From: Jerome Pouiller <Jerome.Pouiller@silabs.com>
To: "devel@driverdev.osuosl.org" <devel@driverdev.osuosl.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Dan Carpenter <dan.carpenter@oracle.com>
Subject: [PATCH 5/7] staging: wfx: fix copy_{to,from}_user() usage
Date: Tue, 8 Oct 2019 09:43:00 +0000 [thread overview]
Message-ID: <20191008094232.10014-6-Jerome.Pouiller@silabs.com> (raw)
In-Reply-To: <20191008094232.10014-1-Jerome.Pouiller@silabs.com>
From: Jérôme Pouiller <jerome.pouiller@silabs.com>
On error, copy_to_user() returns number of bytes remaining. Driver
should return -EFAULT.
Fixes: 4f8b7fabb15d ("staging: wfx: allow to send commands to chip")
Reported-by: kbuild test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
---
drivers/staging/wfx/debug.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/staging/wfx/debug.c b/drivers/staging/wfx/debug.c
index 3261b267c385..8de16ad7c710 100644
--- a/drivers/staging/wfx/debug.c
+++ b/drivers/staging/wfx/debug.c
@@ -256,9 +256,8 @@ static ssize_t wfx_send_hif_msg_read(struct file *file, char __user *user_buf,
return context->ret;
// Be carefull, write() is waiting for a full message while read()
// only return a payload
- ret = copy_to_user(user_buf, context->reply, count);
- if (ret)
- return ret;
+ if (copy_to_user(user_buf, context->reply, count))
+ return -EFAULT;
return count;
}
--
2.20.1
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next prev parent reply other threads:[~2019-10-08 10:17 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-08 9:42 [PATCH 0/7] Fix various compilation issues with wfx driver Jerome Pouiller
2019-10-08 9:42 ` [PATCH 1/7] staging: wfx: simplify memory allocation in wfx_update_filtering() Jerome Pouiller
2019-10-08 11:59 ` Dan Carpenter
2019-10-08 9:42 ` [PATCH 2/7] staging: wfx: remove misused call to cpu_to_le16() Jerome Pouiller
2019-10-08 9:42 ` [PATCH 3/7] staging: wfx: le16_to_cpus() takes a reference as parameter Jerome Pouiller
2019-10-08 9:43 ` [PATCH 4/7] staging: wfx: correctly cast data on big-endian targets Jerome Pouiller
2019-10-08 12:01 ` Dan Carpenter
2019-10-08 9:43 ` Jerome Pouiller [this message]
2019-10-08 9:43 ` [PATCH 7/7] staging: wfx: avoid namespace contamination Jerome Pouiller
2019-10-08 9:43 ` [PATCH 6/7] staging: wfx: drop calls to BUG_ON() Jerome Pouiller
2019-10-08 12:07 ` Dan Carpenter
2019-10-08 15:10 ` [PATCH 0/7] Fix various compilation issues with wfx driver Greg Kroah-Hartman
2019-10-09 15:13 ` Jerome Pouiller
2019-10-09 18:58 ` Dan Carpenter
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