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| author | Mathias Nyman <mathias.nyman@linux.intel.com> | 2021-01-29 16:00:18 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-01-29 16:16:49 +0300 |
| commit | ab58f3bb6aaaf98ba81d5c627ac25c08ff4ed4f1 (patch) | |
| tree | a041ed17950fe2fd3bee2e58db1d930fd0934e95 /drivers/usb/host/xhci.h | |
| parent | 1a9e38cabd80356ffb98c2c88fec528ea9644fd5 (diff) | |
| download | linux-ab58f3bb6aaaf98ba81d5c627ac25c08ff4ed4f1.tar.xz | |
xhci: Avoid parsing transfer events several times
When handling transfer events the event is passed along the handling
callpath and parsed again in several occasions.
The event contains slot_id and endpoint index, from which the driver
endpoint structure can be found. There wasn't however a way to get the
endpoint index or parent usb device from this endpoint structure.
A lot of extra event parsing, and thus some DMA doublefetch cases,
and excess variables and code can be avoided by adding endpoint index
and parent usb virt device pointer to the endpoint structure.
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20210129130044.206855-2-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/xhci.h')
| -rw-r--r-- | drivers/usb/host/xhci.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 25e57bc9c3cc..c76381f341ff 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -918,6 +918,8 @@ struct xhci_bw_info { #define SS_BW_RESERVED 10 struct xhci_virt_ep { + struct xhci_virt_device *vdev; /* parent */ + unsigned int ep_index; struct xhci_ring *ring; /* Related to endpoints that are configured to use stream IDs only */ struct xhci_stream_info *stream_info; |