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Message-ID: <202409250201.ZlZsYfH8-lkp@intel.com>
Date: Wed, 25 Sep 2024 02:32:36 +0800
From: kernel test robot <lkp@...el.com>
To: Junhui Liu <liujh2818@...il.com>,
Philipp Zabel <p.zabel@...gutronix.de>,
Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Junhui Liu <liujh2818@...look.com>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-riscv@...ts.infradead.org
Subject: Re: [PATCH 2/2] reset: canaan: Add reset driver for Kendryte K230
Hi Junhui,
kernel test robot noticed the following build warnings:
[auto build test WARNING on abf2050f51fdca0fd146388f83cddd95a57a008d]
url: https://github.com/intel-lab-lkp/linux/commits/Junhui-Liu/dt-bindings-reset-Add-support-for-canaan-k230-rst/20240924-140732
base: abf2050f51fdca0fd146388f83cddd95a57a008d
patch link: https://lore.kernel.org/r/20240924-k230-reset-v1-2-d0cdc11989eb%40outlook.com
patch subject: [PATCH 2/2] reset: canaan: Add reset driver for Kendryte K230
config: hexagon-allmodconfig (https://download.01.org/0day-ci/archive/20240925/202409250201.ZlZsYfH8-lkp@intel.com/config)
compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project 8663a75fa2f31299ab8d1d90288d9df92aadee88)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240925/202409250201.ZlZsYfH8-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202409250201.ZlZsYfH8-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from drivers/reset/reset-k230.c:8:
In file included from include/linux/io.h:14:
In file included from arch/hexagon/include/asm/io.h:328:
include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
548 | val = __raw_readb(PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
561 | val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
| ~~~~~~~~~~ ^
include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
37 | #define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
| ^
In file included from drivers/reset/reset-k230.c:8:
In file included from include/linux/io.h:14:
In file included from arch/hexagon/include/asm/io.h:328:
include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
574 | val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
| ~~~~~~~~~~ ^
include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
| ^
In file included from drivers/reset/reset-k230.c:8:
In file included from include/linux/io.h:14:
In file included from arch/hexagon/include/asm/io.h:328:
include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
585 | __raw_writeb(value, PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
595 | __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
605 | __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
>> drivers/reset/reset-k230.c:223:7: warning: variable 'ret' is used uninitialized whenever switch case is taken [-Wsometimes-uninitialized]
223 | case RST_TYPE_SW_DONE:
| ^~~~~~~~~~~~~~~~
drivers/reset/reset-k230.c:231:9: note: uninitialized use occurs here
231 | return ret;
| ^~~
drivers/reset/reset-k230.c:214:7: warning: variable 'ret' is used uninitialized whenever switch case is taken [-Wsometimes-uninitialized]
214 | case RST_TYPE_CPU1:
| ^~~~~~~~~~~~~
drivers/reset/reset-k230.c:231:9: note: uninitialized use occurs here
231 | return ret;
| ^~~
drivers/reset/reset-k230.c:215:7: warning: variable 'ret' is used uninitialized whenever switch case is taken [-Wsometimes-uninitialized]
215 | case RST_TYPE_FLUSH:
| ^~~~~~~~~~~~~~
drivers/reset/reset-k230.c:231:9: note: uninitialized use occurs here
231 | return ret;
| ^~~
drivers/reset/reset-k230.c:206:9: note: initialize the variable 'ret' to silence this warning
206 | int ret;
| ^
| = 0
drivers/reset/reset-k230.c:250:7: warning: variable 'ret' is used uninitialized whenever switch case is taken [-Wsometimes-uninitialized]
250 | case RST_TYPE_SW_DONE:
| ^~~~~~~~~~~~~~~~
drivers/reset/reset-k230.c:258:9: note: uninitialized use occurs here
258 | return ret;
| ^~~
drivers/reset/reset-k230.c:247:7: warning: variable 'ret' is used uninitialized whenever switch case is taken [-Wsometimes-uninitialized]
247 | case RST_TYPE_FLUSH:
| ^~~~~~~~~~~~~~
drivers/reset/reset-k230.c:258:9: note: uninitialized use occurs here
258 | return ret;
| ^~~
drivers/reset/reset-k230.c:248:7: warning: variable 'ret' is used uninitialized whenever switch case is taken [-Wsometimes-uninitialized]
248 | case RST_TYPE_HW_DONE:
| ^~~~~~~~~~~~~~~~
drivers/reset/reset-k230.c:258:9: note: uninitialized use occurs here
258 | return ret;
| ^~~
drivers/reset/reset-k230.c:241:7: warning: variable 'ret' is used uninitialized whenever switch case is taken [-Wsometimes-uninitialized]
241 | case RST_TYPE_CPU0:
| ^~~~~~~~~~~~~
drivers/reset/reset-k230.c:258:9: note: uninitialized use occurs here
258 | return ret;
| ^~~
drivers/reset/reset-k230.c:238:9: note: initialize the variable 'ret' to silence this warning
238 | int ret;
| ^
| = 0
13 warnings generated.
Kconfig warnings: (for reference only)
WARNING: unmet direct dependencies detected for GET_FREE_REGION
Depends on [n]: SPARSEMEM [=n]
Selected by [m]:
- RESOURCE_KUNIT_TEST [=m] && RUNTIME_TESTING_MENU [=y] && KUNIT [=m]
vim +/ret +223 drivers/reset/reset-k230.c
201
202 static int k230_rst_assert(struct reset_controller_dev *rcdev, unsigned long id)
203 {
204 struct k230_rst *rstc = to_k230_rst(rcdev);
205 const struct k230_rst_map *rmap = &k230_resets[id];
206 int ret;
207
208 switch (rmap->type) {
209 case RST_TYPE_CPU0:
210 k230_rst_clear_done(rstc, id, true);
211 k230_rst_update(rstc, id, true, true, false);
212 ret = k230_rst_wait_and_clear_done(rstc, id, true);
213 break;
214 case RST_TYPE_CPU1:
215 case RST_TYPE_FLUSH:
216 k230_rst_update(rstc, id, true, true, false);
217 break;
218 case RST_TYPE_HW_DONE:
219 k230_rst_clear_done(rstc, id, false);
220 k230_rst_update(rstc, id, true, false, false);
221 ret = k230_rst_wait_and_clear_done(rstc, id, false);
222 break;
> 223 case RST_TYPE_SW_DONE:
224 k230_rst_update(rstc, id, true, false,
225 id == RST_SPI2AXI ? false : true);
226 break;
227 default:
228 return -EINVAL;
229 }
230
231 return ret;
232 }
233
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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