The check_intr_schedule() routine in ehci-hcd looks at the wrong
microframes when checking to see if a full-speed or low-speed
interrupt endpoint will fit in the periodic schedule. If the
Start-Split transaction is scheduled for microframe N then the
Complete-Split transactions get scheduled for microframes N+2, N+3, and
N+4. However the code considers N+1, N+2, and N+3 instead.
This patch fixes the limits on the "for" loop and also improves the
use of whitespace.
Signed-off-by: Alan Stern <st...@rowland.harvard.edu>
---
[as1715]
drivers/usb/host/ehci-sched.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
Index: usb-3.11/drivers/usb/host/ehci-sched.c
===================================================================
--- usb-3.11.orig/drivers/usb/host/ehci-sched.c
+++ usb-3.11/drivers/usb/host/ehci-sched.c
@@ -761,7 +761,7 @@ static int check_intr_schedule (
unsigned i;
/* TODO : this may need FSTN for SSPLIT in uframe 5. */
- for (i=uframe+1; i<8 && i<uframe+4; i++)
+ for (i = uframe+2; i < 8 && i <= uframe+4; i++)
if (!check_period (ehci, frame, i,
qh->period, qh->c_usecs))
goto done;
--
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