[PATCHv2] crypto: amcc: get irq and ioremap resource first

[Rosen Penev <rosenp@gmail.com>]

These functions can return -EPROBE_DEFER and require no special setup
other than the platform_device which is already provided.

Avoids doing extra work when not needed.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
 v2; remove now dead error check.
 drivers/crypto/amcc/crypto4xx_core.c | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/drivers/crypto/amcc/crypto4xx_core.c b/drivers/crypto/amcc/crypto4xx_core.c
index e13b49c22570..af2613c6e3c8 100644
--- a/drivers/crypto/amcc/crypto4xx_core.c
+++ b/drivers/crypto/amcc/crypto4xx_core.c
@@ -1209,9 +1209,19 @@ static int crypto4xx_probe(struct platform_device *ofdev)
 	struct device *dev = &ofdev->dev;
 	struct crypto4xx_core_device *core_dev;
 	struct device_node *np;
+	void __iomem *ce_base;
+	int irq;
 	u32 pvr;
 	bool is_revb = true;
 
+	irq = platform_get_irq(ofdev, 0);
+	if (irq < 0)
+		return irq;
+
+	ce_base = devm_platform_ioremap_resource(ofdev, 0);
+	if (IS_ERR(ce_base))
+		return PTR_ERR(ce_base);
+
 	np = of_find_compatible_node(NULL, NULL, "amcc,ppc460ex-crypto");
 	if (np) {
 		mtdcri(SDR0, PPC460EX_SDR0_SRST,
@@ -1254,9 +1264,7 @@ static int crypto4xx_probe(struct platform_device *ofdev)
 	if (!core_dev->dev)
 		return -ENOMEM;
 
-	core_dev->dev->ce_base = devm_platform_ioremap_resource(ofdev, 0);
-	if (IS_ERR(core_dev->dev->ce_base))
-		return PTR_ERR(core_dev->dev->ce_base);
+	core_dev->dev->ce_base = ce_base;
 
 	/*
 	 * Older version of 460EX/GT have a hardware bug.
@@ -1294,11 +1302,7 @@ static int crypto4xx_probe(struct platform_device *ofdev)
 		     (unsigned long) dev);
 
 	/* Register for Crypto isr, Crypto Engine IRQ */
-	core_dev->irq = platform_get_irq(ofdev, 0);
-	if (core_dev->irq < 0) {
-		rc = core_dev->irq;
-		goto err_tasklet;
-	}
+	core_dev->irq = irq;
 	rc = request_irq(core_dev->irq,
 			 is_revb ? crypto4xx_ce_interrupt_handler_revb :
 				   crypto4xx_ce_interrupt_handler,
-- 
2.55.0