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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Thu, 10 Jan 2019 14:56:58 -0000 Received: from b03ledav006.gho.boulder.ibm.com (b03ledav006.gho.boulder.ibm.com [9.17.130.237]) by b03cxnp08027.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x0AEuvXO18350152 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 10 Jan 2019 14:56:57 GMT Received: from b03ledav006.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2B885C605F; Thu, 10 Jan 2019 14:56:57 +0000 (GMT) Received: from b03ledav006.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E6857C6063; Thu, 10 Jan 2019 14:56:56 +0000 (GMT) Received: from oc6034535106.ibm.com (unknown [9.10.86.125]) by b03ledav006.gho.boulder.ibm.com (Postfix) with ESMTP; Thu, 10 Jan 2019 14:56:56 +0000 (GMT) Subject: Re: [PATCH] ibmvscsi: use GFP_KERNEL with dma_alloc_coherent in initialize_event_pool To: Tyrel Datwyler , james.bottomley@hansenpartnership.com References: <1547089149-20577-1-git-send-email-tyreld@linux.vnet.ibm.com> From: Brian King Date: Thu, 10 Jan 2019 08:56:56 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <1547089149-20577-1-git-send-email-tyreld@linux.vnet.ibm.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 x-cbid: 19011014-0016-0000-0000-00000972C57A X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00010379; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000274; SDB=6.01144486; UDB=6.00595915; IPR=6.00924750; MB=3.00025068; MTD=3.00000008; XFM=3.00000015; UTC=2019-01-10 14:57:00 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19011014-0017-0000-0000-000041B85172 Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-01-10_05:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1901100118 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linuxppc-dev@lists.ozlabs.org, linux-scsi@vger.kernel.org, martin.petersen@oracle.com Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On 01/09/2019 08:59 PM, Tyrel Datwyler wrote: > During driver probe we allocate a dma region for our event pool. > Currently, zero is passed for the gfp_flags parameter. Driver probe > callbacks run in process context and we hold no locks so we can sleep > here if necessary. > > Fix by passing GFP_KERNEL explicitly to dma_alloc_coherent(). > > Signed-off-by: Tyrel Datwyler > --- > drivers/scsi/ibmvscsi/ibmvscsi.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c b/drivers/scsi/ibmvscsi/ibmvscsi.c > index cb8535e..10d5e77 100644 > --- a/drivers/scsi/ibmvscsi/ibmvscsi.c > +++ b/drivers/scsi/ibmvscsi/ibmvscsi.c > @@ -465,7 +465,7 @@ static int initialize_event_pool(struct event_pool *pool, > pool->iu_storage = > dma_alloc_coherent(hostdata->dev, > pool->size * sizeof(*pool->iu_storage), > - &pool->iu_token, 0); > + &pool->iu_token, GFP_KERNEL); > if (!pool->iu_storage) { > kfree(pool->events); > return -ENOMEM; > Reviewed-by: Brian King -- Brian King Power Linux I/O IBM Linux Technology Center