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authorMike Nuss <mike@terascala.com>2007-08-01 16:24:30 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2007-10-12 17:54:59 -0400
commit89a0fd18a96eb1f8732714b575073f8a8d69c009 (patch)
tree166d14fc49ad7fd646e1e7aa7decf6b3bea6d381 /drivers/usb/host/ohci-mem.c
parente8fa0ce65c58dbb60be279c4e33534650dcacc31 (diff)
USB: OHCI handles more ZFMicro quirks
The ZF Micro OHCI controller exhibits unexpected behavior that seems to be related to high load. Under certain conditions, the controller will complete a TD, remove it from the endpoint's queue, and fail to add it to the donelist. This causes the endpoint to appear to stop responding. Worse, if the device is removed while in that state, OHCI will hang while waiting for the orphaned TD to complete. The situation is not recoverable without rebooting. This fix enhances the scope of the existing OHCI_QUIRK_ZFMICRO flag: 1. A watchdog routine periodically scans the OHCI structures to check for orphaned TDs. In these cases the TD is taken back from the controller and completed normally. 2. If a device is removed while the endpoint is hung but before the watchdog catches the situation, any outstanding TDs are taken back from the controller in the 'sanitize' phase. The ohci-hcd driver used to print "INTR_SF lossage" in this situation; this changes it to the universally accurate "ED unlink timeout". Other instances of this message presumably have different root causes. Both this Compaq quirk and a NEC quirk are now properly compiled out for non-PCI builds of this driver. Signed-off-by: Mike Nuss <mike@terascala.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host/ohci-mem.c')
-rw-r--r--drivers/usb/host/ohci-mem.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/usb/host/ohci-mem.c b/drivers/usb/host/ohci-mem.c
index 450c7b460c5a..2f20d3dc895b 100644
--- a/drivers/usb/host/ohci-mem.c
+++ b/drivers/usb/host/ohci-mem.c
@@ -28,7 +28,6 @@ static void ohci_hcd_init (struct ohci_hcd *ohci)
28 ohci->next_statechange = jiffies; 28 ohci->next_statechange = jiffies;
29 spin_lock_init (&ohci->lock); 29 spin_lock_init (&ohci->lock);
30 INIT_LIST_HEAD (&ohci->pending); 30 INIT_LIST_HEAD (&ohci->pending);
31 INIT_WORK (&ohci->nec_work, ohci_quirk_nec_worker);
32} 31}
33 32
34/*-------------------------------------------------------------------------*/ 33/*-------------------------------------------------------------------------*/