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Date:   Tue, 15 Dec 2020 05:58:41 +0000
From:   Peter Chen <peter.chen@....com>
To:     kernel test robot <lkp@...el.com>
CC:     Pawel Laszczak <pawell@...ence.com>,
        "kbuild-all@...ts.01.org" <kbuild-all@...ts.01.org>,
        "rogerq@...com" <rogerq@...com>,
        "a-govindraju@...com" <a-govindraju@...com>,
        "nsekhar@...com" <nsekhar@...com>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kurahul@...ence.com" <kurahul@...ence.com>
Subject: Re: [PATCH] usb: cdns3: Adds missing __iomem markers

On 20-12-14 23:35:56, kernel test robot wrote:
> Hi Pawel,
> 
> I love your patch! Perhaps something to improve:
> 
> [auto build test WARNING on next-20201211]
> [cannot apply to peter.chen-usb/ci-for-usb-next v5.10 v5.10-rc7 v5.10-rc6 v5.10]

Sorry, I changed the branch name to reflect the branch does not only queue
chipidea USB patches.

next branch: for-usb-next
fixes branch: for-usb-fixes

Peter

> [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://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgit-scm.com%2Fdocs%2Fgit-format-patch&amp;data=04%7C01%7Cpeter.chen%40nxp.com%7C6ce79474794448ae12b008d8a045f9ce%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C637435572341553421%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=Cy3huYNzWiJ57OKmzmaleCT14gcFr8RyYDnqTfZWNG4%3D&amp;reserved=0]
> 
> url:    https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2F0day-ci%2Flinux%2Fcommits%2FPawel-Laszczak%2Fusb-cdns3-Adds-missing-__iomem-markers%2F20201214-205353&amp;data=04%7C01%7Cpeter.chen%40nxp.com%7C6ce79474794448ae12b008d8a045f9ce%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C637435572341553421%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=x5XoDUUskeGteTFaPjgS24Hrbb712XqMqaIkqwXWu14%3D&amp;reserved=0
> base:    3cc2bd440f2171f093b3a8480a4b54d8c270ed38
> config: riscv-allmodconfig (attached as .config)
> compiler: riscv64-linux-gcc (GCC) 9.3.0
> reproduce (this is a W=1 build):
>         wget https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fraw.githubusercontent.com%2Fintel%2Flkp-tests%2Fmaster%2Fsbin%2Fmake.cross&amp;data=04%7C01%7Cpeter.chen%40nxp.com%7C6ce79474794448ae12b008d8a045f9ce%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C637435572341553421%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=jAavg0T3itnjkbHXADvePHHgtYeqiVTBt%2BoatHT0VHU%3D&amp;reserved=0 -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2F0day-ci%2Flinux%2Fcommit%2F315bfcf1e0604de6ecfc1856cf5820876390f16c&amp;data=04%7C01%7Cpeter.chen%40nxp.com%7C6ce79474794448ae12b008d8a045f9ce%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C637435572341553421%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=SQ75IXxfld6HMRIFkZ%2F8Z4YqxnFP%2F%2BZ%2BsYZIycNeO%2FA%3D&amp;reserved=0
>         git remote add linux-review https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2F0day-ci%2Flinux&amp;data=04%7C01%7Cpeter.chen%40nxp.com%7C6ce79474794448ae12b008d8a045f9ce%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C637435572341553421%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=ZVS4723WbEO03hbsLXJ%2B%2FmB5EZElulY7lAsMEMatiko%3D&amp;reserved=0
>         git fetch --no-tags linux-review Pawel-Laszczak/usb-cdns3-Adds-missing-__iomem-markers/20201214-205353
>         git checkout 315bfcf1e0604de6ecfc1856cf5820876390f16c
>         # save the attached .config to linux build tree
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=riscv 
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@...el.com>
> 
> All warnings (new ones prefixed by >>):
> 
>    In file included from arch/riscv/include/asm/io.h:23,
>                     from include/linux/io.h:13,
>                     from include/linux/irq.h:20,
>                     from include/asm-generic/hardirq.h:17,
>                     from ./arch/riscv/include/generated/asm/hardirq.h:1,
>                     from include/linux/hardirq.h:10,
>                     from include/linux/interrupt.h:11,
>                     from drivers/usb/cdns3/drd.c:13:
