Most error branches following the call to pmcraid_get_free_cmd contain
a call to pmcraid_return_cmd. This patch add these calls where they are
missing.

Moreover, most error branches following the call to class_create contain
a call to class_destroy. This patch add these calls where they are
missing.

This issue was found with Hector.

Signed-off-by: Quentin Lambert <lambert.quen...@gmail.com>

---
 drivers/scsi/pmcraid.c |   10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

--- a/drivers/scsi/pmcraid.c
+++ b/drivers/scsi/pmcraid.c
@@ -3787,11 +3787,11 @@ static long pmcraid_ioctl_passthrough(
                                                      direction);
                if (rc) {
                        pmcraid_err("couldn't build passthrough ioadls\n");
-                       goto out_free_buffer;
+                       goto out_free_cmd;
                }
        } else if (request_size < 0) {
                rc = -EINVAL;
-               goto out_free_buffer;
+               goto out_free_cmd;
        }
 
        /* If data is being written into the device, copy the data from user
@@ -3908,6 +3908,8 @@ out_handle_response:
 
 out_free_sglist:
        pmcraid_release_passthrough_ioadls(cmd, request_size, direction);
+
+out_free_cmd:
        pmcraid_return_cmd(cmd);
 
 out_free_buffer:
@@ -6018,8 +6020,10 @@ static int __init pmcraid_init(void)
 
        error = pmcraid_netlink_init();
 
-       if (error)
+       if (error) {
+               class_destroy(pmcraid_class);
                goto out_unreg_chrdev;
+       }
 
        error = pci_register_driver(&pmcraid_driver);
 
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