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rsxx: don't open-code memdup_user()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2016-01-02 14:58:07 -05:00
parent 8ed6010d50
commit 820351f05b
1 changed files with 4 additions and 7 deletions
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11
drivers/block/rsxx/core.c
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@ -203,14 +203,11 @@ static ssize_t rsxx_cram_write(struct file *fp, const char __user *ubuf,
char *buf;
ssize_t st;
buf = kzalloc(cnt, GFP_KERNEL);
if (!buf)
return -ENOMEM;
buf = memdup_user(ubuf, cnt);
if (IS_ERR(buf))
return PTR_ERR(buf);
st = copy_from_user(buf, ubuf, cnt);
if (!st)
st = rsxx_creg_write(card, CREG_ADD_CRAM + (u32)*ppos, cnt,
buf, 1);
st = rsxx_creg_write(card, CREG_ADD_CRAM + (u32)*ppos, cnt, buf, 1);
kfree(buf);
if (st)
return st;