|To:||David Brownell <david-b@xxxxxxxxxxx>|
|Subject:||Re: e100 "Ferguson" release|
|From:||"David S. Miller" <davem@xxxxxxxxxx>|
|Date:||Sun, 3 Aug 2003 20:46:42 -0700|
|Cc:||greearb@xxxxxxxxxxxxxxx, jgarzik@xxxxxxxxx, scott.feldman@xxxxxxxxx, netdev@xxxxxxxxxxx|
|References:||<C6F5CF431189FA4CBAEC9E7DD5441E010222927D@xxxxxxxxxxxxxxxxxxxxxx> <3F2CA65F.8060105@xxxxxxxxx> <3F2CBA71.2070503@xxxxxxxxxxxxxxx> <20030803003239.4257ef24.davem@xxxxxxxxxx> <3F2DCE56.6030601@xxxxxxxxxxx> <20030803200851.7d46a605.davem@xxxxxxxxxx> <3F2DD6BD.7070504@xxxxxxxxxxx>|
On Sun, 03 Aug 2003 20:45:01 -0700 David Brownell <david-b@xxxxxxxxxxx> wrote: > What can't be pre-allocated in a reliable way is the resources > used by the host controller drivers, specifically the transfer > descriptors. EHCI and OHCI usually need one per URB, unless > MTU is over 4 KB. UHCI normally needs quite a few. Ok, that's interesting. Is there a callback that tells the USB driver that some host controller "resources" have become available? I mean, these host controllers either have to queue requests when out of resources or provide a callback so that the drivers can resubmit. Right?
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