diff options
Diffstat (limited to 'drivers/isdn/hisax/hfc4s8s_l1.c')
| -rw-r--r-- | drivers/isdn/hisax/hfc4s8s_l1.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/isdn/hisax/hfc4s8s_l1.c b/drivers/isdn/hisax/hfc4s8s_l1.c index 0e5d673871c0..9600cd771f1a 100644 --- a/drivers/isdn/hisax/hfc4s8s_l1.c +++ b/drivers/isdn/hisax/hfc4s8s_l1.c @@ -646,14 +646,14 @@ rx_d_frame(struct hfc4s8s_l1 *l1p, int ech) f1 = Read_hfc8_stable(l1p->hw, A_F1); f2 = Read_hfc8(l1p->hw, A_F2); - df = f1 - f2; - if ((f1 - f2) < 0) - df = f1 - f2 + MAX_F_CNT + 1; + if (f1 < f2) + df = MAX_F_CNT + 1 + f1 - f2; + else + df = f1 - f2; - if (!df) { + if (!df) return; /* no complete frame in fifo */ - } z1 = Read_hfc16_stable(l1p->hw, A_Z1); z2 = Read_hfc16(l1p->hw, A_Z2); |