linux-kernel - [PATCH v2 1/7] crypto: mv_cesa: request registers memory region

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Date:	Mon,  4 May 2015 14:27:00 +0200
From:	Boris Brezillon <boris.brezillon@...e-electrons.com>
To:	Herbert Xu <herbert@...dor.apana.org.au>,
	"David S. Miller" <davem@...emloft.net>,
	linux-crypto@...r.kernel.org
Cc:	Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>, devicetree@...r.kernel.org,
	Tawfik Bayouk <tawfik@...vell.com>,
	Lior Amsalem <alior@...vell.com>,
	Nadav Haklai <nadavh@...vell.com>,
	Eran Ben-Avi <benavi@...vell.com>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Gregory CLEMENT <gregory.clement@...e-electrons.com>,
	Jason Cooper <jason@...edaemon.net>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	Andrew Lunn <andrew@...n.ch>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Arnaud Ebalard <arno@...isbad.org>,
	Boris Brezillon <boris.brezillon@...e-electrons.com>
Subject: [PATCH v2 1/7] crypto: mv_cesa: request registers memory region

The mv_cesa driver does not request the CESA registers memory region.
Since we're about to add a new CESA driver, we need to make sure only one
of these drivers probe the CESA device, and requesting the registers memory
region is a good way to achieve that.

Signed-off-by: Boris Brezillon <boris.brezillon@...e-electrons.com>
---
 drivers/crypto/mv_cesa.c | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/drivers/crypto/mv_cesa.c b/drivers/crypto/mv_cesa.c
index f91f15d..27b2373 100644
--- a/drivers/crypto/mv_cesa.c
+++ b/drivers/crypto/mv_cesa.c
@@ -1041,23 +1041,23 @@ static int mv_probe(struct platform_device *pdev)
 
 	spin_lock_init(&cp->lock);
 	crypto_init_queue(&cp->queue, 50);
-	cp->reg = ioremap(res->start, resource_size(res));
-	if (!cp->reg) {
-		ret = -ENOMEM;
+	cp->reg = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(cp->reg)) {
+		ret = PTR_ERR(cp->reg);
 		goto err;
 	}
 
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sram");
 	if (!res) {
 		ret = -ENXIO;
-		goto err_unmap_reg;
+		goto err;
 	}
 	cp->sram_size = resource_size(res);
 	cp->max_req_size = cp->sram_size - SRAM_CFG_SPACE;
 	cp->sram = ioremap(res->start, cp->sram_size);
 	if (!cp->sram) {
 		ret = -ENOMEM;
-		goto err_unmap_reg;
+		goto err;
 	}
 
 	if (pdev->dev.of_node)
@@ -1136,8 +1136,6 @@ err_thread:
 	kthread_stop(cp->queue_th);
 err_unmap_sram:
 	iounmap(cp->sram);
-err_unmap_reg:
-	iounmap(cp->reg);
 err:
 	kfree(cp);
 	cpg = NULL;
@@ -1158,7 +1156,6 @@ static int mv_remove(struct platform_device *pdev)
 	free_irq(cp->irq, cp);
 	memset(cp->sram, 0, cp->sram_size);
 	iounmap(cp->sram);
-	iounmap(cp->reg);
 
 	if (!IS_ERR(cp->clk)) {
 		clk_disable_unprepare(cp->clk);
-- 
1.9.1

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