diff options
Diffstat (limited to 'drivers/usb/host/ehci-hcd.c')
| -rw-r--r-- | drivers/usb/host/ehci-hcd.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c index 2e704fa3cedf..34a928d3b7d2 100644 --- a/drivers/usb/host/ehci-hcd.c +++ b/drivers/usb/host/ehci-hcd.c @@ -79,7 +79,13 @@ static const char hcd_name [] = "ehci_hcd"; #define EHCI_TUNE_RL_TT 0 #define EHCI_TUNE_MULT_HS 1 /* 1-3 transactions/uframe; 4.10.3 */ #define EHCI_TUNE_MULT_TT 1 -#define EHCI_TUNE_FLS 2 /* (small) 256 frame schedule */ +/* + * Some drivers think it's safe to schedule isochronous transfers more than + * 256 ms into the future (partly as a result of an old bug in the scheduling + * code). In an attempt to avoid trouble, we will use a minimum scheduling + * length of 512 frames instead of 256. + */ +#define EHCI_TUNE_FLS 1 /* (medium) 512-frame schedule */ #define EHCI_IAA_MSECS 10 /* arbitrary */ #define EHCI_IO_JIFFIES (HZ/10) /* io watchdog > irq_thresh */ |
