From 65c054f235fda2d545ecd2a7948906a3cf0c1f39 Mon Sep 17 00:00:00 2001 From: Kei Tokunaga Date: Mon, 15 Mar 2010 14:48:43 +0900 Subject: [PATCH] [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 Acked-by: "Desai, Kashyap" Signed-off-by: James Bottomley --- drivers/message/fusion/mptctl.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/drivers/message/fusion/mptctl.c b/drivers/message/fusion/mptctl.c index caa8f568a41..80421d2cf04 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); -- 2.39.5