• Alek Du's avatar
    USB: EHCI: split ehci_qh into hw and sw parts · 3807e26d
    Alek Du authored
    The ehci_qh structure merged hw and sw together which is not good:
    1. More and more items are being added into ehci_qh, the ehci_qh software
       part are unnecessary to be allocated in DMA qh_pool.
    2. If HCD has local SRAM, the sw part will consume it too, and it won't
       bring any benefit.
    3. For non-cache-coherence system, the entire ehci_qh is uncachable, actually
       we only need the hw part to be uncacheable. Spliting them will let the sw
       part to be cacheable.
    Signed-off-by: default avatarAlek Du <alek.du@intel.com>
    Cc: David Brownell <dbrownell@users.sourceforge.net>
    CC: Alan Stern <stern@rowland.harvard.edu>
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
    3807e26d
ehci-mem.c 6.24 KB