diff options
| author | David Brownell <david-b@pacbell.net> | 2005-09-22 00:49:07 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-09-22 07:58:25 -0700 |
| commit | 4b2e790a4d73d729d936cc42f3b08af34f8ea5c6 (patch) | |
| tree | d052c4c7d260b0eeb3e83376f7f4eb952e1cfd60 /drivers/usb | |
| parent | 2ba08e825e5a666f540bff15e9977725675e8de6 (diff) | |
| download | blackbird-op-linux-4b2e790a4d73d729d936cc42f3b08af34f8ea5c6.tar.gz blackbird-op-linux-4b2e790a4d73d729d936cc42f3b08af34f8ea5c6.zip | |
[PATCH] USB: sl811-hcd minor fixes
Three minor sl811-hcd fixes:
- Elminate memory leak on one (rare) disable/shutdown path.
- For periodic transfers that don't need to be scheduled, update
urb->start_frame to represent the transfer phase correctly.
- Report the (single) port as removable, by default.
Since no drivers yet use start_frame or that part of the hub descriptor,
only that leak is likely to ever matter.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
drivers/usb/host/sl811-hcd.c | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/host/sl811-hcd.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/usb/host/sl811-hcd.c b/drivers/usb/host/sl811-hcd.c index d2a1fd40dfcb..d42a15d10a46 100644 --- a/drivers/usb/host/sl811-hcd.c +++ b/drivers/usb/host/sl811-hcd.c @@ -782,6 +782,9 @@ retry: /* usb 1.1 says max 90% of a frame is available for periodic transfers. * this driver doesn't promise that much since it's got to handle an * IRQ per packet; irq handling latencies also use up that time. + * + * NOTE: the periodic schedule is a sparse tree, with the load for + * each branch minimized. see fig 3.5 in the OHCI spec for example. */ #define MAX_PERIODIC_LOAD 500 /* out of 1000 usec */ @@ -843,6 +846,7 @@ static int sl811h_urb_enqueue( if (!(sl811->port1 & (1 << USB_PORT_FEAT_ENABLE)) || !HC_IS_RUNNING(hcd->state)) { retval = -ENODEV; + kfree(ep); goto fail; } @@ -911,8 +915,16 @@ static int sl811h_urb_enqueue( case PIPE_ISOCHRONOUS: case PIPE_INTERRUPT: urb->interval = ep->period; - if (ep->branch < PERIODIC_SIZE) + if (ep->branch < PERIODIC_SIZE) { + /* NOTE: the phase is correct here, but the value + * needs offsetting by the transfer queue depth. + * All current drivers ignore start_frame, so this + * is unlikely to ever matter... + */ + urb->start_frame = (sl811->frame & (PERIODIC_SIZE - 1)) + + ep->branch; break; + } retval = balance(sl811, ep->period, ep->load); if (retval < 0) @@ -1122,7 +1134,7 @@ sl811h_hub_descriptor ( desc->wHubCharacteristics = (__force __u16)cpu_to_le16(temp); /* two bitmaps: ports removable, and legacy PortPwrCtrlMask */ - desc->bitmap[0] = 1 << 1; + desc->bitmap[0] = 0 << 1; desc->bitmap[1] = ~0; } |
