Re: [PATCH] mmc: inline the first mmc_scan() on mmc_start_host()

From: kernel test robot
Date: Wed Mar 29 2023 - 19:37:26 EST

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In reply to: kernel test robot: "Re: [PATCH] mmc: inline the first mmc_scan() on mmc_start_host()"
Next in thread: Dennis Zhou: "[PATCH v2] mmc: inline the first mmc_scan() on mmc_start_host()"
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Hi Dennis,

I love your patch! Perhaps something to improve:

[auto build test WARNING on ulf-hansson-mmc-mirror/next]
[also build test WARNING on linus/master v6.3-rc4 next-20230329]
[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/Dennis-Zhou/mmc-inline-the-first-mmc_scan-on-mmc_start_host/20230330-042213
base: https://git.linaro.org/people/ulf.hansson/mmc-mirror.git next
patch link: https://lore.kernel.org/r/20230329202148.71107-1-dennis%40kernel.org
patch subject: [PATCH] mmc: inline the first mmc_scan() on mmc_start_host()
config: hexagon-randconfig-r045-20230329 (https://download.01.org/0day-ci/archive/20230330/202303300728.pAr0H6ZJ-lkp@xxxxxxxxx/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 67409911353323ca5edf2049ef0df54132fa1ca7)
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/intel-lab-lkp/linux/commit/d2de7314d2198df0c7a452546af0c15799b2d864
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Dennis-Zhou/mmc-inline-the-first-mmc_scan-on-mmc_start_host/20230330-042213
git checkout d2de7314d2198df0c7a452546af0c15799b2d864
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/mmc/core/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Link: https://lore.kernel.org/oe-kbuild-all/202303300728.pAr0H6ZJ-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

In file included from drivers/mmc/core/core.c:12:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/hexagon/include/asm/io.h:334:
include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __raw_readb(PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
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'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
^
In file included from drivers/mmc/core/core.c:12:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/hexagon/include/asm/io.h:334:
include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
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'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
^
In file included from drivers/mmc/core/core.c:12:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/hexagon/include/asm/io.h:334:
include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writeb(value, PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
>> drivers/mmc/core/core.c:2202:6: warning: no previous prototype for function '__mmc_rescan' [-Wmissing-prototypes]
void __mmc_rescan(struct mmc_host *host)
^
drivers/mmc/core/core.c:2202:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __mmc_rescan(struct mmc_host *host)
^
static
7 warnings generated.

vim +/__mmc_rescan +2202 drivers/mmc/core/core.c

2201
> 2202 void __mmc_rescan(struct mmc_host *host)
2203 {
2204 int i;
2205
2206 if (host->rescan_disable)
2207 return;
2208
2209 /* If there is a non-removable card registered, only scan once */
2210 if (!mmc_card_is_removable(host) && host->rescan_entered)
2211 return;
2212 host->rescan_entered = 1;
2213
2214 if (host->trigger_card_event && host->ops->card_event) {
2215 mmc_claim_host(host);
2216 host->ops->card_event(host);
2217 mmc_release_host(host);
2218 host->trigger_card_event = false;
2219 }
2220
2221 /* Verify a registered card to be functional, else remove it. */
2222 if (host->bus_ops)
2223 host->bus_ops->detect(host);
2224
2225 host->detect_change = 0;
2226
2227 /* if there still is a card present, stop here */
2228 if (host->bus_ops != NULL)
2229 goto out;
2230
2231 mmc_claim_host(host);
2232 if (mmc_card_is_removable(host) && host->ops->get_cd &&
2233 host->ops->get_cd(host) == 0) {
2234 mmc_power_off(host);
2235 mmc_release_host(host);
2236 goto out;
2237 }
2238
2239 /* If an SD express card is present, then leave it as is. */
2240 if (mmc_card_sd_express(host)) {
2241 mmc_release_host(host);
2242 goto out;
2243 }
2244
2245 for (i = 0; i < ARRAY_SIZE(freqs); i++) {
2246 unsigned int freq = freqs[i];
2247 if (freq > host->f_max) {
2248 if (i + 1 < ARRAY_SIZE(freqs))
2249 continue;
2250 freq = host->f_max;
2251 }
2252 if (!mmc_rescan_try_freq(host, max(freq, host->f_min)))
2253 break;
2254 if (freqs[i] <= host->f_min)
2255 break;
2256 }
2257
2258 /*
2259 * Ignore the command timeout errors observed during
2260 * the card init as those are excepted.
2261 */
2262 host->err_stats[MMC_ERR_CMD_TIMEOUT] = 0;
2263 mmc_release_host(host);
2264
2265 out:
2266 if (host->caps & MMC_CAP_NEEDS_POLL)
2267 mmc_schedule_delayed_work(&host->detect, HZ);
2268 }
2269

--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests

Next message: technoboy85: "[PATCH] rust: fix bindgen arguments"
Previous message: Isaku Yamahata: "Re: [PATCH v13 018/113] KVM: x86, tdx: Make KVM_CAP_MAX_VCPUS backend specific"
In reply to: kernel test robot: "Re: [PATCH] mmc: inline the first mmc_scan() on mmc_start_host()"
Next in thread: Dennis Zhou: "[PATCH v2] mmc: inline the first mmc_scan() on mmc_start_host()"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]