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RDMA/ucma: Convert open-coded equivalent to memdup_user()

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Suggested by scripts/coccinelle/api/memdup_user.cocci.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Roland Dreier 2012-07-27 13:27:45 -07:00
parent 4e28904528
commit 0764c76ecb
1 changed files with 7 additions and 12 deletions
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19
drivers/infiniband/core/ucma.c
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@ -1002,23 +1002,18 @@ static ssize_t ucma_set_option(struct ucma_file *file, const char __user *inbuf,
if (IS_ERR(ctx)) if (IS_ERR(ctx))
return PTR_ERR(ctx); return PTR_ERR(ctx);
optval = kmalloc(cmd.optlen, GFP_KERNEL); optval = memdup_user((void __user *) (unsigned long) cmd.optval,
if (!optval) { cmd.optlen);
ret = -ENOMEM; if (IS_ERR(optval)) {
goto out1; ret = PTR_ERR(optval);
} goto out;
if (copy_from_user(optval, (void __user *) (unsigned long) cmd.optval,
cmd.optlen)) {
ret = -EFAULT;
goto out2;
} }
ret = ucma_set_option_level(ctx, cmd.level, cmd.optname, optval, ret = ucma_set_option_level(ctx, cmd.level, cmd.optname, optval,
cmd.optlen); cmd.optlen);
out2:
kfree(optval); kfree(optval);
out1:
out:
ucma_put_ctx(ctx); ucma_put_ctx(ctx);
return ret; return ret;
} }