Re: [PATCH v2] ufs: core: Add WB buffer resize support

[kernel test robot]

Hi Huan,

kernel test robot noticed the following build errors:

[auto build test ERROR on jejb-scsi/for-next]
[also build test ERROR on mkp-scsi/for-next linus/master v6.12-rc4 next-20241025]
[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/Huan-Tang/ufs-core-Add-WB-buffer-resize-support/20241026-084545
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi.git for-next
patch link:    https://lore.kernel.org/r/20241026004423.135-1-tanghuan%40vivo.com
patch subject: [PATCH v2] ufs: core: Add WB buffer resize support
config: i386-randconfig-141-20241026 (https://download.01.org/0day-ci/archive/20241027/202410270024.rwb7xAgC-lkp@xxxxxxxxx/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241027/202410270024.rwb7xAgC-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202410270024.rwb7xAgC-lkp@xxxxxxxxx/

All errors (new ones prefixed by >>):

   drivers/ufs/core/ufs-sysfs.c: In function 'wb_toggle_buf_resize_store':
>> drivers/ufs/core/ufs-sysfs.c:441:9: error: 'index' undeclared (first use in this function)
     441 |         index = ufshcd_wb_get_query_index(hba);
         |         ^~~~~
   drivers/ufs/core/ufs-sysfs.c:441:9: note: each undeclared identifier is reported only once for each function it appears in

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 [=y]


vim +/index +441 drivers/ufs/core/ufs-sysfs.c

   413	
   414	static ssize_t wb_toggle_buf_resize_store(struct device *dev,
   415			struct device_attribute *attr, const char *buf, size_t count)
   416	{
   417		struct ufs_hba *hba = dev_get_drvdata(dev);
   418		unsigned int wb_buf_resize_op;
   419		ssize_t res;
   420	
   421		if (!ufshcd_is_wb_allowed(hba) || !hba->dev_info.wb_enabled ||
   422			!hba->dev_info.b_presrv_uspc_en) {
   423			dev_err(dev, "The WB buf resize is not allowed!\n");
   424			return -EOPNOTSUPP;
   425		}
   426	
   427		if (kstrtouint(buf, 0, &wb_buf_resize_op))
   428			return -EINVAL;
   429	
   430		if (wb_buf_resize_op != 0x01 && wb_buf_resize_op != 0x02) {
   431			dev_err(dev, "The operation %u is invalid!\n", wb_buf_resize_op);
   432			return -EINVAL;
   433		}
   434	
   435		down(&hba->host_sem);
   436		if (!ufshcd_is_user_access_allowed(hba)) {
   437			res = -EBUSY;
   438			goto out;
   439		}
   440	
 > 441		index = ufshcd_wb_get_query_index(hba);
   442		ufshcd_rpm_get_sync(hba);
   443		res = ufshcd_wb_toggle_buf_resize(hba, wb_buf_resize_op);
   444		ufshcd_rpm_put_sync(hba);
   445	
   446	out:
   447		up(&hba->host_sem);
   448		return res < 0 ? res : count;
   449	}
   450	

-- 
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https://github.com/intel/lkp-tests/wiki