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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-02-08 09:09:27 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-02-08 09:09:27 +0100 |
| commit | d8c849037d9398abe6a5f5d065eafc777eb3bdaf (patch) | |
| tree | 2ebe56d73c84619214ee9e131c586ad98b817e81 /drivers/usb/host/xhci-ring.c | |
| parent | 8cf9045b91382df9fb1eb420daa4d1c2697d2f44 (diff) | |
| parent | 92bf22614b21a2706f4993b278017e437f7785b3 (diff) | |
| download | lwn-d8c849037d9398abe6a5f5d065eafc777eb3bdaf.tar.gz lwn-d8c849037d9398abe6a5f5d065eafc777eb3bdaf.zip | |
Merge 5.11-rc7 into usb-next
We need the USB fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/xhci-ring.c')
| -rw-r--r-- | drivers/usb/host/xhci-ring.c | 31 |
1 files changed, 20 insertions, 11 deletions
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index 1c0466922523..5e548a1c93ab 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -757,11 +757,16 @@ static void xhci_unmap_td_bounce_buffer(struct xhci_hcd *xhci, dma_unmap_single(dev, seg->bounce_dma, ring->bounce_buf_len, DMA_FROM_DEVICE); /* for in tranfers we need to copy the data from bounce to sg */ - len = sg_pcopy_from_buffer(urb->sg, urb->num_sgs, seg->bounce_buf, - seg->bounce_len, seg->bounce_offs); - if (len != seg->bounce_len) - xhci_warn(xhci, "WARN Wrong bounce buffer read length: %zu != %d\n", - len, seg->bounce_len); + if (urb->num_sgs) { + len = sg_pcopy_from_buffer(urb->sg, urb->num_sgs, seg->bounce_buf, + seg->bounce_len, seg->bounce_offs); + if (len != seg->bounce_len) + xhci_warn(xhci, "WARN Wrong bounce buffer read length: %zu != %d\n", + len, seg->bounce_len); + } else { + memcpy(urb->transfer_buffer + seg->bounce_offs, seg->bounce_buf, + seg->bounce_len); + } seg->bounce_len = 0; seg->bounce_offs = 0; } @@ -3466,12 +3471,16 @@ static int xhci_align_td(struct xhci_hcd *xhci, struct urb *urb, u32 enqd_len, /* create a max max_pkt sized bounce buffer pointed to by last trb */ if (usb_urb_dir_out(urb)) { - len = sg_pcopy_to_buffer(urb->sg, urb->num_sgs, - seg->bounce_buf, new_buff_len, enqd_len); - if (len != new_buff_len) - xhci_warn(xhci, - "WARN Wrong bounce buffer write length: %zu != %d\n", - len, new_buff_len); + if (urb->num_sgs) { + len = sg_pcopy_to_buffer(urb->sg, urb->num_sgs, + seg->bounce_buf, new_buff_len, enqd_len); + if (len != new_buff_len) + xhci_warn(xhci, "WARN Wrong bounce buffer write length: %zu != %d\n", + len, new_buff_len); + } else { + memcpy(seg->bounce_buf, urb->transfer_buffer + enqd_len, new_buff_len); + } + seg->bounce_dma = dma_map_single(dev, seg->bounce_buf, max_pkt, DMA_TO_DEVICE); } else { |