[PATCH] crypto: hisilicon/sec: use devm_platform_ioremap_resource in sec_map_io

[PATCH] crypto: hisilicon/sec: use devm_platform_ioremap_resource in sec_map_io

[Rosen Penev]

Replace the open-coded platform_get_resource() plus devm_ioremap()
sequence in the SEC_NUM_ADDR_REGIONS loop with
devm_platform_ioremap_resource(), which fetches the resource, requests
the region and maps it in one call. Switch the error check to
IS_ERR()/PTR_ERR() and drop the now-unused struct resource pointer.

The driver only maps indices 0 and 1 (SEC_COMMON, SEC_SAA). On hip07 the
corresponding reg regions (0xd0000000, 0xd2000000) are 0x10000 each and
disjoint, so the region reservation added by devm_ioremap_resource() is
exclusive and does not introduce overlap failures.

Built for arm64 (drivers/crypto/hisilicon/sec/sec_drv.o) with LLVM=1.

Assisted-by: opencode:hy3-free
Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
 drivers/crypto/hisilicon/sec/sec_drv.c | 19 +++----------------
 1 file changed, 3 insertions(+), 16 deletions(-)

diff --git a/drivers/crypto/hisilicon/sec/sec_drv.c b/drivers/crypto/hisilicon/sec/sec_drv.c
index 129cb6faa0b7..2514a5e1f9b4 100644
--- a/drivers/crypto/hisilicon/sec/sec_drv.c
+++ b/drivers/crypto/hisilicon/sec/sec_drv.c
@@ -1010,25 +1010,12 @@ static void sec_queue_base_init(struct sec_dev_info *info,
 
 static int sec_map_io(struct sec_dev_info *info, struct platform_device *pdev)
 {
-	struct resource *res;
 	int i;
 
 	for (i = 0; i < SEC_NUM_ADDR_REGIONS; i++) {
-		res = platform_get_resource(pdev, IORESOURCE_MEM, i);
-
-		if (!res) {
-			dev_err(info->dev, "Memory resource %d not found\n", i);
-			return -EINVAL;
-		}
-
-		info->regs[i] = devm_ioremap(info->dev, res->start,
-					     resource_size(res));
-		if (!info->regs[i]) {
-			dev_err(info->dev,
-				"Memory resource %d could not be remapped\n",
-				i);
-			return -EINVAL;
-		}
+		info->regs[i] = devm_platform_ioremap_resource(pdev, i);
+		if (IS_ERR(info->regs[i]))
+			return PTR_ERR(info->regs[i]);
 	}
 
 	return 0;
-- 
2.55.0