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authorDaniel Borkmann <dborkman@redhat.com>2013-04-06 10:40:52 +0200
committerDaniel Borkmann <dborkman@redhat.com>2013-04-06 10:40:52 +0200
commit2a97f075c9f05b09b03a2ab75f6c68d5ad3709aa (patch)
tree18735e54a03de318d0cf2074b62818a8a872e61c /Documentation/SubmittingPatches
parent076f7de55d58e66d21d2e57327ee515d6e7d03a9 (diff)
man: man page updates for bpfc, curvetun
These are the writings so far. For sure they are not yet finished, so I will push updates for both of them as soon as possible, but for now this is a first version people can start to read. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2025-02-13 11:25:06 +0000
rt for cppi41, but had corner case issues. Some of the issues were fixed with commit 098de42ad670 ("dmaengine: cppi41: Fix unpaired pm runtime when only a USB hub is connected"). That fix however caused a new regression where we can get error -115 messages with USB on BeagleBone when connecting a USB mass storage device to a hub. This is because when connecting a USB mass storage device to a hub, the initial DMA transfers can take over 200ms to complete and cppi41 autosuspend delay times out. To fix the issue, we want to implement refcounting for chan_busy array that contains the active dma transfers. Increasing the autosuspend delay won't help as that the delay could be potentially seconds, and it's best to let the USB subsystem to deal with the timeouts on errors. The earlier attempt for runtime PM was buggy as the pm_runtime_get/put() calls could get unpaired easily as they did not follow the state of the chan_busy array as described in commit 098de42ad670 ("dmaengine: cppi41: Fix unpaired pm runtime when only a USB hub is connected". Let's fix the issue by adding pm_runtime_get() to where a new transfer is added to the chan_busy array, and calls to pm_runtime_put() where chan_busy array entry is cleared. This prevents any autosuspend timeouts from happening while dma transfers are active. Fixes: 098de42ad670 ("dmaengine: cppi41: Fix unpaired pm runtime when only a USB hub is connected") Fixes: fdea2d09b997 ("dmaengine: cppi41: Add basic PM runtime support") Cc: Andy Shevchenko <andy.shevchenko@gmail.com> Cc: Bin Liu <b-liu@ti.com> Cc: Grygorii Strashko <grygorii.strashko@ti.com> Cc: Kevin Hilman <khilman@baylibre.com> Cc: Patrick Titiano <ptitiano@baylibre.com> Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Tested-by: Bin Liu <b-liu@ti.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'include/dt-bindings/mfd/atmel-flexcom.h')