linux-kernel - Re: [PATCH v2] driver core: Simplify driver API device_find_child_by

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Message-ID: <5b971dcd-da54-45c4-854e-280417a6be2d@quicinc.com>
Date: Tue, 13 Aug 2024 18:11:05 +0800
From: quic_zijuhu <quic_zijuhu@...cinc.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Zijun Hu
	<zijun_hu@...oud.com>
CC: "Rafael J. Wysocki" <rafael@...nel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] driver core: Simplify driver API
 device_find_child_by_name() implementation

On 8/13/2024 5:41 PM, Greg Kroah-Hartman wrote:
> On Sun, Aug 11, 2024 at 01:49:58PM +0800, Zijun Hu wrote:
>> From: Zijun Hu <quic_zijuhu@...cinc.com>
>>
>> Simplify device_find_child_by_name() implementation by using existing
>> driver APIs device_find_child() and device_match_name().
>>
>> Signed-off-by: Zijun Hu <quic_zijuhu@...cinc.com>
>> ---
>> Changes in v2:
>> - Correct commit message and remove all unnecessary comments and codes
>> - Link to v1: https://lore.kernel.org/lkml/20240720-simplify_drv_api-v1-1-07c5e028cccf@quicinc.com
>> ---
>>  drivers/base/core.c | 13 +------------
>>  1 file changed, 1 insertion(+), 12 deletions(-)
>>
>> diff --git a/drivers/base/core.c b/drivers/base/core.c
>> index f152e0f8fb03..8ed593d7e0be 100644
>> --- a/drivers/base/core.c
>> +++ b/drivers/base/core.c
>> @@ -4093,18 +4093,7 @@ EXPORT_SYMBOL_GPL(device_find_child);
>>  struct device *device_find_child_by_name(struct device *parent,
>>  					 const char *name)
>>  {
>> -	struct klist_iter i;
>> -	struct device *child;
>> -
>> -	if (!parent)
>> -		return NULL;
>> -
>> -	klist_iter_init(&parent->p->klist_children, &i);
>> -	while ((child = next_device(&i)))
>> -		if (sysfs_streq(dev_name(child), name) && get_device(child))
>> -			break;
>> -	klist_iter_exit(&i);
>> -	return child;
>> +	return device_find_child(parent, name, device_match_name);
>>  }
>>  EXPORT_SYMBOL_GPL(device_find_child_by_name);
>>  
>>
>> ---
>> base-commit: bfa54a793ba77ef696755b66f3ac4ed00c7d1248
>> change-id: 20240811-simply_api_dfcbn-eebeb153bec7
>> prerequisite-change-id: 20240811-const_dfc_done-c5c206675c6b:v1
>> prerequisite-patch-id: 475b810c1ccacab955c654c223d5214f70c4f6c8
>> prerequisite-patch-id: 81a5ccaa144a7732cae29fc5ea1a13426becee5b
>> prerequisite-patch-id: 9b77254186b7366809f949f5643f9437fa2528a0
>> prerequisite-patch-id: 95308bb3eedcf8c4a5e30aa3071116148495329e
>> prerequisite-patch-id: ee643a52674e2aead02f7be3d011d88507970436
>> prerequisite-patch-id: 0625de1f03ef4350b1828f0faff7a9d9bdebae94
>> prerequisite-patch-id: 6e671f2891f6ed906a35e0a90b5d8cd71c382b9c
>> prerequisite-patch-id: 8859b6fa330c363ef37567fc0a5421c0b9ecd8dc
>> prerequisite-patch-id: fe9aa57807bbb8b98dba32abd614d8f2e27565cd
>> prerequisite-patch-id: d03febd9c0afd5d21a2f664d748da7d7811a8e84
>> prerequisite-patch-id: c7425de06cf7032d54ff72f610d7632941be976e
>> prerequisite-patch-id: 54c942a1a492ba04480337f99dc901a8d4def782
>> prerequisite-patch-id: 7e8f4a3e378d5329b886a9a3719add3cbb10e3e3
>> prerequisite-patch-id: 34ff831994ac7bc265f567bacefff8ae687ccd40
>> prerequisite-patch-id: 66d46c755c25065e9d440a4137e1e8ccc245e0be
>> prerequisite-patch-id: 15bc81129ee07324b5a8faa39a5e6aea59952573
>> prerequisite-patch-id: fe9ca6ae244761b48469f375fe1fc8c9c7b24204
>> prerequisite-patch-id: a6fd24b37269a06a91fd926fa5111a19cdec7551
>> prerequisite-patch-id: 2f584b03145bc7d01e3ea632c6abb89d3b543d93
>> prerequisite-patch-id: 10e0d06e0340ce5028cd109fffa7f0720c70d242
>> prerequisite-patch-id: 0f9ea4a7c63d15c5c1324c5666901f0704c129ca
>> prerequisite-patch-id: 4f56ebd28ae00a50130f58409d934ca79ccec6a9
>> prerequisite-patch-id: 70e7432951b43a67204bb7eb6c437ba135def0f1
>> prerequisite-patch-id: 1718891e69e1d2031336b4a6e7f251c50619f336
>> prerequisite-patch-id: 5f838fb00256dbadfd36735ef3a1b1e43ec20549
>> prerequisite-patch-id: f4b36e4136d462c8ba9f94f777a6fa1a054b8809
>> prerequisite-patch-id: 56c12ce5dc6bfb090fa7801fa3f31c4e52b50775
>> prerequisite-patch-id: 2b23c8c2ae90030a59d267297b478584447b78ac
>> prerequisite-patch-id: 294c325d517e318063c61af218607d9721f1cc5f
>> prerequisite-patch-id: 38fb282ac119a88af58a88b38c9cdc74372df404
>> prerequisite-patch-id: d3ab2693194b77403d6ce20edf25ee3896d0260b
>> prerequisite-patch-id: 19b69184800129923777ee2acd2629565c69291b
>> prerequisite-patch-id: f58374cebf0ada070fc0825736424dd177e49676
> 
> As those ids are not going to be in my tree (or anyone else's), how are
> we supposed to apply this?
> 
> confused,
> 

Hi Greg,

ALL these patches are based on your driver-core tree with branch
driver-core-next.

these ids are patches which are not merged yet and this change depends
on, they are automatically generated by tool b4.

the following command will apply ALL:
b4 shazam -C --check
20240811-simply_api_dfcbn-v2-1-d0398acdc366@...cinc.com
> greg k-h