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Date: Thu, 20 Oct 2022 23:13:49 +0800
From: kernel test robot <lkp@...el.com>
To: wangwenmei168@....com, mathias.nyman@...el.com,
gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: kbuild-all@...ts.01.org, gehao <gehao@...inos.cn>
Subject: Re: [RESEND PATCH] xhci: Fix Renesas PCIe controllers passthrough
issue
Hi,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on usb/usb-testing]
[also build test WARNING on linus/master v6.1-rc1 next-20221020]
[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#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/wangwenmei168-163-com/xhci-Fix-Renesas-PCIe-controllers-passthrough-issue/20221020-183913
base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
patch link: https://lore.kernel.org/r/20221020103914.262202-1-wangwenmei168%40163.com
patch subject: [RESEND PATCH] xhci: Fix Renesas PCIe controllers passthrough issue
config: i386-randconfig-a003
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce (this is a W=1 build):
# https://github.com/intel-lab-lkp/linux/commit/8398c1621f41a99e7fe38f1c7c705ea1c61f2411
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review wangwenmei168-163-com/xhci-Fix-Renesas-PCIe-controllers-passthrough-issue/20221020-183913
git checkout 8398c1621f41a99e7fe38f1c7c705ea1c61f2411
# save the config file
mkdir build_dir && cp config build_dir/.config
make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/usb/host/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
drivers/usb/host/xhci.c: In function 'xhci_zero_64b_regs':
>> drivers/usb/host/xhci.c:230:24: warning: unused variable 'dev' [-Wunused-variable]
230 | struct device *dev = xhci_to_hcd(xhci)->self.sysdev;
| ^~~
vim +/dev +230 drivers/usb/host/xhci.c
66d4eadd8d0672 drivers/usb/host/xhci-hcd.c Sarah Sharp 2009-04-27 227
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 228 static void xhci_zero_64b_regs(struct xhci_hcd *xhci)
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 229 {
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 @230 struct device *dev = xhci_to_hcd(xhci)->self.sysdev;
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 231 int err, i;
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 232 u64 val;
286fd02fd54b6a drivers/usb/host/xhci.c Mathias Nyman 2021-04-06 233 u32 intrs;
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 234
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 235 /*
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 236 * Some Renesas controllers get into a weird state if they are
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 237 * reset while programmed with 64bit addresses (they will preserve
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 238 * the top half of the address in internal, non visible
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 239 * registers). You end up with half the address coming from the
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 240 * kernel, and the other half coming from the firmware. Also,
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 241 * changing the programming leads to extra accesses even if the
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 242 * controller is supposed to be halted. The controller ends up with
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 243 * a fatal fault, and is then ripe for being properly reset.
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 244 */
8398c1621f41a9 drivers/usb/host/xhci.c gehao 2022-10-20 245 if (!(xhci->quirks & XHCI_ZERO_64B_REGS))
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 246 return;
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 247
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 248 xhci_info(xhci, "Zeroing 64bit base registers, expecting fault\n");
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 249
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 250 /* Clear HSEIE so that faults do not get signaled */
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 251 val = readl(&xhci->op_regs->command);
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 252 val &= ~CMD_HSEIE;
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 253 writel(val, &xhci->op_regs->command);
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 254
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 255 /* Clear HSE (aka FATAL) */
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 256 val = readl(&xhci->op_regs->status);
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 257 val |= STS_FATAL;
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 258 writel(val, &xhci->op_regs->status);
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 259
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 260 /* Now zero the registers, and brace for impact */
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 261 val = xhci_read_64(xhci, &xhci->op_regs->dcbaa_ptr);
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 262 if (upper_32_bits(val))
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 263 xhci_write_64(xhci, 0, &xhci->op_regs->dcbaa_ptr);
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 264 val = xhci_read_64(xhci, &xhci->op_regs->cmd_ring);
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 265 if (upper_32_bits(val))
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 266 xhci_write_64(xhci, 0, &xhci->op_regs->cmd_ring);
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 267
286fd02fd54b6a drivers/usb/host/xhci.c Mathias Nyman 2021-04-06 268 intrs = min_t(u32, HCS_MAX_INTRS(xhci->hcs_params1),
286fd02fd54b6a drivers/usb/host/xhci.c Mathias Nyman 2021-04-06 269 ARRAY_SIZE(xhci->run_regs->ir_set));
286fd02fd54b6a drivers/usb/host/xhci.c Mathias Nyman 2021-04-06 270
286fd02fd54b6a drivers/usb/host/xhci.c Mathias Nyman 2021-04-06 271 for (i = 0; i < intrs; i++) {
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 272 struct xhci_intr_reg __iomem *ir;
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 273
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 274 ir = &xhci->run_regs->ir_set[i];
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 275 val = xhci_read_64(xhci, &ir->erst_base);
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 276 if (upper_32_bits(val))
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 277 xhci_write_64(xhci, 0, &ir->erst_base);
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 278 val= xhci_read_64(xhci, &ir->erst_dequeue);
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 279 if (upper_32_bits(val))
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 280 xhci_write_64(xhci, 0, &ir->erst_dequeue);
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 281 }
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 282
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 283 /* Wait for the fault to appear. It will be cleared on reset */
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 284 err = xhci_handshake(&xhci->op_regs->status,
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 285 STS_FATAL, STS_FATAL,
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 286 XHCI_MAX_HALT_USEC);
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 287 if (!err)
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 288 xhci_info(xhci, "Fault detected\n");
12de0a35c996c3 drivers/usb/host/xhci.c Marc Zyngier 2018-05-23 289 }
43b86af83da7db drivers/usb/host/xhci.c Dong Nguyen 2010-07-21 290
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