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authorKei Tokunaga <tokunaga.keiich@jp.fujitsu.com>2010-03-15 14:48:43 +0900
committerJames Bottomley <James.Bottomley@suse.de>2010-04-11 09:23:45 -0500
commit65c054f235fda2d545ecd2a7948906a3cf0c1f39 (patch)
treeb8782ce4208432df2336730a57dd427d620f2d1e /drivers/message
parentf018b73af6db4f330ad5da9ac53997a699c30c42 (diff)
[SCSI] mpt: modify mptctl_exit() to call proper deregister functions
This patch fixes some issues of mptctl_exit(). 1) It doesn't call mpt_deregister() for mptctl_taskmgmt_id => Insmoding/rmmoding mptctl.ko repeadtedly (up to MPT_MAX_PROTOCOL_DRIVERS-1 at most) can eat up all cb_idx, and that would cause a lack of MptCallbacks[], MptDriverClass[], and MptEvHandlers[]. 2) It doesn't call mpt_event_deregister() for mptctl_id => Need to call it. 3) It calls mpt_reset_deregister() for mptctl_taskmgmt_id => This could accidentally deregister an innocent reset handler that you don't want to. This patch also adds a check for mptctl_taskmgmt_id. Signed-off-by: Kei Tokunaga <tokunaga.keiich@jp.fujitsu.com> Acked-by: "Desai, Kashyap" <Kashyap.Desai@lsi.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/message')
-rw-r--r--drivers/message/fusion/mptctl.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/message/fusion/mptctl.c b/drivers/message/fusion/mptctl.c
index caa8f568a41c..80421d2cf049 100644
--- a/drivers/message/fusion/mptctl.c
+++ b/drivers/message/fusion/mptctl.c
@@ -2991,6 +2991,14 @@ static int __init mptctl_init(void)
}
mptctl_taskmgmt_id = mpt_register(mptctl_taskmgmt_reply, MPTCTL_DRIVER);
+ if (!mptctl_taskmgmt_id || mptctl_taskmgmt_id >= MPT_MAX_PROTOCOL_DRIVERS) {
+ printk(KERN_ERR MYNAM ": ERROR: Failed to register with Fusion MPT base driver\n");
+ mpt_deregister(mptctl_id);
+ misc_deregister(&mptctl_miscdev);
+ err = -EBUSY;
+ goto out_fail;
+ }
+
mpt_reset_register(mptctl_id, mptctl_ioc_reset);
mpt_event_register(mptctl_id, mptctl_event_process);
@@ -3010,12 +3018,15 @@ static void mptctl_exit(void)
printk(KERN_INFO MYNAM ": Deregistered /dev/%s @ (major,minor=%d,%d)\n",
mptctl_miscdev.name, MISC_MAJOR, mptctl_miscdev.minor);
+ /* De-register event handler from base module */
+ mpt_event_deregister(mptctl_id);
+
/* De-register reset handler from base module */
mpt_reset_deregister(mptctl_id);
/* De-register callback handler from base module */
+ mpt_deregister(mptctl_taskmgmt_id);
mpt_deregister(mptctl_id);
- mpt_reset_deregister(mptctl_taskmgmt_id);
mpt_device_driver_deregister(MPTCTL_DRIVER);