Input: edt-ft5x06 - return -EFAULT on copy_to_user() error
copy_to_user() returns the number of bytes remaining, but we want a negative error code here. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
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@ -566,9 +566,12 @@ static ssize_t edt_ft5x06_debugfs_raw_data_read(struct file *file,
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}
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read = min_t(size_t, count, tsdata->raw_bufsize - *off);
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error = copy_to_user(buf, tsdata->raw_buffer + *off, read);
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if (!error)
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*off += read;
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if (copy_to_user(buf, tsdata->raw_buffer + *off, read)) {
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error = -EFAULT;
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goto out;
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}
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*off += read;
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out:
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mutex_unlock(&tsdata->mutex);
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return error ?: read;
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