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Mon, 13 Sep 2021 12:19:39 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9D3D811C069; Mon, 13 Sep 2021 12:19:38 +0000 (GMT) Received: from [9.145.51.25] (unknown [9.145.51.25]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 13 Sep 2021 12:19:38 +0000 (GMT) Subject: Re: [PATCH 6/9] s390/block/dasd_genhd: add error handling support for add_disk() From: =?UTF-8?Q?Jan_H=c3=b6ppner?= To: Luis Chamberlain , axboe@kernel.dk, gregkh@linuxfoundation.org, chaitanya.kulkarni@wdc.com, atulgopinathan@gmail.com, hare@suse.de, maximlevitsky@gmail.com, oakad@yahoo.com, ulf.hansson@linaro.org, colin.king@canonical.com, shubhankarvk@gmail.com, baijiaju1990@gmail.com, trix@redhat.com, dongsheng.yang@easystack.cn, ceph-devel@vger.kernel.org, miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com, sth@linux.ibm.com, hca@linux.ibm.com, gor@linux.ibm.com, borntraeger@de.ibm.com, oberpar@linux.ibm.com, tj@kernel.org Cc: linux-s390@vger.kernel.org, linux-mtd@lists.infradead.org, linux-mmc@vger.kernel.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org References: <20210902174105.2418771-1-mcgrof@kernel.org> <20210902174105.2418771-7-mcgrof@kernel.org> Message-ID: Date: Mon, 13 Sep 2021 14:19:38 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: gi0m7LOuzf2vMdtL1hb1AAbX0QKyIfvS X-Proofpoint-ORIG-GUID: dBdYHCxX_EYkPQrzsDHcfwD3gZgwOseq X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.182.1,Aquarius:18.0.687,Hydra:6.0.235,FMLib:17.0.607.475 definitions=2020-10-13_15,2020-10-13_02,2020-04-07_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 impostorscore=0 mlxscore=0 lowpriorityscore=0 suspectscore=0 malwarescore=0 spamscore=0 clxscore=1015 mlxlogscore=999 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2109030001 definitions=main-2109130063 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On 13/09/2021 10:17, Jan Höppner wrote: > On 02/09/2021 19:41, Luis Chamberlain wrote: >> We never checked for errors on add_disk() as this function >> returned void. Now that this is fixed, use the shiny new >> error handling. >> >> Signed-off-by: Luis Chamberlain >> --- >> drivers/s390/block/dasd_genhd.c | 8 ++++++-- >> 1 file changed, 6 insertions(+), 2 deletions(-) >> >> diff --git a/drivers/s390/block/dasd_genhd.c b/drivers/s390/block/dasd_genhd.c >> index fa966e0db6ca..ba07022283bc 100644 >> --- a/drivers/s390/block/dasd_genhd.c >> +++ b/drivers/s390/block/dasd_genhd.c >> @@ -33,7 +33,7 @@ int dasd_gendisk_alloc(struct dasd_block *block) >> { >> struct gendisk *gdp; >> struct dasd_device *base; >> - int len; >> + int len, rc; >> >> /* Make sure the minor for this device exists. */ >> base = block->base; >> @@ -79,7 +79,11 @@ int dasd_gendisk_alloc(struct dasd_block *block) >> dasd_add_link_to_gendisk(gdp, base); >> block->gdp = gdp; >> set_capacity(block->gdp, 0); >> - device_add_disk(&base->cdev->dev, block->gdp, NULL); >> + >> + rc = device_add_disk(&base->cdev->dev, block->gdp, NULL); >> + if (rc) >> + return rc; >> + > > I think, just like with some of the other changes, there is some > cleanup required before returning. I'll prepare a patch and > come back to you. > It's actually just one call that is required. The patch should look like this: diff --git a/drivers/s390/block/dasd_genhd.c b/drivers/s390/block/dasd_genhd.c index fa966e0db6ca..80673dbfb1f9 100644 --- a/drivers/s390/block/dasd_genhd.c +++ b/drivers/s390/block/dasd_genhd.c @@ -33,7 +33,7 @@ int dasd_gendisk_alloc(struct dasd_block *block) { struct gendisk *gdp; struct dasd_device *base; - int len; + int len, rc; /* Make sure the minor for this device exists. */ base = block->base; @@ -79,7 +79,13 @@ int dasd_gendisk_alloc(struct dasd_block *block) dasd_add_link_to_gendisk(gdp, base); block->gdp = gdp; set_capacity(block->gdp, 0); - device_add_disk(&base->cdev->dev, block->gdp, NULL); + + rc = device_add_disk(&base->cdev->dev, block->gdp, NULL); + if (rc) { + dasd_gendisk_free(block); + return rc; + } + return 0; } regards, Jan From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.6 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 76A1BC433EF for ; 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Mon, 13 Sep 2021 12:19:38 +0000 (GMT) Received: from [9.145.51.25] (unknown [9.145.51.25]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 13 Sep 2021 12:19:38 +0000 (GMT) Subject: Re: [PATCH 6/9] s390/block/dasd_genhd: add error handling support for add_disk() From: =?UTF-8?Q?Jan_H=c3=b6ppner?= To: Luis Chamberlain , axboe@kernel.dk, gregkh@linuxfoundation.org, chaitanya.kulkarni@wdc.com, atulgopinathan@gmail.com, hare@suse.de, maximlevitsky@gmail.com, oakad@yahoo.com, ulf.hansson@linaro.org, colin.king@canonical.com, shubhankarvk@gmail.com, baijiaju1990@gmail.com, trix@redhat.com, dongsheng.yang@easystack.cn, ceph-devel@vger.kernel.org, miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com, sth@linux.ibm.com, hca@linux.ibm.com, gor@linux.ibm.com, borntraeger@de.ibm.com, oberpar@linux.ibm.com, tj@kernel.org Cc: linux-s390@vger.kernel.org, linux-mtd@lists.infradead.org, linux-mmc@vger.kernel.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org References: <20210902174105.2418771-1-mcgrof@kernel.org> <20210902174105.2418771-7-mcgrof@kernel.org> Message-ID: Date: Mon, 13 Sep 2021 14:19:38 +0200 User-Agent: Mozilla/5.0 (X11; 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charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org T24gMTMvMDkvMjAyMSAxMDoxNywgSmFuIEjDtnBwbmVyIHdyb3RlOgo+IE9uIDAyLzA5LzIwMjEg MTk6NDEsIEx1aXMgQ2hhbWJlcmxhaW4gd3JvdGU6Cj4+IFdlIG5ldmVyIGNoZWNrZWQgZm9yIGVy cm9ycyBvbiBhZGRfZGlzaygpIGFzIHRoaXMgZnVuY3Rpb24KPj4gcmV0dXJuZWQgdm9pZC4gTm93 IHRoYXQgdGhpcyBpcyBmaXhlZCwgdXNlIHRoZSBzaGlueSBuZXcKPj4gZXJyb3IgaGFuZGxpbmcu Cj4+Cj4+IFNpZ25lZC1vZmYtYnk6IEx1aXMgQ2hhbWJlcmxhaW4gPG1jZ3JvZkBrZXJuZWwub3Jn