diff options
| -rw-r--r-- | drivers/usb/host/ehci-sched.c | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/drivers/usb/host/ehci-sched.c b/drivers/usb/host/ehci-sched.c index 2fa1ffee5ff..c2104cad403 100644 --- a/drivers/usb/host/ehci-sched.c +++ b/drivers/usb/host/ehci-sched.c @@ -637,9 +637,8 @@ iso_stream_alloc (int mem_flags) { struct ehci_iso_stream *stream; - stream = kmalloc(sizeof *stream, mem_flags); + stream = kcalloc(1, sizeof *stream, mem_flags); if (likely (stream != NULL)) { - memset (stream, 0, sizeof(*stream)); INIT_LIST_HEAD(&stream->td_list); INIT_LIST_HEAD(&stream->free_list); stream->next_uframe = -1; @@ -894,7 +893,7 @@ itd_sched_init ( trans |= length << 16; uframe->transaction = cpu_to_le32 (trans); - /* might need to cross a buffer page within a td */ + /* might need to cross a buffer page within a uframe */ uframe->bufp = (buf & ~(u64)0x0fff); buf += length; if (unlikely ((uframe->bufp != (buf & ~(u64)0x0fff)))) @@ -1194,6 +1193,7 @@ itd_init (struct ehci_iso_stream *stream, struct ehci_itd *itd) { int i; + /* it's been recently zeroed */ itd->hw_next = EHCI_LIST_END; itd->hw_bufp [0] = stream->buf0; itd->hw_bufp [1] = stream->buf1; @@ -1210,8 +1210,7 @@ itd_patch ( struct ehci_itd *itd, struct ehci_iso_sched *iso_sched, unsigned index, - u16 uframe, - int first + u16 uframe ) { struct ehci_iso_packet *uf = &iso_sched->packet [index]; @@ -1228,7 +1227,7 @@ itd_patch ( itd->hw_bufp_hi [pg] |= cpu_to_le32 ((u32)(uf->bufp >> 32)); /* iso_frame_desc[].offset must be strictly increasing */ - if (unlikely (!first && uf->cross)) { + if (unlikely (uf->cross)) { u64 bufp = uf->bufp + 4096; itd->pg = ++pg; itd->hw_bufp [pg] |= cpu_to_le32 (bufp & ~(u32)0); @@ -1257,7 +1256,7 @@ itd_link_urb ( struct ehci_iso_stream *stream ) { - int packet, first = 1; + int packet; unsigned next_uframe, uframe, frame; struct ehci_iso_sched *iso_sched = urb->hcpriv; struct ehci_itd *itd; @@ -1290,7 +1289,6 @@ itd_link_urb ( list_move_tail (&itd->itd_list, &stream->td_list); itd->stream = iso_stream_get (stream); itd->urb = usb_get_urb (urb); - first = 1; itd_init (stream, itd); } @@ -1298,8 +1296,7 @@ itd_link_urb ( frame = next_uframe >> 3; itd->usecs [uframe] = stream->usecs; - itd_patch (itd, iso_sched, packet, uframe, first); - first = 0; + itd_patch (itd, iso_sched, packet, uframe); next_uframe += stream->interval; stream->depth += stream->interval; |