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| author | Andrey Konovalov <andrey.konovalov@linaro.org> | 2012-02-17 22:00:57 +0400 |
|---|---|---|
| committer | Andrey Konovalov <andrey.konovalov@linaro.org> | 2012-02-17 22:00:57 +0400 |
| commit | 8393ea14076dbda27010fcabcff5e2d40f0bfb1f (patch) | |
| tree | a980405258207f6a0d0edfc78ae07fb652bf54e1 /drivers/usb/host/ehci.h | |
| parent | 49561d58a14351d136518f25bd686f9a6ca41b69 (diff) | |
| parent | 1a20977eb1ba05d3e1a20f1e81a830a876fdb054 (diff) | |
Merge branch 'linaro-android-3.3-agreen-rebase' into linaro-android
Diffstat (limited to 'drivers/usb/host/ehci.h')
| -rw-r--r-- | drivers/usb/host/ehci.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h index 01cefde1d49..945eacac58e 100644 --- a/drivers/usb/host/ehci.h +++ b/drivers/usb/host/ehci.h @@ -779,6 +779,23 @@ static inline unsigned ehci_read_frame_index(struct ehci_hcd *ehci) #endif +/* + * Writing to dma coherent memory on ARM may be delayed via L2 + * writing buffer, so introduce the helper which can flush L2 writing + * buffer into memory immediately, especially used to flush ehci + * descriptor to memory. + * */ +#ifdef CONFIG_ARM_DMA_MEM_BUFFERABLE +static inline void ehci_sync_mem() +{ + mb(); +} +#else +static inline void ehci_sync_mem() +{ +} +#endif + /*-------------------------------------------------------------------------*/ #ifndef DEBUG |