| commit | e58dcebcd83b5902411e747ee7807219dee6bcf2 | |
| author | Alan Stern <stern@rowland.harvard.edu> | |
| Thu, 25 Sep 2008 20:59:57 +0000 (25 16:59 -0400) | ||
| committer | Greg Kroah-Hartman <gregkh@suse.de> | |
| Fri, 17 Oct 2008 21:41:01 +0000 (17 14:41 -0700) | ||
| tree | 2d37312f1514ad992698f642a8e567c1ffc9c359 | treesnapshot (tar.gz zip) |
| parent | 925dff5dee04fb46d2e67c088c54b331f97672ee | commitdiff |
USB: UHCI: improve scheduling of interrupt URBs
This patch (as1140) adds a little intelligence to the interrupt-URB
scheduler in uhci-hcd. Right now the scheduler is stupid; every URB
having the same period is assigned to the same slot. Thus a large
group of period-N URBs can fill their slot and cause -ENOSPC errors
even when all the lower-period slots are empty.
With the patch, if an URB doesn't fit in its assigned slot then the
scheduler will try using lower-period slots. This will provide
greater flexibility. As an example, the driver will be able to handle
more than just three or four mice, which the current driver cannot.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch (as1140) adds a little intelligence to the interrupt-URB
scheduler in uhci-hcd. Right now the scheduler is stupid; every URB
having the same period is assigned to the same slot. Thus a large
group of period-N URBs can fill their slot and cause -ENOSPC errors
even when all the lower-period slots are empty.
With the patch, if an URB doesn't fit in its assigned slot then the
scheduler will try using lower-period slots. This will provide
greater flexibility. As an example, the driver will be able to handle
more than just three or four mice, which the current driver cannot.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| drivers/usb/host/uhci-q.c | diffblobblamehistory |