linux-kernel - [PATCH] ntb: ntb_pingpong: no need to check the return value of debugfs calls

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Message-ID: <20191011131919.GA1174815@kroah.com>
Date:   Fri, 11 Oct 2019 15:19:19 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Jon Mason <jdmason@...zu.us>, Dave Jiang <dave.jiang@...el.com>,
        Allen Hubbe <allenbh@...il.com>
Cc:     linux-ntb@...glegroups.com, linux-kernel@...r.kernel.org
Subject: [PATCH] ntb: ntb_pingpong: no need to check the return value of
 debugfs calls

There is no need to check the return value of debugfs_create_atomic_t as
nothing happens with the error.  Also, the code will never return NULL,
so this check has never caught anything :)

Fix this by removing the check entirely.

Cc: Jon Mason <jdmason@...zu.us>
Cc: Dave Jiang <dave.jiang@...el.com>
Cc: Allen Hubbe <allenbh@...il.com>
Cc: linux-ntb@...glegroups.com
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/ntb/test/ntb_pingpong.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/ntb/test/ntb_pingpong.c b/drivers/ntb/test/ntb_pingpong.c
index 65865e460ab8..04dd46647db3 100644
--- a/drivers/ntb/test/ntb_pingpong.c
+++ b/drivers/ntb/test/ntb_pingpong.c
@@ -354,13 +354,10 @@ static void pp_clear_ctx(struct pp_ctx *pp)
 static void pp_setup_dbgfs(struct pp_ctx *pp)
 {
 	struct pci_dev *pdev = pp->ntb->pdev;
-	void *ret;
 
 	pp->dbgfs_dir = debugfs_create_dir(pci_name(pdev), pp_dbgfs_topdir);
 
-	ret = debugfs_create_atomic_t("count", 0600, pp->dbgfs_dir, &pp->count);
-	if (!ret)
-		dev_warn(&pp->ntb->dev, "DebugFS unsupported\n");
+	debugfs_create_atomic_t("count", 0600, pp->dbgfs_dir, &pp->count);
 }
 
 static void pp_clear_dbgfs(struct pp_ctx *pp)
-- 
2.23.0