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Commit aa15d3d2 authored Dec 11, 2017 by Alan Stern Committed by Greg Kroah-Hartman Dec 12, 2017

USB: remove the URB_NO_FSBR flag



The URB_NO_FSBR flag has never really been used.  It was introduced as
a potential way for UHCI to minimize PCI bus usage (by not attempting
full-speed bulk and control transfers more than once per frame), but
the flag was not set by any drivers.

There's no point in keeping it around.  This patch simplifies the API
by removing it.  Unfortunately, it does have to be kept as part of the
usbfs ABI, but at least we can document in
include/uapi/linux/usbdevice_fs.h that it doesn't do anything.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Shuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 4ff02f09

Documentation/usb/usbip_protocol.txt

+0 −1

Original line number	Original line	Diff line number	Diff line
	@@ -274,7 +274,6 @@ USBIP_CMD_SUBMIT: Submit an URB
	URB_SHORT_NOT_OK \| 0x00000001 \| only in \| only in \| only in \| no		URB_SHORT_NOT_OK \| 0x00000001 \| only in \| only in \| only in \| no
	URB_ISO_ASAP \| 0x00000002 \| no \| no \| no \| yes		URB_ISO_ASAP \| 0x00000002 \| no \| no \| no \| yes
	URB_NO_TRANSFER_DMA_MAP \| 0x00000004 \| yes \| yes \| yes \| yes		URB_NO_TRANSFER_DMA_MAP \| 0x00000004 \| yes \| yes \| yes \| yes
	URB_NO_FSBR \| 0x00000020 \| yes \| no \| no \| no
	URB_ZERO_PACKET \| 0x00000040 \| no \| no \| only out \| no		URB_ZERO_PACKET \| 0x00000040 \| no \| no \| only out \| no
	URB_NO_INTERRUPT \| 0x00000080 \| yes \| yes \| yes \| yes		URB_NO_INTERRUPT \| 0x00000080 \| yes \| yes \| yes \| yes
	URB_FREE_BUFFER \| 0x00000100 \| yes \| yes \| yes \| yes		URB_FREE_BUFFER \| 0x00000100 \| yes \| yes \| yes \| yes

drivers/usb/core/devio.c

+0 −2

Original line number	Original line	Diff line number	Diff line
	@@ -1677,8 +1677,6 @@ static int proc_do_submiturb(struct usb_dev_state ps, struct usbdevfs_urb uurb
	u \|= URB_ISO_ASAP;		u \|= URB_ISO_ASAP;
	if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK && is_in)		if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK && is_in)
	u \|= URB_SHORT_NOT_OK;		u \|= URB_SHORT_NOT_OK;
	if (uurb->flags & USBDEVFS_URB_NO_FSBR)
	u \|= URB_NO_FSBR;
	if (uurb->flags & USBDEVFS_URB_ZERO_PACKET)		if (uurb->flags & USBDEVFS_URB_ZERO_PACKET)
	u \|= URB_ZERO_PACKET;		u \|= URB_ZERO_PACKET;
	if (uurb->flags & USBDEVFS_URB_NO_INTERRUPT)		if (uurb->flags & USBDEVFS_URB_NO_INTERRUPT)

drivers/usb/core/urb.c

+0 −3

Original line number	Original line	Diff line number	Diff line
	@@ -479,9 +479,6 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags)
	if (is_out)		if (is_out)
	allowed \|= URB_ZERO_PACKET;		allowed \|= URB_ZERO_PACKET;
	/* FALLTHROUGH */		/* FALLTHROUGH */
	case USB_ENDPOINT_XFER_CONTROL:
	allowed \|= URB_NO_FSBR; /* only affects UHCI */
	/* FALLTHROUGH */
	default: /* all non-iso endpoints */		default: /* all non-iso endpoints */
	if (!is_out)		if (!is_out)
	allowed \|= URB_SHORT_NOT_OK;		allowed \|= URB_SHORT_NOT_OK;

drivers/usb/host/uhci-q.c

+1 −2

Original line number	Original line	Diff line number	Diff line
	@@ -73,7 +73,6 @@ static void uhci_add_fsbr(struct uhci_hcd uhci, struct urb urb)
	{		{
	struct urb_priv *urbp = urb->hcpriv;		struct urb_priv *urbp = urb->hcpriv;

	if (!(urb->transfer_flags & URB_NO_FSBR))
	urbp->fsbr = 1;		urbp->fsbr = 1;
	}		}

drivers/usb/usbip/stub_rx.c

+0 −3

Original line number	Original line	Diff line number	Diff line
	@@ -412,9 +412,6 @@ static void masking_bogus_flags(struct urb *urb)
	if (is_out)		if (is_out)
	allowed \|= URB_ZERO_PACKET;		allowed \|= URB_ZERO_PACKET;
	/* FALLTHROUGH */		/* FALLTHROUGH */
	case USB_ENDPOINT_XFER_CONTROL:
	allowed \|= URB_NO_FSBR; /* only affects UHCI */
	/* FALLTHROUGH */
	default: /* all non-iso endpoints */		default: /* all non-iso endpoints */
	if (!is_out)		if (!is_out)
	allowed \|= URB_SHORT_NOT_OK;		allowed \|= URB_SHORT_NOT_OK;

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