diff options
| -rw-r--r-- | sys/dev/usb/usb_busdma.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/sys/dev/usb/usb_busdma.c b/sys/dev/usb/usb_busdma.c index e7e2f6a..e536793 100644 --- a/sys/dev/usb/usb_busdma.c +++ b/sys/dev/usb/usb_busdma.c @@ -474,9 +474,13 @@ usb_pc_common_mem_cb(void *arg, bus_dma_segment_t *segs, pc->page_offset_buf = rem; pc->page_offset_end += rem; #ifdef USB_DEBUG - if (rem != (USB_P2U(pc->buffer) & (USB_PAGE_SIZE - 1))) { + if (nseg > 1 && + ((segs->ds_addr + segs->ds_len) & (USB_PAGE_SIZE - 1)) != + ((segs + 1)->ds_addr & (USB_PAGE_SIZE - 1))) { /* - * This check verifies that the physical address is correct: + * This check verifies there is no page offset hole + * between the first and second segment. See the + * BUS_DMA_KEEP_PG_OFFSET flag. */ DPRINTFN(0, "Page offset was not preserved\n"); error = 1; |
