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authorAlan Stern <stern@rowland.harvard.edu>2009-06-29 10:43:32 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2009-07-12 15:16:38 -0700
commitcb88a1b887bb8908f6e00ce29e893ea52b074940 (patch)
tree198cba7974836d994cfc839b95242e8321702d5c /drivers/usb/host/ehci-ppc-of.c
parent87ea8c887905d8b13ae90b537117592ed027632a (diff)
USB: fix the clear_tt_buffer interface
This patch (as1255) updates the interface for calling usb_hub_clear_tt_buffer(). Even the name of the function is changed! When an async URB (i.e., Control or Bulk) going through a high-speed hub to a non-high-speed device is cancelled or fails, the hub's Transaction Translator buffer may be left busy still trying to complete the transaction. The buffer has to be cleared; that's what usb_hub_clear_tt_buffer() does. It isn't safe to send any more URBs to the same endpoint until the TT buffer is fully clear. Therefore the HCD needs to be told when the Clear-TT-Buffer request has finished. This patch adds a callback method to struct hc_driver for that purpose, and makes the hub driver invoke the callback at the proper time. The patch also changes a couple of names; "hub_tt_kevent" and "tt.kevent" now look rather antiquated. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host/ehci-ppc-of.c')
0 files changed, 0 insertions, 0 deletions