USB: ehci: minor ISO updates, always support split ISO

Small updates to the EHCI driver's ISO support:

 - Get rid of the Kconfig option for full speed ISO.  It may
   not be perfect yet, but it hasn't appeared to be dangerous
   and pretty much every configuration wants it.

 - Instead of two places to disable an empty periodic schedule
   after an ISO transfer completes, just have one.

 - After the periodic schedule is disabled, we can short-circuit
   the schedule scan ... it can't possibly have more work to do.

Assuming a typical config with split iso enabled, the only change
in behavior should be almost unobservable:  quicker termination
of periodic scans when the schedule gets emptied.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 0 insertions, 9 deletions

diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 3a42bcd27d30..d97b16b52efa 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -29,15 +29,6 @@ config USB_EHCI_HCD
           To compile this driver as a module, choose M here: the
           module will be called ehci-hcd.
 
-config USB_EHCI_SPLIT_ISO
-        bool "Full speed ISO transactions (EXPERIMENTAL)"
-        depends on USB_EHCI_HCD && EXPERIMENTAL
-        default n
-        ---help---
-          This code is new and hasn't been used with many different
-          EHCI or USB 2.0 transaction translator implementations.
-          It should work for ISO-OUT transfers, like audio.
-
 config USB_EHCI_ROOT_HUB_TT
         bool "Root Hub Transaction Translators (EXPERIMENTAL)"
         depends on USB_EHCI_HCD && EXPERIMENTAL