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usbmon: Drop DMA mapping for setup packet
Setup packet must be visible in virtual space. There's absolutely no good reason to implement any kind of zero-copy transfer of 8 bytes, and the documentation in usb.h is explicit about it. So, drop DMA remapping. Signed-off-by: Pete Zaitcev <zaitcev@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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2 changed files with 0 additions and 8 deletions
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@ -361,10 +361,6 @@ static inline char mon_bin_get_setup(unsigned char *setupb,
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if (!usb_endpoint_xfer_control(&urb->ep->desc) || ev_type != 'S')
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return '-';
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if (urb->dev->bus->uses_dma &&
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(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) {
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return mon_dmapeek(setupb, urb->setup_dma, SETUP_LEN);
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}
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if (urb->setup_packet == NULL)
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return 'Z';
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@ -127,10 +127,6 @@ static inline char mon_text_get_setup(struct mon_event_text *ep,
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if (ep->xfertype != USB_ENDPOINT_XFER_CONTROL || ev_type != 'S')
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return '-';
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if (urb->dev->bus->uses_dma &&
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(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) {
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return mon_dmapeek(ep->setup, urb->setup_dma, SETUP_MAX);
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}
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if (urb->setup_packet == NULL)
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return 'Z'; /* '0' would be not as pretty. */
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