linux-kernel - [PATCH for-next] RDMA/core: Remove unnecessary statements

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Date:   Wed, 23 Feb 2022 15:49:01 +0800
From:   Yajun Deng <yajun.deng@...ux.dev>
To:     jgg@...dia.com
Cc:     linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org,
        Yajun Deng <yajun.deng@...ux.dev>
Subject: [PATCH for-next] RDMA/core: Remove unnecessary statements

The rdma_zalloc_drv_obj() in __ib_alloc_pd() would zero pd, it unnecessary
add NULL to the object in struct pd.

The uverbs_free_pd() already return busy if pd->usecnt is true, there is
no need to add a warning.

Signed-off-by: Yajun Deng <yajun.deng@...ux.dev>
---
 drivers/infiniband/core/verbs.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index e821dc94a43e..03bc9d34c13d 100644
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -268,8 +268,6 @@ struct ib_pd *__ib_alloc_pd(struct ib_device *device, unsigned int flags,
 		return ERR_PTR(-ENOMEM);
 
 	pd->device = device;
-	pd->uobject = NULL;
-	pd->__internal_mr = NULL;
 	atomic_set(&pd->usecnt, 0);
 	pd->flags = flags;
 
@@ -341,11 +339,6 @@ int ib_dealloc_pd_user(struct ib_pd *pd, struct ib_udata *udata)
 		pd->__internal_mr = NULL;
 	}
 
-	/* uverbs manipulates usecnt with proper locking, while the kabi
-	 * requires the caller to guarantee we can't race here.
-	 */
-	WARN_ON(atomic_read(&pd->usecnt));
-
 	ret = pd->device->ops.dealloc_pd(pd, udata);
 	if (ret)
 		return ret;
-- 
2.25.1