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vme_user: don't use __copy_..._user() 

Saving access_ok() is not worth the trouble; yes, the callers of ->read()
and ->write() will have done the right checks, but it's much too long
(and varied) call chains to rely upon.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2017-12-29 16:12:28 -05:00
parent 3d46d7108d
commit 14544d7690
1 changed files with 4 additions and 4 deletions
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8
drivers/staging/vme/devices/vme_user.c
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@ -134,7 +134,7 @@ static ssize_t resource_to_user(int minor, char __user *buf, size_t count,
if (copied < 0)
return (int)copied;
if (__copy_to_user(buf, image[minor].kern_buf, (unsigned long)copied))
if (copy_to_user(buf, image[minor].kern_buf, (unsigned long)copied))
return -EFAULT;
return copied;
@ -146,7 +146,7 @@ static ssize_t resource_from_user(unsigned int minor, const char __user *buf,
if (count > image[minor].size_buf)
count = image[minor].size_buf;
if (__copy_from_user(image[minor].kern_buf, buf, (unsigned long)count))
if (copy_from_user(image[minor].kern_buf, buf, (unsigned long)count))
return -EFAULT;
return vme_master_write(image[minor].resource, image[minor].kern_buf,
@ -159,7 +159,7 @@ static ssize_t buffer_to_user(unsigned int minor, char __user *buf,
void *image_ptr;
image_ptr = image[minor].kern_buf + *ppos;
if (__copy_to_user(buf, image_ptr, (unsigned long)count))
if (copy_to_user(buf, image_ptr, (unsigned long)count))
return -EFAULT;
return count;
@ -171,7 +171,7 @@ static ssize_t buffer_from_user(unsigned int minor, const char __user *buf,
void *image_ptr;
image_ptr = image[minor].kern_buf + *ppos;
if (__copy_from_user(image_ptr, buf, (unsigned long)count))
if (copy_from_user(image_ptr, buf, (unsigned long)count))
return -EFAULT;
return count;