linux-kernel - [PATCH 08/12] crypto: caam - use devres to de-initialize QI

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Date:   Tue,  3 Sep 2019 19:35:11 -0700
From:   Andrey Smirnov <andrew.smirnov@...il.com>
To:     linux-crypto@...r.kernel.org
Cc:     Andrey Smirnov <andrew.smirnov@...il.com>,
        Chris Healy <cphealy@...il.com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Horia Geantă <horia.geanta@....com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Iuliana Prodan <iuliana.prodan@....com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 08/12] crypto: caam - use devres to de-initialize QI

Use devres to de-initialize the QI and drop explicit de-initialization
code in caam_remove().

Signed-off-by: Andrey Smirnov <andrew.smirnov@...il.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   | 14 +-------------
 drivers/crypto/caam/intern.h |  3 ---
 drivers/crypto/caam/qi.c     |  8 ++++++--
 drivers/crypto/caam/qi.h     |  1 -
 4 files changed, 7 insertions(+), 19 deletions(-)

diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c
index 25f8f76551a5..37cd04f8ddb1 100644
--- a/drivers/crypto/caam/ctrl.c
+++ b/drivers/crypto/caam/ctrl.c
@@ -333,11 +333,6 @@ static int caam_remove(struct platform_device *pdev)
 	/* Remove platform devices under the crypto node */
 	of_platform_depopulate(ctrldev);
 
-#ifdef CONFIG_CAAM_QI
-	if (ctrlpriv->qi_init)
-		caam_qi_shutdown(ctrldev);
-#endif
-
 	return 0;
 }
 
@@ -770,7 +765,7 @@ static int caam_probe(struct platform_device *pdev)
 	ret = of_platform_populate(nprop, caam_match, NULL, dev);
 	if (ret) {
 		dev_err(dev, "JR platform devices creation error\n");
-		goto shutdown_qi;
+		return ret;
 	}
 
 	ring = 0;
@@ -931,13 +926,6 @@ static int caam_probe(struct platform_device *pdev)
 caam_remove:
 	caam_remove(pdev);
 	return ret;
-
-shutdown_qi:
-#ifdef CONFIG_CAAM_QI
-	if (ctrlpriv->qi_init)
-		caam_qi_shutdown(dev);
-#endif
-	return ret;
 }
 
 static struct platform_driver caam_driver = {
diff --git a/drivers/crypto/caam/intern.h b/drivers/crypto/caam/intern.h
index 359eb76d1259..c7c10c90464b 100644
--- a/drivers/crypto/caam/intern.h
+++ b/drivers/crypto/caam/intern.h
@@ -81,9 +81,6 @@ struct caam_drv_private {
 	 */
 	u8 total_jobrs;		/* Total Job Rings in device */
 	u8 qi_present;		/* Nonzero if QI present in device */
-#ifdef CONFIG_CAAM_QI
-	u8 qi_init;		/* Nonzero if QI has been initialized */
-#endif
 	u8 mc_en;		/* Nonzero if MC f/w is active */
 	int secvio_irq;		/* Security violation interrupt number */
 	int virt_en;		/* Virtualization enabled in CAAM */
diff --git a/drivers/crypto/caam/qi.c b/drivers/crypto/caam/qi.c
index 378f627e1d64..dacf2fa4aa8e 100644
--- a/drivers/crypto/caam/qi.c
+++ b/drivers/crypto/caam/qi.c
@@ -500,9 +500,10 @@ void caam_drv_ctx_rel(struct caam_drv_ctx *drv_ctx)
 }
 EXPORT_SYMBOL(caam_drv_ctx_rel);
 
-void caam_qi_shutdown(struct device *qidev)
+static void caam_qi_shutdown(void *data)
 {
 	int i;
+	struct device *qidev = data;
 	struct caam_qi_priv *priv = &qipriv;
 	const cpumask_t *cpus = qman_affine_cpus();
 
@@ -761,7 +762,10 @@ int caam_qi_init(struct platform_device *caam_pdev)
 			    &times_congested, &caam_fops_u64_ro);
 #endif
 
-	ctrlpriv->qi_init = 1;
+	err = devm_add_action_or_reset(qidev, caam_qi_shutdown, ctrlpriv);
+	if (err)
+		return err;
+
 	dev_info(qidev, "Linux CAAM Queue I/F driver initialised\n");
 	return 0;
 }
diff --git a/drivers/crypto/caam/qi.h b/drivers/crypto/caam/qi.h
index db0549549e3b..848958951f68 100644
--- a/drivers/crypto/caam/qi.h
+++ b/drivers/crypto/caam/qi.h
@@ -147,7 +147,6 @@ int caam_drv_ctx_update(struct caam_drv_ctx *drv_ctx, u32 *sh_desc);
 void caam_drv_ctx_rel(struct caam_drv_ctx *drv_ctx);
 
 int caam_qi_init(struct platform_device *pdev);
-void caam_qi_shutdown(struct device *dev);
 
 /**
  * qi_cache_alloc - Allocate buffers from CAAM-QI cache
-- 
2.21.0