linux-kernel - [PATCH v2 43/46] mtd: nandsim: Wire up NANDSIM_IOC_NEW

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Date:   Wed, 21 Sep 2016 11:57:17 +0200
From:   Daniel Walter <dwalter@...ma-star.at>
To:     linux-mtd@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, computersforpeace@...il.com,
        dwmw2@...radead.org, boris.brezillon@...e-electrons.com,
        Richard Weinberger <richard@....at>
Subject: [PATCH v2 43/46] mtd: nandsim: Wire up NANDSIM_IOC_NEW_INSTANCE

From: Richard Weinberger <richard@....at>

Since we have now all what we need we can arm NANDSIM_IOC_NEW_INSTANCE.

Signed-off-by: Richard Weinberger <richard@....at>
---
 drivers/mtd/nand/nandsim.c | 31 ++++++++++++++++++++++++++++---
 1 file changed, 28 insertions(+), 3 deletions(-)

diff --git a/drivers/mtd/nand/nandsim.c b/drivers/mtd/nand/nandsim.c
index d0cc24d..bb30763 100644
--- a/drivers/mtd/nand/nandsim.c
+++ b/drivers/mtd/nand/nandsim.c
@@ -2900,10 +2900,35 @@ out:
 static long ns_ctrl_ioctl(struct file *file, unsigned int cmd,
 			  unsigned long arg)
 {
-	if (!capable(CAP_SYS_RESOURCE))
-		return -EPERM;
+	int ret;
+	void __user *argp = (void __user *)arg;
+
+	if (!capable(CAP_SYS_RESOURCE)) {
+		ret = -EPERM;
+		goto out;
+	}
+
+	switch (cmd) {
+		case NANDSIM_IOC_NEW_INSTANCE:
+		{
+			struct ns_new_instance_req req;
+
+			ret = copy_from_user(&req, argp, sizeof(struct ns_new_instance_req));
+			if (ret) {
+				ret = -EFAULT;
+				goto out;
+			}
 
-	return -ENOTTY;
+			ret = ns_ctrl_new_instance(&req, argp + sizeof(req));
+			break;
+		}
+
+		default:
+			ret = -ENOTTY;
+	}
+
+out:
+	return ret;
 }
 
 #ifdef CONFIG_COMPAT
-- 
2.8.3