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Miller" Cc: linux-s390@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org References: <20230707105622.3332261-1-schnelle@linux.ibm.com> <20230707105622.3332261-2-schnelle@linux.ibm.com> Content-Language: en-US From: Alexandra Winter In-Reply-To: <20230707105622.3332261-2-schnelle@linux.ibm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: qjk6yNTpRQAXkbSGQ48l1KT7E9o8tBpo X-Proofpoint-ORIG-GUID: 1ZdOLnMmS0jK4qfCZt1mmuDNPF8E4ZF7 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-07-07_09,2023-07-06_02,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 malwarescore=0 spamscore=0 mlxscore=0 adultscore=0 phishscore=0 clxscore=1015 impostorscore=0 priorityscore=1501 mlxlogscore=999 lowpriorityscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2305260000 definitions=main-2307070125 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_EF,NICE_REPLY_A,RCVD_IN_MSPIKE_H5, RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 07.07.23 12:56, Niklas Schnelle wrote: [...] > Instead of expanding the use of the clients_lock further add a separate > array in struct ism_dev which references clients subscribed to the > device's events and IRQs. This array is protected by ism->lock which is > already taken in ism_handle_irq() and can be taken outside the IRQ > handler when adding/removing subscribers or the accessing typo? s/the accessing/accessing the/g > ism->sba_client_arr[]. This also means that the clients_lock is no > longer taken in IRQ context. > [...] > @@ -554,6 +577,7 @@ static void ism_dev_add_work_func(struct work_struct *work) > add_work); > > client->add(client->tgt_ism); > + ism_setup_forwarding(client, client->tgt_ism); > atomic_dec(&client->tgt_ism->add_dev_cnt); > wake_up(&client->tgt_ism->waitq); > } > @@ -691,7 +715,11 @@ static void ism_dev_remove_work_func(struct work_struct *work) > { > struct ism_client *client = container_of(work, struct ism_client, > remove_work); > + unsigned long flags; > > + spin_lock_irqsave(&client->tgt_ism->lock, flags); > + client->tgt_ism->subs[client->id] = NULL; > + spin_unlock_irqrestore(&client->tgt_ism->lock, flags); > client->remove(client->tgt_ism); > atomic_dec(&client->tgt_ism->free_clients_cnt); > wake_up(&client->tgt_ism->waitq); I am not sure I like the new split. here you fix ism_dev_add_work_func() and ism_dev_remove_work_func(), that you remove in the next patch. But looks functionally ok to me. Reviewed-by: Alexandra Winter