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From: Dan Carpenter <dan.carpenter@oracle.com>
To: Eli Cohen <eli@mellanox.com>
Cc: linux-rdma@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [patch -next] mlx5_core: return -EFAULT if copy_to_user() fails
Date: Wed, 10 Jul 2013 10:57:14 +0000	[thread overview]
Message-ID: <20130710105714.GC31232@longonot.mountain> (raw)

This should return an error code instead of the number of bytes
remaining to be copied.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/debugfs.c b/drivers/net/ethernet/mellanox/mlx5/core/debugfs.c
index a550a8e..4273c06 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/debugfs.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/debugfs.c
@@ -148,7 +148,6 @@ static ssize_t average_read(struct file *filp, char __user *buf, size_t count,
 	struct mlx5_cmd_stats *stats;
 	u64 field = 0;
 	int ret;
-	int err;
 	char tbuf[22];
 
 	if (*pos)
@@ -161,9 +160,8 @@ static ssize_t average_read(struct file *filp, char __user *buf, size_t count,
 	spin_unlock(&stats->lock);
 	ret = snprintf(tbuf, sizeof(tbuf), "%llu\n", field);
 	if (ret > 0) {
-		err = copy_to_user(buf, tbuf, ret);
-		if (err)
-			return err;
+		if (copy_to_user(buf, tbuf, ret))
+			return -EFAULT;
 	}
 
 	*pos += ret;
@@ -418,7 +416,6 @@ static ssize_t dbg_read(struct file *filp, char __user *buf, size_t count,
 	char tbuf[18];
 	u64 field;
 	int ret;
-	int err;
 
 	if (*pos)
 		return 0;
@@ -445,9 +442,8 @@ static ssize_t dbg_read(struct file *filp, char __user *buf, size_t count,
 
 	ret = snprintf(tbuf, sizeof(tbuf), "0x%llx\n", field);
 	if (ret > 0) {
-		err = copy_to_user(buf, tbuf, ret);
-		if (err)
-			return err;
+		if (copy_to_user(buf, tbuf, ret))
+			return -EFAULT;
 	}
 
 	*pos += ret;

WARNING: multiple messages have this Message-ID (diff)
From: Dan Carpenter <dan.carpenter@oracle.com>
To: Eli Cohen <eli@mellanox.com>
Cc: linux-rdma@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [patch -next] mlx5_core: return -EFAULT if copy_to_user() fails
Date: Wed, 10 Jul 2013 13:57:14 +0300	[thread overview]
Message-ID: <20130710105714.GC31232@longonot.mountain> (raw)

This should return an error code instead of the number of bytes
remaining to be copied.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/debugfs.c b/drivers/net/ethernet/mellanox/mlx5/core/debugfs.c
index a550a8e..4273c06 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/debugfs.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/debugfs.c
@@ -148,7 +148,6 @@ static ssize_t average_read(struct file *filp, char __user *buf, size_t count,
 	struct mlx5_cmd_stats *stats;
 	u64 field = 0;
 	int ret;
-	int err;
 	char tbuf[22];
 
 	if (*pos)
@@ -161,9 +160,8 @@ static ssize_t average_read(struct file *filp, char __user *buf, size_t count,
 	spin_unlock(&stats->lock);
 	ret = snprintf(tbuf, sizeof(tbuf), "%llu\n", field);
 	if (ret > 0) {
-		err = copy_to_user(buf, tbuf, ret);
-		if (err)
-			return err;
+		if (copy_to_user(buf, tbuf, ret))
+			return -EFAULT;
 	}
 
 	*pos += ret;
@@ -418,7 +416,6 @@ static ssize_t dbg_read(struct file *filp, char __user *buf, size_t count,
 	char tbuf[18];
 	u64 field;
 	int ret;
-	int err;
 
 	if (*pos)
 		return 0;
@@ -445,9 +442,8 @@ static ssize_t dbg_read(struct file *filp, char __user *buf, size_t count,
 
 	ret = snprintf(tbuf, sizeof(tbuf), "0x%llx\n", field);
 	if (ret > 0) {
-		err = copy_to_user(buf, tbuf, ret);
-		if (err)
-			return err;
+		if (copy_to_user(buf, tbuf, ret))
+			return -EFAULT;
 	}
 
 	*pos += ret;

             reply	other threads:[~2013-07-10 10:57 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-07-10 10:57 Dan Carpenter [this message]
2013-07-10 10:57 ` [patch -next] mlx5_core: return -EFAULT if copy_to_user() fails Dan Carpenter
2013-07-10 11:37 ` Or Gerlitz
2013-07-10 11:37   ` Or Gerlitz

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