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SubjectRe: [PATCH v1 2/4] usb: host: add xhci hooks for USB offload
Hi Daehwan,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on krzk/for-next]
[also build test ERROR on char-misc/char-misc-testing v5.17-rc7]
[cannot apply to usb/usb-testing next-20220308]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url: https://github.com/0day-ci/linux/commits/Daehwan-Jung/usb-host-export-symbols-for-xhci-hooks-usage/20220304-143406
base: https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux.git for-next
config: arm-hisi_defconfig (https://download.01.org/0day-ci/archive/20220308/202203081848.5KEiXYSo-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/0day-ci/linux/commit/2b6a5d700c2bbb0a3ccfcd6e83a7f7b2ea049db9
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Daehwan-Jung/usb-host-export-symbols-for-xhci-hooks-usage/20220304-143406
git checkout 2b6a5d700c2bbb0a3ccfcd6e83a7f7b2ea049db9
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arm SHELL=/bin/bash drivers/usb/host/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

drivers/usb/host/xhci.c:4361:5: warning: no previous prototype for 'xhci_address_device' [-Wmissing-prototypes]
4361 | int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev)
| ^~~~~~~~~~~~~~~~~~~
drivers/usb/host/xhci.c: In function 'xhci_vendor_get_ops':
>> drivers/usb/host/xhci.c:4459:20: error: 'struct xhci_hcd' has no member named 'vendor_ops'
4459 | return xhci->vendor_ops;
| ^~
drivers/usb/host/xhci.c:4460:1: error: control reaches end of non-void function [-Werror=return-type]
4460 | }
| ^
cc1: some warnings being treated as errors


vim +4459 drivers/usb/host/xhci.c

4360
> 4361 int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev)
4362 {
4363 return xhci_setup_device(hcd, udev, SETUP_CONTEXT_ADDRESS);
4364 }
4365 EXPORT_SYMBOL_GPL(xhci_address_device);
4366
4367 static int xhci_enable_device(struct usb_hcd *hcd, struct usb_device *udev)
4368 {
4369 return xhci_setup_device(hcd, udev, SETUP_CONTEXT_ONLY);
4370 }
4371
4372 /*
4373 * Transfer the port index into real index in the HW port status
4374 * registers. Caculate offset between the port's PORTSC register
4375 * and port status base. Divide the number of per port register
4376 * to get the real index. The raw port number bases 1.
4377 */
4378 int xhci_find_raw_port_number(struct usb_hcd *hcd, int port1)
4379 {
4380 struct xhci_hub *rhub;
4381
4382 rhub = xhci_get_rhub(hcd);
4383 return rhub->ports[port1 - 1]->hw_portnum + 1;
4384 }
4385
4386 /*
4387 * Issue an Evaluate Context command to change the Maximum Exit Latency in the
4388 * slot context. If that succeeds, store the new MEL in the xhci_virt_device.
4389 */
4390 static int __maybe_unused xhci_change_max_exit_latency(struct xhci_hcd *xhci,
4391 struct usb_device *udev, u16 max_exit_latency)
4392 {
4393 struct xhci_virt_device *virt_dev;
4394 struct xhci_command *command;
4395 struct xhci_input_control_ctx *ctrl_ctx;
4396 struct xhci_slot_ctx *slot_ctx;
4397 unsigned long flags;
4398 int ret;
4399
4400 spin_lock_irqsave(&xhci->lock, flags);
4401
4402 virt_dev = xhci->devs[udev->slot_id];
4403
4404 /*
4405 * virt_dev might not exists yet if xHC resumed from hibernate (S4) and
4406 * xHC was re-initialized. Exit latency will be set later after
4407 * hub_port_finish_reset() is done and xhci->devs[] are re-allocated
4408 */
4409
4410 if (!virt_dev || max_exit_latency == virt_dev->current_mel) {
4411 spin_unlock_irqrestore(&xhci->lock, flags);
4412 return 0;
4413 }
4414
4415 /* Attempt to issue an Evaluate Context command to change the MEL. */
4416 command = xhci->lpm_command;
4417 ctrl_ctx = xhci_get_input_control_ctx(command->in_ctx);
4418 if (!ctrl_ctx) {
4419 spin_unlock_irqrestore(&xhci->lock, flags);
4420 xhci_warn(xhci, "%s: Could not get input context, bad type.\n",
4421 __func__);
4422 return -ENOMEM;
4423 }
4424
4425 ret = xhci_vendor_sync_dev_ctx(xhci, udev->slot_id);
4426 if (ret) {
4427 spin_unlock_irqrestore(&xhci->lock, flags);
4428 xhci_warn(xhci, "%s: Failed to sync device context failed, err=%d",
4429 __func__, ret);
4430 return ret;
4431 }
4432
4433 xhci_slot_copy(xhci, command->in_ctx, virt_dev->out_ctx);
4434 spin_unlock_irqrestore(&xhci->lock, flags);
4435
4436 ctrl_ctx->add_flags |= cpu_to_le32(SLOT_FLAG);
4437 slot_ctx = xhci_get_slot_ctx(xhci, command->in_ctx);
4438 slot_ctx->dev_info2 &= cpu_to_le32(~((u32) MAX_EXIT));
4439 slot_ctx->dev_info2 |= cpu_to_le32(max_exit_latency);
4440 slot_ctx->dev_state = 0;
4441
4442 xhci_dbg_trace(xhci, trace_xhci_dbg_context_change,
4443 "Set up evaluate context for LPM MEL change.");
4444
4445 /* Issue and wait for the evaluate context command. */
4446 ret = xhci_configure_endpoint(xhci, udev, command,
4447 true, true);
4448
4449 if (!ret) {
4450 spin_lock_irqsave(&xhci->lock, flags);
4451 virt_dev->current_mel = max_exit_latency;
4452 spin_unlock_irqrestore(&xhci->lock, flags);
4453 }
4454 return ret;
4455 }
4456
4457 struct xhci_vendor_ops *xhci_vendor_get_ops(struct xhci_hcd *xhci)
4458 {
> 4459 return xhci->vendor_ops;
4460 }
4461 EXPORT_SYMBOL_GPL(xhci_vendor_get_ops);
4462

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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