Pgo+PiAtLS0KPj4gIGRyaXZlcnMvczM5MC9ibG9jay9kYXNkX2dlbmhkLmMgfCA4ICsrKysrKy0t Cj4+ICAxIGZpbGUgY2hhbmdlZCwgNiBpbnNlcnRpb25zKCspLCAyIGRlbGV0aW9ucygtKQo+Pgo+ PiBkaWZmIC0tZ2l0IGEvZHJpdmVycy9zMzkwL2Jsb2NrL2Rhc2RfZ2VuaGQuYyBiL2RyaXZlcnMv czM5MC9ibG9jay9kYXNkX2dlbmhkLmMKPj4gaW5kZXggZmE5NjZlMGRiNmNhLi5iYTA3MDIyMjgz YmMgMTAwNjQ0Cj4+IC0tLSBhL2RyaXZlcnMvczM5MC9ibG9jay9kYXNkX2dlbmhkLmMKPj4gKysr IGIvZHJpdmVycy9zMzkwL2Jsb2NrL2Rhc2RfZ2VuaGQuYwo+PiBAQCAtMzMsNyArMzMsNyBAQCBp bnQgZGFzZF9nZW5kaXNrX2FsbG9jKHN0cnVjdCBkYXNkX2Jsb2NrICpibG9jaykKPj4gIHsKPj4g IAlzdHJ1Y3QgZ2VuZGlzayAqZ2RwOwo+PiAgCXN0cnVjdCBkYXNkX2RldmljZSAqYmFzZTsKPj4g LQlpbnQgbGVuOwo+PiArCWludCBsZW4sIHJjOwo+PiAgCj4+ICAJLyogTWFrZSBzdXJlIHRoZSBt aW5vciBmb3IgdGhpcyBkZXZpY2UgZXhpc3RzLiAqLwo+PiAgCWJhc2UgPSBibG9jay0+YmFzZTsK Pj4gQEAgLTc5LDcgKzc5LDExIEBAIGludCBkYXNkX2dlbmRpc2tfYWxsb2Moc3RydWN0IGRhc2Rf YmxvY2sgKmJsb2NrKQo+PiAgCWRhc2RfYWRkX2xpbmtfdG9fZ2VuZGlzayhnZHAsIGJhc2UpOwo+ PiAgCWJsb2NrLT5nZHAgPSBnZHA7Cj4+ICAJc2V0X2NhcGFjaXR5KGJsb2NrLT5nZHAsIDApOwo+ PiAtCWRldmljZV9hZGRfZGlzaygmYmFzZS0+Y2Rldi0+ZGV2LCBibG9jay0+Z2RwLCBOVUxMKTsK Pj4gKwo+PiArCXJjID0gZGV2aWNlX2FkZF9kaXNrKCZiYXNlLT5jZGV2LT5kZXYsIGJsb2NrLT5n ZHAsIE5VTEwpOwo+PiArCWlmIChyYykKPj4gKwkJcmV0dXJuIHJjOwo+PiArCj4gCj4gSSB0aGlu aywganVzdCBsaWtlIHdpdGggc29tZSBvZiB0aGUgb3RoZXIgY2hhbmdlcywgdGhlcmUgaXMgc29t ZQo+IGNsZWFudXAgcmVxdWlyZWQgYmVmb3JlIHJldHVybmluZy4gSSdsbCBwcmVwYXJlIGEgcGF0 Y2ggYW5kCj4gY29tZSBiYWNrIHRvIHlvdS4KPiAKCkl0J3MgYWN0dWFsbHkganVzdCBvbmUgY2Fs bCB0aGF0IGlzIHJlcXVpcmVkLiBUaGUgcGF0Y2ggc2hvdWxkCmxvb2sgbGlrZSB0aGlzOgoKZGlm ZiAtLWdpdCBhL2RyaXZlcnMvczM5MC9ibG9jay9kYXNkX2dlbmhkLmMgYi9kcml2ZXJzL3MzOTAv YmxvY2svZGFzZF9nZW5oZC5jCmluZGV4IGZhOTY2ZTBkYjZjYS4uODA2NzNkYmZiMWY5IDEwMDY0 NAotLS0gYS9kcml2ZXJzL3MzOTAvYmxvY2svZGFzZF9nZW5oZC5jCisrKyBiL2RyaXZlcnMvczM5 MC9ibG9jay9kYXNkX2dlbmhkLmMKQEAgLTMzLDcgKzMzLDcgQEAgaW50IGRhc2RfZ2VuZGlza19h bGxvYyhzdHJ1Y3QgZGFzZF9ibG9jayAqYmxvY2spCiB7CiAgICAgICAgc3RydWN0IGdlbmRpc2sg KmdkcDsKICAgICAgICBzdHJ1Y3QgZGFzZF9kZXZpY2UgKmJhc2U7Ci0gICAgICAgaW50IGxlbjsK KyAgICAgICBpbnQgbGVuLCByYzsKIAogICAgICAgIC8qIE1ha2Ugc3VyZSB0aGUgbWlub3IgZm9y IHRoaXMgZGV2aWNlIGV4aXN0cy4gKi8KICAgICAgICBiYXNlID0gYmxvY2stPmJhc2U7CkBAIC03 OSw3ICs3OSwxMyBAQCBpbnQgZGFzZF9nZW5kaXNrX2FsbG9jKHN0cnVjdCBkYXNkX2Jsb2NrICpi bG9jaykKICAgICAgICBkYXNkX2FkZF9saW5rX3RvX2dlbmRpc2soZ2RwLCBiYXNlKTsKICAgICAg ICBibG9jay0+Z2RwID0gZ2RwOwogICAgICAgIHNldF9jYXBhY2l0eShibG9jay0+Z2RwLCAwKTsK LSAgICAgICBkZXZpY2VfYWRkX2Rpc2soJmJhc2UtPmNkZXYtPmRldiwgYmxvY2stPmdkcCwgTlVM TCk7CisKKyAgICAgICByYyA9IGRldmljZV9hZGRfZGlzaygmYmFzZS0+Y2Rldi0+ZGV2LCBibG9j ay0+Z2RwLCBOVUxMKTsKKyAgICAgICBpZiAocmMpIHsKKyAgICAgICAgICAgICAgIGRhc2RfZ2Vu ZGlza19mcmVlKGJsb2NrKTsKKyAgICAgICAgICAgICAgIHJldHVybiByYzsKKyAgICAgICB9CisK ICAgICAgICByZXR1cm4gMDsKIH0KCnJlZ2FyZHMsCkphbgoKX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCkxpbnV4IE1URCBkaXNjdXNzaW9uIG1h aWxpbmcgbGlzdApodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xp bnV4LW10ZC8K