[PATCH] ZEN: fix platform_no_drv_owner.cocci warnings

[PATCH] ZEN: fix platform_no_drv_owner.cocci warnings

[Julia Lawall]

From: kbuild test robot <lkp@intel.com>

Remove .owner field if calls are used which set it automatically

Generated by: scripts/coccinelle/api/platform_no_drv_owner.cocci

Fixes: 26e2aa63d568 ("ZEN: Add VHBA driver")
Signed-off-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Julia Lawall <julia.lawall@lip6.fr>

---

There was also a report about:

drivers/scsi/vhba/vhba.c:184:8-27: atomic_dec_and_test variation before
object free at line 185.

that Elena may want to comment on.


tree:   https://github.com/zen-kernel/zen-kernel 5.0/misc
head:   5fbf87816fba5c14168bf5a8cf2205e072bac88f
commit: 26e2aa63d568ec48e0c062637ed5e3ca44b492e2 [7/18] ZEN: Add VHBA driver
:::::: branch date: 4 hours ago
:::::: commit date: 6 weeks ago

 vhba.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/scsi/vhba/vhba.c
+++ b/drivers/scsi/vhba/vhba.c
@@ -1033,7 +1033,6 @@ static struct platform_device vhba_platf

 static struct platform_driver vhba_platform_driver = {
     .driver = {
-        .owner = THIS_MODULE,
         .name = "vhba",
     },
     .probe = vhba_probe,

RE: [PATCH] ZEN: fix platform_no_drv_owner.cocci warnings

[Reshetova, Elena]

> From: kbuild test robot <lkp@intel.com>
> 
> Remove .owner field if calls are used which set it automatically
> 
> Generated by: scripts/coccinelle/api/platform_no_drv_owner.cocci
> 
> Fixes: 26e2aa63d568 ("ZEN: Add VHBA driver")
> Signed-off-by: kbuild test robot <lkp@intel.com>
> Signed-off-by: Julia Lawall <julia.lawall@lip6.fr>
> 
> ---
> 
> There was also a report about:
> 
> drivers/scsi/vhba/vhba.c:184:8-27: atomic_dec_and_test variation before
> object free at line 185.
> 
> that Elena may want to comment on.
> 
>

Yes, on a quick look it seems that you should be using refcount_t type and not
atomic_t for your reference counter, as you use it as classical refcounter, i.e. 
free  the object upon reaching zero, etc:

static void vhba_device_put (struct vhba_device *vdev)
{
    if (atomic_dec_and_test(&vdev->refcnt)) {
        kfree(vdev);
    }
}

Any reason why you didn't use refcount_t type to begin with?

Best Regards,
Elena.