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lpfc: fix races for miscdevice open vs. rmmod 

mind you, I'm not sure WTF would anybody _need_ that miscdevice
at all - no IO is possible for it, opening it only pins the module
down and is seriously racy, at that.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2013-04-14 22:39:37 -04:00
parent 3dce1891f3
commit 858feacd2b
1 changed files with 1 additions and 32 deletions
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33
drivers/scsi/lpfc/lpfc_init.c
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@ -10368,36 +10368,6 @@ lpfc_io_resume(struct pci_dev *pdev)
return;
}
/**
* lpfc_mgmt_open - method called when 'lpfcmgmt' is opened from userspace
* @inode: pointer to the inode representing the lpfcmgmt device
* @filep: pointer to the file representing the open lpfcmgmt device
*
* This routine puts a reference count on the lpfc module whenever the
* character device is opened
**/
static int
lpfc_mgmt_open(struct inode *inode, struct file *filep)
{
try_module_get(THIS_MODULE);
return 0;
}
/**
* lpfc_mgmt_release - method called when 'lpfcmgmt' is closed in userspace
* @inode: pointer to the inode representing the lpfcmgmt device
* @filep: pointer to the file representing the open lpfcmgmt device
*
* This routine removes a reference count from the lpfc module when the
* character device is closed
**/
static int
lpfc_mgmt_release(struct inode *inode, struct file *filep)
{
module_put(THIS_MODULE);
return 0;
}
static struct pci_device_id lpfc_id_table[] = {
{PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_VIPER,
PCI_ANY_ID, PCI_ANY_ID, },
@ -10515,8 +10485,7 @@ static struct pci_driver lpfc_driver = {
};
static const struct file_operations lpfc_mgmt_fop = {
.open = lpfc_mgmt_open,
.release = lpfc_mgmt_release,
.owner = THIS_MODULE,
};
static struct miscdevice lpfc_mgmt_dev = {