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Tue, 30 Jan 2024 09:49:55 +0000 (UTC) Received: from dovecot-director2.suse.de ([10.150.64.162]) by imap2.dmz-prg2.suse.org with ESMTPSA id Wqn3H0PGuGWlbwAAn2gu4w (envelope-from ); Tue, 30 Jan 2024 09:49:55 +0000 From: Daniel Wagner To: James Smart Cc: Keith Busch , Christoph Hellwig , Hannes Reinecke , linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org, Daniel Wagner Subject: [PATCH v4 12/12] nvmet-fc: use RCU list iterator for assoc_list Date: Tue, 30 Jan 2024 10:49:38 +0100 Message-ID: <20240130094938.1575-13-dwagner@suse.de> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240130094938.1575-1-dwagner@suse.de> References: <20240130094938.1575-1-dwagner@suse.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Authentication-Results: smtp-out1.suse.de; none X-Spamd-Result: default: False [0.90 / 50.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; R_MISSING_CHARSET(2.50)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; REPLY(-4.00)[]; BROKEN_CONTENT_TYPE(1.50)[]; R_RATELIMIT(0.00)[to_ip_from(RL7u6ok1g4a6hhe6aduz96x8er)]; RCVD_COUNT_THREE(0.00)[3]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; RCPT_COUNT_SEVEN(0.00)[7]; MID_CONTAINS_FROM(1.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:email]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_ALL(0.00)[]; BAYES_HAM(-0.00)[38.88%] X-Spam-Level: X-Spam-Flag: NO X-Spam-Score: 0.90 Content-Type: text/plain; charset="utf-8" The assoc_list is a RCU protected list, thus use the RCU flavor of list functions. Signed-off-by: Daniel Wagner --- drivers/nvme/target/fc.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/nvme/target/fc.c b/drivers/nvme/target/fc.c index 671d096745a5..b8d3e30f2ddb 100644 --- a/drivers/nvme/target/fc.c +++ b/drivers/nvme/target/fc.c @@ -1151,7 +1151,9 @@ nvmet_fc_alloc_target_assoc(struct nvmet_fc_tgtport *= tgtport, void *hosthandle) =20 spin_lock_irqsave(&tgtport->lock, flags); needrandom =3D false; - list_for_each_entry(tmpassoc, &tgtport->assoc_list, a_list) { + rcu_read_lock(); + list_for_each_entry_rcu(tmpassoc, &tgtport->assoc_list, a_list) { + if (ran =3D=3D tmpassoc->association_id) { needrandom =3D true; break; @@ -1161,6 +1163,7 @@ nvmet_fc_alloc_target_assoc(struct nvmet_fc_tgtport *= tgtport, void *hosthandle) assoc->association_id =3D ran; list_add_tail_rcu(&assoc->a_list, &tgtport->assoc_list); } + rcu_read_unlock(); spin_unlock_irqrestore(&tgtport->lock, flags); } =20 --=20 2.43.0