1 files changed, 7 insertions, 10 deletions

diff --git a/drivers/usb/host/ehci-sched.c b/drivers/usb/host/ehci-sched.c
index 6c9fbe352f73..2abf8543f083 100644
--- a/drivers/usb/host/ehci-sched.c
+++ b/drivers/usb/host/ehci-sched.c
@@ -172,7 +172,7 @@ periodic_usecs (struct ehci_hcd *ehci, unsigned frame, unsigned uframe)
                 }
         }
 #ifdef  DEBUG
-        if (usecs > 100)
+        if (usecs > ehci->uframe_periodic_max)
                 ehci_err (ehci, "uframe %d sched overrun: %d usecs\n",
                         frame * 8 + uframe, usecs);
 #endif
@@ -709,11 +709,8 @@ static int check_period (
         if (uframe >= 8)
                 return 0;
 
-        /*
-         * 80% periodic == 100 usec/uframe available
-         * convert "usecs we need" to "max already claimed"
-         */
-        usecs = 100 - usecs;
+        /* convert "usecs we need" to "max already claimed" */
+        usecs = ehci->uframe_periodic_max - usecs;
 
         /* we "know" 2 and 4 uframe intervals were rejected; so
          * for period 0, check _every_ microframe in the schedule.
@@ -1286,9 +1283,9 @@ itd_slot_ok (
 {
         uframe %= period;
         do {
-                /* can't commit more than 80% periodic == 100 usec */
+                /* can't commit more than uframe_periodic_max usec */
                 if (periodic_usecs (ehci, uframe >> 3, uframe & 0x7)
-                                > (100 - usecs))
+                                > (ehci->uframe_periodic_max - usecs))
                         return 0;
 
                 /* we know urb->interval is 2^N uframes */
@@ -1345,7 +1342,7 @@ sitd_slot_ok (
 #endif
 
                 /* check starts (OUT uses more than one) */
-                max_used = 100 - stream->usecs;
+                max_used = ehci->uframe_periodic_max - stream->usecs;
                 for (tmp = stream->raw_mask & 0xff; tmp; tmp >>= 1, uf++) {
                         if (periodic_usecs (ehci, frame, uf) > max_used)
                                 return 0;
@@ -1354,7 +1351,7 @@ sitd_slot_ok (
                 /* for IN, check CSPLIT */
                 if (stream->c_usecs) {
                         uf = uframe & 7;
-                        max_used = 100 - stream->c_usecs;
+                        max_used = ehci->uframe_periodic_max - stream->c_usecs;
                         do {
                                 tmp = 1 << uf;
                                 tmp <<= 8;