From patchwork Fri Dec 29 04:03:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guixin Liu X-Patchwork-Id: 13506318 Received: from out30-133.freemail.mail.aliyun.com (out30-133.freemail.mail.aliyun.com [115.124.30.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 29CAC23A4 for ; Fri, 29 Dec 2023 04:03:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.alibaba.com X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R691e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018045170;MF=kanie@linux.alibaba.com;NM=1;PH=DS;RN=8;SR=0;TI=SMTPD_---0VzQGD9z_1703822612; Received: from localhost(mailfrom:kanie@linux.alibaba.com fp:SMTPD_---0VzQGD9z_1703822612) by smtp.aliyun-inc.com; Fri, 29 Dec 2023 12:03:36 +0800 From: Guixin Liu To: sathya.prakash@broadcom.com, kashyap.desai@broadcom.com, sumit.saxena@broadcom.com, sreekanth.reddy@broadcom.com, jejb@linux.ibm.com, martin.petersen@oracle.com Cc: mpi3mr-linuxdrv.pdl@broadcom.com, linux-scsi@vger.kernel.org Subject: [PATCH V2] scsi: mpi3mr: use ida to manage mrioc's id Date: Fri, 29 Dec 2023 12:03:31 +0800 Message-ID: <20231229040331.52518-1-kanie@linux.alibaba.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 To ensure that the same id is not obtained during concurrent execution of the probe, an ida is used to manage the mrioc's id. Signed-off-by: Guixin Liu Reviewed-by: Lee Duncan Reviewed-by: Martin Wilck --- Changes from v1 to v2: - change id from int to u8, and use ida_alloc_range instead of ida_alloc. drivers/scsi/mpi3mr/mpi3mr_os.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/mpi3mr/mpi3mr_os.c b/drivers/scsi/mpi3mr/mpi3mr_os.c index 040031eb0c12..36c4ab679094 100644 --- a/drivers/scsi/mpi3mr/mpi3mr_os.c +++ b/drivers/scsi/mpi3mr/mpi3mr_os.c @@ -8,11 +8,12 @@ */ #include "mpi3mr.h" +#include /* global driver scop variables */ LIST_HEAD(mrioc_list); DEFINE_SPINLOCK(mrioc_list_lock); -static int mrioc_ids; +static DEFINE_IDA(mrioc_ida); static int warn_non_secure_ctlr; atomic64_t event_counter; @@ -5060,7 +5061,10 @@ mpi3mr_probe(struct pci_dev *pdev, const struct pci_device_id *id) } mrioc = shost_priv(shost); - mrioc->id = mrioc_ids++; + retval = ida_alloc_range(&mrioc_ida, 1, U8_MAX, GFP_KERNEL); + if (retval < 0) + goto id_alloc_failed; + mrioc->id = (u8)retval; sprintf(mrioc->driver_name, "%s", MPI3MR_DRIVER_NAME); sprintf(mrioc->name, "%s%d", mrioc->driver_name, mrioc->id); INIT_LIST_HEAD(&mrioc->list); @@ -5207,9 +5211,11 @@ mpi3mr_probe(struct pci_dev *pdev, const struct pci_device_id *id) resource_alloc_failed: destroy_workqueue(mrioc->fwevt_worker_thread); fwevtthread_failed: + ida_free(&mrioc_ida, mrioc->id); spin_lock(&mrioc_list_lock); list_del(&mrioc->list); spin_unlock(&mrioc_list_lock); +id_alloc_failed: scsi_host_put(shost); shost_failed: return retval; @@ -5295,6 +5301,7 @@ static void mpi3mr_remove(struct pci_dev *pdev) mrioc->sas_hba.num_phys = 0; } + ida_free(&mrioc_ida, mrioc->id); spin_lock(&mrioc_list_lock); list_del(&mrioc->list); spin_unlock(&mrioc_list_lock); @@ -5502,6 +5509,7 @@ static void __exit mpi3mr_exit(void) &driver_attr_event_counter); pci_unregister_driver(&mpi3mr_pci_driver); sas_release_transport(mpi3mr_transport_template); + ida_destroy(&mrioc_ida); } module_init(mpi3mr_init);