>    drivers/usb/cdns3/drd.c: In function 'cdns_otg_disable_irq':
>    drivers/usb/cdns3/drd.c:159:31: error: dereferencing pointer to incomplete type 'struct cdns_otg_irq_reg'
>      159 |  writel(0, &cdns->otg_irq_regs->ien);
>          |                               ^~
>    arch/riscv/include/asm/mmio.h:93:76: note: in definition of macro 'writel_cpu'
>       93 | #define writel_cpu(v, c) ((void)__raw_writel((__force u32)cpu_to_le32(v), (c)))
>          |                                                                            ^
>    drivers/usb/cdns3/drd.c:159:2: note: in expansion of macro 'writel'
>      159 |  writel(0, &cdns->otg_irq_regs->ien);
>          |  ^~~~~~
>    drivers/usb/cdns3/drd.c: In function 'cdns_drd_init':
>    drivers/usb/cdns3/drd.c:409:22: error: assignment to 'struct cdns_otg_irq_reg *' from incompatible pointer type 'struct cdns_otg_irq_regs *' [-Werror=incompatible-pointer-types]
>      409 |   cdns->otg_irq_regs = (struct cdns_otg_irq_regs __iomem  *)
>          |                      ^
>    In file included from include/linux/byteorder/little_endian.h:5,
>                     from arch/riscv/include/uapi/asm/byteorder.h:10,
>                     from include/asm-generic/bitops/le.h:6,
>                     from arch/riscv/include/asm/bitops.h:202,
>                     from include/linux/bitops.h:32,
>                     from include/linux/kernel.h:11,
>                     from drivers/usb/cdns3/drd.c:12:
> >> drivers/usb/cdns3/drd.c:421:33: warning: passing argument 1 of '__raw_readl' makes pointer from integer without a cast [-Wint-conversion]
>      421 |   if (readl(cdns->otg_cdnsp_regs->did) == OTG_CDNSP_DID) {
>          |             ~~~~~~~~~~~~~~~~~~~~^~~~~
>          |                                 |
>          |                                 __le32 {aka unsigned int}
>    include/uapi/linux/byteorder/little_endian.h:34:51: note: in definition of macro '__le32_to_cpu'
>       34 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
>          |                                                   ^
>    arch/riscv/include/asm/mmio.h:140:47: note: in expansion of macro 'readl_cpu'
>      140 | #define readl(c) ({ u32 __v; __io_br(); __v = readl_cpu(c); __io_ar(__v); __v; })
>          |                                               ^~~~~~~~~
>    drivers/usb/cdns3/drd.c:421:7: note: in expansion of macro 'readl'
>      421 |   if (readl(cdns->otg_cdnsp_regs->did) == OTG_CDNSP_DID) {
>          |       ^~~~~
>    In file included from arch/riscv/include/asm/io.h:23,
>                     from include/linux/io.h:13,
>                     from include/linux/irq.h:20,
>                     from include/asm-generic/hardirq.h:17,
>                     from ./arch/riscv/include/generated/asm/hardirq.h:1,
>                     from include/linux/hardirq.h:10,
>                     from include/linux/interrupt.h:11,
>                     from drivers/usb/cdns3/drd.c:13:
>    arch/riscv/include/asm/mmio.h:63:60: note: expected 'const volatile void *' but argument is of type '__le32' {aka 'unsigned int'}
>       63 | static inline u32 __raw_readl(const volatile void __iomem *addr)
>          |                               ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~
>    drivers/usb/cdns3/drd.c:422:23: error: assignment to 'struct cdns_otg_irq_reg *' from incompatible pointer type 'struct cdns_otg_irq_regs *' [-Werror=incompatible-pointer-types]
>      422 |    cdns->otg_irq_regs = (struct cdns_otg_irq_regs __iomem *)
>          |                       ^
>    drivers/usb/cdns3/drd.c:426:23: error: assignment to 'struct cdns_otg_irq_reg *' from incompatible pointer type 'struct cdns_otg_irq_regs *' [-Werror=incompatible-pointer-types]
>      426 |    cdns->otg_irq_regs = (struct cdns_otg_irq_regs __iomem *)
>          |                       ^
>    cc1: some warnings being treated as errors
> 
> vim +/__raw_readl +421 drivers/usb/cdns3/drd.c
> 
>    383	
>    384	int cdns_drd_init(struct cdns *cdns)
>    385	{
>    386		void __iomem *regs;
>    387		u32 state;
>    388		int ret;
