From: Pete Zaitcev Date: Tue, 14 Aug 2007 07:37:51 +0000 (-0700) Subject: usbmon: Drop DMA mapping for setup packet X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=cdd5a8fd24f5be43417a25c6feb8e7ebdce63098;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git 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 Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/mon/mon_bin.c b/drivers/usb/mon/mon_bin.c index 5185e93dedef..3d6f03819ffd 100644 --- a/drivers/usb/mon/mon_bin.c +++ b/drivers/usb/mon/mon_bin.c @@ -361,10 +361,6 @@ static inline char mon_bin_get_setup(unsigned char *setupb, if (!usb_endpoint_xfer_control(&urb->ep->desc) || ev_type != 'S') return '-'; - if (urb->dev->bus->uses_dma && - (urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) { - return mon_dmapeek(setupb, urb->setup_dma, SETUP_LEN); - } if (urb->setup_packet == NULL) return 'Z'; diff --git a/drivers/usb/mon/mon_text.c b/drivers/usb/mon/mon_text.c index a74069c2e82b..663a702a17dd 100644 --- a/drivers/usb/mon/mon_text.c +++ b/drivers/usb/mon/mon_text.c @@ -127,10 +127,6 @@ static inline char mon_text_get_setup(struct mon_event_text *ep, if (ep->xfertype != USB_ENDPOINT_XFER_CONTROL || ev_type != 'S') return '-'; - if (urb->dev->bus->uses_dma && - (urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) { - return mon_dmapeek(ep->setup, urb->setup_dma, SETUP_MAX); - } if (urb->setup_packet == NULL) return 'Z'; /* '0' would be not as pretty. */