[SCSI] megaraid_sas: Move poll_aen_lock initializer

The following patch moves the poll_aen_lock initializer from
megasas_probe_one() to megasas_init().  This prevents a crash when a user
loads the driver and tries to issue a poll() system call on the ioctl
interface with no adapters present.

Signed-off-by: Kashyap Desai <Kashyap.Desai@lsi.com>
Signed-off-by: Adam Radford <aradford@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
index dc27598785e5..ed38454228c6 100644
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -4066,7 +4066,6 @@ megasas_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
         spin_lock_init(&instance->cmd_pool_lock);
         spin_lock_init(&instance->hba_lock);
         spin_lock_init(&instance->completion_lock);
-        spin_lock_init(&poll_aen_lock);
 
         mutex_init(&instance->aen_mutex);
         mutex_init(&instance->reset_mutex);
@@ -5392,6 +5391,8 @@ static int __init megasas_init(void)
         printk(KERN_INFO "megasas: %s %s\n", MEGASAS_VERSION,
                MEGASAS_EXT_VERSION);
 
+        spin_lock_init(&poll_aen_lock);
+
         support_poll_for_event = 2;
         support_device_change = 1;