>    389	
>    390		regs = devm_ioremap_resource(cdns->dev, &cdns->otg_res);
>    391		if (IS_ERR(regs))
>    392			return PTR_ERR(regs);
>    393	
>    394		/* Detection of DRD version. Controller has been released
>    395		 * in three versions. All are very similar and are software compatible,
>    396		 * but they have same changes in register maps.
>    397		 * The first register in oldest version is command register and it's
>    398		 * read only. Driver should read 0 from it. On the other hand, in v1
>    399		 * and v2 the first register contains device ID number which is not
>    400		 * set to 0. Driver uses this fact to detect the proper version of
>    401		 * controller.
>    402		 */
>    403		cdns->otg_v0_regs = regs;
>    404		if (!readl(&cdns->otg_v0_regs->cmd)) {
>    405			cdns->version  = CDNS3_CONTROLLER_V0;
>    406			cdns->otg_v1_regs = NULL;
>    407			cdns->otg_cdnsp_regs = NULL;
>    408			cdns->otg_regs = regs;
>    409			cdns->otg_irq_regs = (struct cdns_otg_irq_regs __iomem  *)
>    410					     &cdns->otg_v0_regs->ien;
>    411			writel(1, &cdns->otg_v0_regs->simulate);
>    412			dev_dbg(cdns->dev, "DRD version v0 (%08x)\n",
>    413				 readl(&cdns->otg_v0_regs->version));
>    414		} else {
>    415			cdns->otg_v0_regs = NULL;
>    416			cdns->otg_v1_regs = regs;
>    417			cdns->otg_cdnsp_regs = regs;
>    418	
>    419			cdns->otg_regs = (void __iomem *)&cdns->otg_v1_regs->cmd;
>    420	
>  > 421			if (readl(cdns->otg_cdnsp_regs->did) == OTG_CDNSP_DID) {
>    422				cdns->otg_irq_regs = (struct cdns_otg_irq_regs __iomem *)
>    423						      &cdns->otg_cdnsp_regs->ien;
>    424				cdns->version  = CDNSP_CONTROLLER_V2;
>    425			} else {
>    426				cdns->otg_irq_regs = (struct cdns_otg_irq_regs __iomem *)
>    427						      &cdns->otg_v1_regs->ien;
>    428				writel(1, &cdns->otg_v1_regs->simulate);
>    429				cdns->version  = CDNS3_CONTROLLER_V1;
>    430			}
>    431	
>    432			dev_dbg(cdns->dev, "DRD version v1 (ID: %08x, rev: %08x)\n",
>    433				 readl(&cdns->otg_v1_regs->did),
>    434				 readl(&cdns->otg_v1_regs->rid));
>    435		}
>    436	
>    437		state = OTGSTS_STRAP(readl(&cdns->otg_regs->sts));
>    438	
>    439		/* Update dr_mode according to STRAP configuration. */
>    440		cdns->dr_mode = USB_DR_MODE_OTG;
>    441	
>    442		if ((cdns->version == CDNSP_CONTROLLER_V2 &&
>    443		     state == OTGSTS_CDNSP_STRAP_HOST) ||
>    444		    (cdns->version != CDNSP_CONTROLLER_V2 &&
>    445		     state == OTGSTS_STRAP_HOST)) {
>    446			dev_dbg(cdns->dev, "Controller strapped to HOST\n");
>    447			cdns->dr_mode = USB_DR_MODE_HOST;
>    448		} else if ((cdns->version == CDNSP_CONTROLLER_V2 &&
>    449			    state == OTGSTS_CDNSP_STRAP_GADGET) ||
>    450			   (cdns->version != CDNSP_CONTROLLER_V2 &&
>    451			    state == OTGSTS_STRAP_GADGET)) {
>    452			dev_dbg(cdns->dev, "Controller strapped to PERIPHERAL\n");
>    453			cdns->dr_mode = USB_DR_MODE_PERIPHERAL;
>    454		}
>    455	
>    456		ret = devm_request_threaded_irq(cdns->dev, cdns->otg_irq,
>    457						cdns_drd_irq,
>    458						cdns_drd_thread_irq,
>    459						IRQF_SHARED,
>    460						dev_name(cdns->dev), cdns);
>    461		if (ret) {
>    462			dev_err(cdns->dev, "couldn't get otg_irq\n");
>    463			return ret;
>    464		}
>    465	
>    466		state = readl(&cdns->otg_regs->sts);
>    467		if (OTGSTS_OTG_NRDY(state)) {
>    468			dev_err(cdns->dev, "Cadence USB3 OTG device not ready\n");
>    469			return -ENODEV;
>    470		}
>    471	
>    472		return 0;
>    473	}
>    474	
> 
> ---
> 0-DAY CI Kernel Test Service, Intel Corporation
> https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.01.org%2Fhyperkitty%2Flist%2Fkbuild-all%40lists.01.org&amp;data=04%7C01%7Cpeter.chen%40nxp.com%7C6ce79474794448ae12b008d8a045f9ce%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C637435572341553421%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=v9fQGKZKobtIysXu43lCekV%2FoXCc2EZZXIxoTtQpSdw%3D&amp;reserved=0



-- 

Thanks,
Peter Chen

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