linux-kernel - [PATCH v2 2/6] crypto: caam - use devres to remove debugfs

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Message-Id: <20191022153013.3692-3-andrew.smirnov@gmail.com>
Date:   Tue, 22 Oct 2019 08:30:09 -0700
From:   Andrey Smirnov <andrew.smirnov@...il.com>
To:     linux-crypto@...r.kernel.org
Cc:     Andrey Smirnov <andrew.smirnov@...il.com>,
        Horia Geantă <horia.geanta@....com>,
        Chris Healy <cphealy@...il.com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Iuliana Prodan <iuliana.prodan@....com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 2/6] crypto: caam - use devres to remove debugfs

Use devres to remove debugfs and drop corresponding
debugfs_remove_recursive() call.

Signed-off-by: Andrey Smirnov <andrew.smirnov@...il.com>
Reviewed-by: Horia Geantă <horia.geanta@....com>
Cc: Chris Healy <cphealy@...il.com>
Cc: Lucas Stach <l.stach@...gutronix.de>
Cc: Horia Geantă <horia.geanta@....com>
Cc: Herbert Xu <herbert@...dor.apana.org.au>
Cc: Iuliana Prodan <iuliana.prodan@....com>
Cc: linux-crypto@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
---
 drivers/crypto/caam/ctrl.c   | 21 ++++++++++++++-------
 drivers/crypto/caam/intern.h |  1 -
 2 files changed, 14 insertions(+), 8 deletions(-)

diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c
index 35bf82d1bedc..254963498abc 100644
--- a/drivers/crypto/caam/ctrl.c
+++ b/drivers/crypto/caam/ctrl.c
@@ -327,11 +327,6 @@ static int caam_remove(struct platform_device *pdev)
 	if (!ctrlpriv->mc_en && ctrlpriv->rng4_sh_init)
 		deinstantiate_rng(ctrldev, ctrlpriv->rng4_sh_init);
 
-	/* Shut down debug views */
-#ifdef CONFIG_DEBUG_FS
-	debugfs_remove_recursive(ctrlpriv->dfs_root);
-#endif
-
 	return 0;
 }
 
@@ -563,6 +558,13 @@ static int init_clocks(struct device *dev, const struct caam_imx_data *data)
 	return devm_add_action_or_reset(dev, disable_clocks, ctrlpriv);
 }
 
+#ifdef CONFIG_DEBUG_FS
+static void caam_remove_debugfs(void *root)
+{
+	debugfs_remove_recursive(root);
+}
+#endif
+
 /* Probe routine for CAAM top (controller) level */
 static int caam_probe(struct platform_device *pdev)
 {
@@ -575,6 +577,7 @@ static int caam_probe(struct platform_device *pdev)
 	struct caam_drv_private *ctrlpriv;
 #ifdef CONFIG_DEBUG_FS
 	struct caam_perfmon *perfmon;
+	struct dentry *dfs_root;
 #endif
 	u32 scfgr, comp_params;
 	u8 rng_vid;
@@ -728,8 +731,12 @@ static int caam_probe(struct platform_device *pdev)
 	 */
 	perfmon = (struct caam_perfmon __force *)&ctrl->perfmon;
 
-	ctrlpriv->dfs_root = debugfs_create_dir(dev_name(dev), NULL);
-	ctrlpriv->ctl = debugfs_create_dir("ctl", ctrlpriv->dfs_root);
+	dfs_root = debugfs_create_dir(dev_name(dev), NULL);
+	ret = devm_add_action_or_reset(dev, caam_remove_debugfs, dfs_root);
+	if (ret)
+		return ret;
+
+	ctrlpriv->ctl = debugfs_create_dir("ctl", dfs_root);
 #endif
 
 	/* Check to see if (DPAA 1.x) QI present. If so, enable */
diff --git a/drivers/crypto/caam/intern.h b/drivers/crypto/caam/intern.h
index 731b06becd9c..359eb76d1259 100644
--- a/drivers/crypto/caam/intern.h
+++ b/drivers/crypto/caam/intern.h
@@ -102,7 +102,6 @@ struct caam_drv_private {
 	 * variables at runtime.
 	 */
 #ifdef CONFIG_DEBUG_FS
-	struct dentry *dfs_root;
 	struct dentry *ctl; /* controller dir */
 	struct debugfs_blob_wrapper ctl_kek_wrap, ctl_tkek_wrap, ctl_tdsk_wrap;
 #endif
-- 
2.21.0