From: Al Viro Date: Mon, 15 Apr 2013 02:39:37 +0000 (-0400) Subject: lpfc: fix races for miscdevice open vs. rmmod X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=858feacd2b6790c49ba9c7521f0c7ac3a5a9cb8e;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git 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 --- diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c index 314b4f61b9e3..8b9c191a7019 100644 --- a/drivers/scsi/lpfc/lpfc_init.c +++ b/drivers/scsi/lpfc/lpfc_init.c @@ -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 = {