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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2021-03-03 13:59:12 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-03-03 06:48:44 -0700 |
| commit | 77516d25f54912a7baedeeac1b1b828b6f285152 (patch) | |
| tree | 1d3c284e63bb6d024fe43b37ee002dd2241ccf5b | |
| parent | 4168a8d27ed3a00f160e7f885c956f060d2a0741 (diff) | |
| download | lwn-77516d25f54912a7baedeeac1b1b828b6f285152.tar.gz lwn-77516d25f54912a7baedeeac1b1b828b6f285152.zip | |
rsxx: Return -EFAULT if copy_to_user() fails
The copy_to_user() function returns the number of bytes remaining but
we want to return -EFAULT to the user if it can't complete the copy.
The "st" variable only holds zero on success or negative error codes on
failure so the type should be int.
Fixes: 36f988e978f8 ("rsxx: Adding in debugfs entries.")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | drivers/block/rsxx/core.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/block/rsxx/core.c b/drivers/block/rsxx/core.c index 63f549889f87..5ac1881396af 100644 --- a/drivers/block/rsxx/core.c +++ b/drivers/block/rsxx/core.c @@ -165,15 +165,17 @@ static ssize_t rsxx_cram_read(struct file *fp, char __user *ubuf, { struct rsxx_cardinfo *card = file_inode(fp)->i_private; char *buf; - ssize_t st; + int st; buf = kzalloc(cnt, GFP_KERNEL); if (!buf) return -ENOMEM; st = rsxx_creg_read(card, CREG_ADD_CRAM + (u32)*ppos, cnt, buf, 1); - if (!st) - st = copy_to_user(ubuf, buf, cnt); + if (!st) { + if (copy_to_user(ubuf, buf, cnt)) + st = -EFAULT; + } kfree(buf); if (st) return st; |