williams <dan.j.williams@intel.com>
Tue, 6 Jan 2009 18:38:21 +0000 (11:38 -0700)
commit41d5e59c1299f27983977bcfe3b360600996051c
treef0e80b6fea3af04f266843af97f433198ad535c7
parent4fac7fa57cf8001be259688468c825f836daf739
dmaengine: add a release for dma class devices and dependent infrastructure

Resolves:
WARNING: at drivers/base/core.c:122 device_release+0x4d/0x52()
Device 'dma0chan0' does not have a release() function, it is broken and must be fixed.

The dma_chan_dev object is introduced to gear-match sysfs kobject and
dmaengine channel lifetimes.  When a channel is removed access to the
sysfs entries return -ENODEV until the kobject can be released.

The bulk of the change is updates to existing code to handle the extra
layer of indirection between a dma_chan and its struct device.

Reported-by: Alexander Beregalov <a.beregalov@gmail.com>
Acked-by: Stephen Hemminger <shemminger@vyatta.com>
Cc: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
drivers/dma/dmaengine.c
drivers/dma/dmatest.c
drivers/dma/dw_dmac.c
drivers/dma/fsldma.c
include/linux/dmaengine.h