From: Zhouyang Jia <jiazhouyang09@gmail.com> To: unlisted-recipients:; (no To-header on input) Cc: Zhouyang Jia <jiazhouyang09@gmail.com>, QLogic-Storage-Upstream@qlogic.com, "James E.J. Bottomley" <jejb@linux.vnet.ibm.com>, "Martin K. Petersen" <martin.petersen@oracle.com>, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] scsi: qla4xxx: add error handling for try_module_get Date: Tue, 12 Jun 2018 12:48:29 +0800 [thread overview] Message-ID: <1528778910-42113-1-git-send-email-jiazhouyang09@gmail.com> (raw) When try_module_get fails, the lack of error-handling code may cause unexpected results. This patch adds error-handling code after calling try_module_get. Signed-off-by: Zhouyang Jia <jiazhouyang09@gmail.com> --- drivers/scsi/qla4xxx/ql4_os.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c index 0e13349..6b677ab 100644 --- a/drivers/scsi/qla4xxx/ql4_os.c +++ b/drivers/scsi/qla4xxx/ql4_os.c @@ -7687,7 +7687,10 @@ static int qla4xxx_sysfs_ddb_logout_sid(struct iscsi_cls_session *cls_sess) * to be seamless without actually destroying the * session **/ - try_module_get(qla4xxx_iscsi_transport.owner); + if (!try_module_get(qla4xxx_iscsi_transport.owner)) + ql4_printk(KERN_WARNING, ha, + "%s: cannot get module.\n", __func__); + iscsi_destroy_endpoint(ddb_entry->conn->ep); spin_lock_irqsave(&ha->hardware_lock, flags); @@ -8970,7 +8973,9 @@ static void qla4xxx_destroy_fw_ddb_session(struct scsi_qla_host *ha) * to be seamless without actually destroying the * session **/ - try_module_get(qla4xxx_iscsi_transport.owner); + if (!try_module_get(qla4xxx_iscsi_transport.owner)) + ql4_printk(KERN_WARNING, ha, + "%s: cannot get module.\n", __func__); iscsi_destroy_endpoint(ddb_entry->conn->ep); qla4xxx_free_ddb(ha, ddb_entry); iscsi_session_teardown(ddb_entry->sess); -- 2.7.4
WARNING: multiple messages have this Message-ID (diff)
From: Zhouyang Jia <jiazhouyang09@gmail.com> Cc: Zhouyang Jia <jiazhouyang09@gmail.com>, QLogic-Storage-Upstream@qlogic.com, "James E.J. Bottomley" <jejb@linux.vnet.ibm.com>, "Martin K. Petersen" <martin.petersen@oracle.com>, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] scsi: qla4xxx: add error handling for try_module_get Date: Tue, 12 Jun 2018 12:48:29 +0800 [thread overview] Message-ID: <1528778910-42113-1-git-send-email-jiazhouyang09@gmail.com> (raw) When try_module_get fails, the lack of error-handling code may cause unexpected results. This patch adds error-handling code after calling try_module_get. Signed-off-by: Zhouyang Jia <jiazhouyang09@gmail.com> --- drivers/scsi/qla4xxx/ql4_os.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c index 0e13349..6b677ab 100644 --- a/drivers/scsi/qla4xxx/ql4_os.c +++ b/drivers/scsi/qla4xxx/ql4_os.c @@ -7687,7 +7687,10 @@ static int qla4xxx_sysfs_ddb_logout_sid(struct iscsi_cls_session *cls_sess) * to be seamless without actually destroying the * session **/ - try_module_get(qla4xxx_iscsi_transport.owner); + if (!try_module_get(qla4xxx_iscsi_transport.owner)) + ql4_printk(KERN_WARNING, ha, + "%s: cannot get module.\n", __func__); + iscsi_destroy_endpoint(ddb_entry->conn->ep); spin_lock_irqsave(&ha->hardware_lock, flags); @@ -8970,7 +8973,9 @@ static void qla4xxx_destroy_fw_ddb_session(struct scsi_qla_host *ha) * to be seamless without actually destroying the * session **/ - try_module_get(qla4xxx_iscsi_transport.owner); + if (!try_module_get(qla4xxx_iscsi_transport.owner)) + ql4_printk(KERN_WARNING, ha, + "%s: cannot get module.\n", __func__); iscsi_destroy_endpoint(ddb_entry->conn->ep); qla4xxx_free_ddb(ha, ddb_entry); iscsi_session_teardown(ddb_entry->sess); -- 2.7.4
next reply other threads:[~2018-06-12 4:48 UTC|newest] Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-06-12 4:48 Zhouyang Jia [this message] 2018-06-12 4:48 ` [PATCH] scsi: qla4xxx: add error handling for try_module_get Zhouyang Jia 2018-06-12 7:52 ` Rangankar, Manish 2018-06-12 7:52 ` Rangankar, Manish 2018-06-12 14:08 ` James Bottomley
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=1528778910-42113-1-git-send-email-jiazhouyang09@gmail.com \ --to=jiazhouyang09@gmail.com \ --cc=QLogic-Storage-Upstream@qlogic.com \ --cc=jejb@linux.vnet.ibm.com \ --cc=linux-kernel@vger.kernel.org \ --cc=linux-scsi@vger.kernel.org \ --cc=martin.petersen@oracle.com \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.