[PATCH v1 1/1] spi: Replace match_true() by device_match_any()

[PATCH v1 1/1] spi: Replace match_true() by device_match_any()

[Andy Shevchenko]

We have already a helper to match any device, use it and drop match_true().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/spi/spi.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index ea09d1b42bf6..24440cd4aa5e 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -2613,11 +2613,6 @@ int spi_slave_abort(struct spi_device *spi)
 }
 EXPORT_SYMBOL_GPL(spi_slave_abort);
 
-static int match_true(struct device *dev, void *data)
-{
-	return 1;
-}
-
 static ssize_t slave_show(struct device *dev, struct device_attribute *attr,
 			  char *buf)
 {
@@ -2625,7 +2620,7 @@ static ssize_t slave_show(struct device *dev, struct device_attribute *attr,
 						   dev);
 	struct device *child;
 
-	child = device_find_child(&ctlr->dev, NULL, match_true);
+	child = device_find_child(&ctlr->dev, NULL, device_match_any);
 	return sprintf(buf, "%s\n",
 		       child ? to_spi_device(child)->modalias : NULL);
 }
@@ -2644,7 +2639,7 @@ static ssize_t slave_store(struct device *dev, struct device_attribute *attr,
 	if (rc != 1 || !name[0])
 		return -EINVAL;
 
-	child = device_find_child(&ctlr->dev, NULL, match_true);
+	child = device_find_child(&ctlr->dev, NULL, device_match_any);
 	if (child) {
 		/* Remove registered slave */
 		device_unregister(child);
-- 
2.35.1

Re: [PATCH v1 1/1] spi: Replace match_true() by device_match_any()

[Andy Shevchenko]

On Tue, Jun 07, 2022 at 10:06:01PM +0300, Andy Shevchenko wrote:
> We have already a helper to match any device, use it and drop match_true().

Scratch this, it seems I compiled against wrong config and haven't noticed
types mismatch.

We can't use the proposed helper since it's only for for_each type of
functions.

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH v1 1/1] spi: Replace match_true() by device_match_any()

[kernel test robot]

Hi Andy,

I love your patch! Yet something to improve:

[auto build test ERROR on broonie-spi/for-next]
[also build test ERROR on v5.19-rc1 next-20220608]
[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/intel-lab-lkp/linux/commits/Andy-Shevchenko/spi-Replace-match_true-by-device_match_any/20220608-091910
base:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next
config: i386-randconfig-a002 (https://download.01.org/0day-ci/archive/20220609/202206090508.laygQP9P-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project b92436efcb7813fc481b30f2593a4907568d917a)
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/bbdbed23cc6f2f8e7c9d8da3bb6c78fe488747f1
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Andy-Shevchenko/spi-Replace-match_true-by-device_match_any/20220608-091910
        git checkout bbdbed23cc6f2f8e7c9d8da3bb6c78fe488747f1
        # 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=i386 SHELL=/bin/bash drivers/

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

All errors (new ones prefixed by >>):

>> drivers/spi/spi.c:2670:46: error: incompatible function pointer types passing 'int (struct device *, const void *)' to parameter of type 'int (*)(struct device *, void *)' [-Werror,-Wincompatible-function-pointer-types]
           child = device_find_child(&ctlr->dev, NULL, device_match_any);
                                                       ^~~~~~~~~~~~~~~~
   include/linux/device.h:905:12: note: passing argument to parameter 'match' here
                                    int (*match)(struct device *dev, void *data));
                                          ^
   drivers/spi/spi.c:2689:46: error: incompatible function pointer types passing 'int (struct device *, const void *)' to parameter of type 'int (*)(struct device *, void *)' [-Werror,-Wincompatible-function-pointer-types]
           child = device_find_child(&ctlr->dev, NULL, device_match_any);
                                                       ^~~~~~~~~~~~~~~~
   include/linux/device.h:905:12: note: passing argument to parameter 'match' here
                                    int (*match)(struct device *dev, void *data));
                                          ^
   2 errors generated.


vim +2670 drivers/spi/spi.c

  2662	
  2663	static ssize_t slave_show(struct device *dev, struct device_attribute *attr,
  2664				  char *buf)
  2665	{
  2666		struct spi_controller *ctlr = container_of(dev, struct spi_controller,
  2667							   dev);
  2668		struct device *child;
  2669	
> 2670		child = device_find_child(&ctlr->dev, NULL, device_match_any);
  2671		return sprintf(buf, "%s\n",
  2672			       child ? to_spi_device(child)->modalias : NULL);
  2673	}
  2674	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp

Re: [PATCH v1 1/1] spi: Replace match_true() by device_match_any()

[kernel test robot]

Hi Andy,

I love your patch! Yet something to improve:

[auto build test ERROR on broonie-spi/for-next]
[also build test ERROR on v5.19-rc1 next-20220608]
[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/intel-lab-lkp/linux/commits/Andy-Shevchenko/spi-Replace-match_true-by-device_match_any/20220608-091910
base:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next
config: x86_64-randconfig-a013 (https://download.01.org/0day-ci/archive/20220609/202206090531.0eWVAe0k-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-3) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/bbdbed23cc6f2f8e7c9d8da3bb6c78fe488747f1
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Andy-Shevchenko/spi-Replace-match_true-by-device_match_any/20220608-091910
        git checkout bbdbed23cc6f2f8e7c9d8da3bb6c78fe488747f1
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

   drivers/spi/spi.c: In function 'slave_show':
>> drivers/spi/spi.c:2670:53: error: passing argument 3 of 'device_find_child' from incompatible pointer type [-Werror=incompatible-pointer-types]
    2670 |         child = device_find_child(&ctlr->dev, NULL, device_match_any);
         |                                                     ^~~~~~~~~~~~~~~~
         |                                                     |
         |                                                     int (*)(struct device *, const void *)
   In file included from drivers/spi/spi.c:8:
   include/linux/device.h:905:40: note: expected 'int (*)(struct device *, void *)' but argument is of type 'int (*)(struct device *, const void *)'
     905 |                                  int (*match)(struct device *dev, void *data));
         |                                  ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/spi/spi.c: In function 'slave_store':
   drivers/spi/spi.c:2689:53: error: passing argument 3 of 'device_find_child' from incompatible pointer type [-Werror=incompatible-pointer-types]
    2689 |         child = device_find_child(&ctlr->dev, NULL, device_match_any);
         |                                                     ^~~~~~~~~~~~~~~~
         |                                                     |
         |                                                     int (*)(struct device *, const void *)
   In file included from drivers/spi/spi.c:8:
   include/linux/device.h:905:40: note: expected 'int (*)(struct device *, void *)' but argument is of type 'int (*)(struct device *, const void *)'
     905 |                                  int (*match)(struct device *dev, void *data));
         |                                  ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/device_find_child +2670 drivers/spi/spi.c

  2662	
  2663	static ssize_t slave_show(struct device *dev, struct device_attribute *attr,
  2664				  char *buf)
  2665	{
  2666		struct spi_controller *ctlr = container_of(dev, struct spi_controller,
  2667							   dev);
  2668		struct device *child;
  2669	
> 2670		child = device_find_child(&ctlr->dev, NULL, device_match_any);
  2671		return sprintf(buf, "%s\n",
  2672			       child ? to_spi_device(child)->modalias : NULL);
  2673	}
  2674	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp