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[PATCH 4.10 30/48] usb: gadget: function: f_fs: pass companion descriptor along

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4.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Felipe Balbi <felipe.balbi@linux.intel.com>

commit 2bfa0719ac2a9b2f3c91345873d3cdebd0296ba9 upstream.

If we're dealing with SuperSpeed endpoints, we need
to make sure to pass along the companion descriptor
and initialize fields needed by the Gadget
API. Eventually, f_fs.c should be converted to use
config_ep_by_speed() like all other functions,
though.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/usb/gadget/function/f_fs.c |   15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

--- a/drivers/usb/gadget/function/f_fs.c
+++ b/drivers/usb/gadget/function/f_fs.c
@@ -1833,11 +1833,14 @@ static int ffs_func_eps_enable(struct ff
 	spin_lock_irqsave(&func->ffs->eps_lock, flags);
 	while(count--) {
 		struct usb_endpoint_descriptor *ds;
+		struct usb_ss_ep_comp_descriptor *comp_desc = NULL;
+		int needs_comp_desc = false;
 		int desc_idx;
 
-		if (ffs->gadget->speed == USB_SPEED_SUPER)
+		if (ffs->gadget->speed == USB_SPEED_SUPER) {
 			desc_idx = 2;
-		else if (ffs->gadget->speed == USB_SPEED_HIGH)
+			needs_comp_desc = true;
+		} else if (ffs->gadget->speed == USB_SPEED_HIGH)
 			desc_idx = 1;
 		else
 			desc_idx = 0;
@@ -1854,6 +1857,14 @@ static int ffs_func_eps_enable(struct ff
 
 		ep->ep->driver_data = ep;
 		ep->ep->desc = ds;
+
+		comp_desc = (struct usb_ss_ep_comp_descriptor *)(ds +
+				USB_DT_ENDPOINT_SIZE);
+		ep->ep->maxburst = comp_desc->bMaxBurst + 1;
+
+		if (needs_comp_desc)
+			ep->ep->comp_desc = comp_desc;
+
 		ret = usb_ep_enable(ep->ep);
 		if (likely(!ret)) {
 			epfile->ep = ep;

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[PATCH 4.10 00/48] 4.10.4-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 15:40 +0100
  [PATCH 4.10 23/48] powerpc/booke: Fix boot crash due to null hugepd Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 15:40 +0100
  [PATCH 4.10 21/48] i2c: add missing of_node_put in i2c_mux_del_adapters Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 15:40 +0100
  [PATCH 4.10 17/48] tracing: Add #undef to fix compile error Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 15:40 +0100
  [PATCH 4.10 41/48] KVM: s390: Fix guest migration for huge guests resulting in panic Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 15:40 +0100
  [PATCH 4.10 36/48] USB: iowarrior: fix NULL-deref at probe Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 15:40 +0100
  [PATCH 4.10 39/48] USB: serial: io_ti: fix information leak in completion handler Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 15:40 +0100
  [PATCH 4.10 30/48] usb: gadget: function: f_fs: pass companion descriptor along Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 15:40 +0100
  [PATCH 4.10 19/48] efi/arm: Fix boot crash with CONFIG_CPUMASK_OFFSTACK=y Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 15:40 +0100
  [PATCH 4.10 04/48] USB: serial: digi_acceleport: fix OOB-event processing Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 15:40 +0100
  [PATCH 4.10 07/48] MIPS: VDSO: avoid duplicate CAC_BASE definition Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 15:40 +0100
  [PATCH 4.10 29/48] usb: ohci-at91: Do not drop unhandled USB suspend control requests Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 15:40 +0100
  [PATCH 4.10 15/48] MIPS: ralink: Remove unused rt*_wdt_reset functions Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 15:40 +0100
  [PATCH 4.10 47/48] ext4: dont BUG when truncating encrypted inodes on the orphan list Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 15:40 +0100
  [PATCH 4.10 44/48] [media] serial_ir: ensure were ready to receive interrupts Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 15:50 +0100
  [PATCH 4.10 28/48] usb: dwc3-omap: Fix missing break in dwc3_omap_set_mailbox() Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 15:50 +0100
  [PATCH 4.10 35/48] USB: serial: omninet: fix reference leaks at open Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 15:50 +0100
  [PATCH 4.10 38/48] USB: serial: io_ti: fix NULL-deref in interrupt callback Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 15:50 +0100
  [PATCH 4.10 08/48] MIPS: ip27: Disable qlge driver in defconfig Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 15:50 +0100
  [PATCH 4.10 42/48] KVM: arm/arm64: Let vcpu thread modify its own active state Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 15:50 +0100
  [PATCH 4.10 45/48] dm: flush queued bios when process blocks to avoid deadlock Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 15:50 +0100
  [PATCH 4.10 43/48] drm/i915/gvt: Fix superfluous newline in GVT_DISPLAY_READY env var Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 15:50 +0100
  [PATCH 4.10 06/48] MIPS: Update defconfigs for NF_CT_PROTO_DCCP/UDPLITE change Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 15:50 +0100
  [PATCH 4.10 25/48] PCI: Prevent VPD access for QLogic ISP2722 Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 15:50 +0100
  [PATCH 4.10 05/48] crypto: improve gcc optimization flags for serpent and wp512 Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 15:50 +0100
  [PATCH 4.10 48/48] IB/mlx5: Verify that Q counters are supported Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 15:50 +0100
  [PATCH 4.10 26/48] usb: gadget: dummy_hcd: clear usb_gadget region before registration Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 15:50 +0100
  [PATCH 4.10 32/48] usb: host: xhci-dbg: HCIVERSION should be a binary number Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 15:50 +0100
  [PATCH 4.10 33/48] usb: host: xhci-plat: Fix timeout on removal of hot pluggable xhci controllers Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 15:50 +0100
  [PATCH 4.10 09/48] MIPS: Update ip27_defconfig for SCSI_DH change Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 15:50 +0100
  [PATCH 4.10 37/48] USB: iowarrior: fix NULL-deref in write Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 15:50 +0100
  [PATCH 4.10 11/48] MIPS: Update lemote2f_defconfig for CPU_FREQ_STAT change Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 16:00 +0100
  [PATCH 4.10 13/48] MIPS: ralink: Cosmetic change to prom_init(). Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 16:00 +0100
  [PATCH 4.10 02/48] ARM: qcom_defconfig: Enable RPM/RPM-SMD clocks Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 16:00 +0100
  [PATCH 4.10 10/48] MIPS: ip22: Fix ip28 build for modern gcc Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 16:00 +0100
  [PATCH 4.10 14/48] MIPS: ralink: Remove unused timer functions Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 16:00 +0100
  [PATCH 4.10 12/48] mtd: pmcmsp: use kstrndup instead of kmalloc+strncpy Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 16:00 +0100
  [PATCH 4.10 01/48] iio: 104-quad-8: Fix off-by-one error when addressing flag register Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-16 16:00 +0100
  Re: [PATCH 4.10 00/48] 4.10.4-stable review Shuah Khan <shuahkh@osg.samsung.com> - 2017-03-16 20:40 +0100
    Re: [PATCH 4.10 00/48] 4.10.4-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-17 02:50 +0100
  Re: [PATCH 4.10 00/48] 4.10.4-stable review Guenter Roeck <linux@roeck-us.net> - 2017-03-16 23:40 +0100
    Re: [PATCH 4.10 00/48] 4.10.4-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-17 02:50 +0100

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