From: Markus Elfring <Markus.Elfring@web.de>
To: linux-arm-kernel@lists.infradead.org,
Arnd Bergmann <arnd@arndb.de>,
Derek Kiernan <derek.kiernan@xilinx.com>,
Dragan Cvetic <dragan.cvetic@xilinx.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Michal Simek <michal.simek@xilinx.com>
Cc: kernel-janitors@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH 1/2] misc: xilinx_sdfec: Use memdup_user() rather than duplicating its implementation
Date: Tue, 5 Nov 2019 19:54:30 +0100 [thread overview]
Message-ID: <f6f8f94b-295f-48f5-902e-3d6d4052d76b@web.de> (raw)
In-Reply-To: <af1ff373-56c0-ca49-36dd-15666d183c95@web.de>
From: Markus Elfring <elfring@users.sourceforge.net>
Date: Tue, 5 Nov 2019 19:09:15 +0100
Reuse existing functionality from memdup_user() instead of keeping
duplicate source code.
Generated by: scripts/coccinelle/api/memdup_user.cocci
Fixes: 20ec628e8007ec75c2f884e00004f39eab6289b5 ("misc: xilinx_sdfec: Add ability to configure LDPC")
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
drivers/misc/xilinx_sdfec.c | 11 +++--------
1 file changed, 3 insertions(+), 8 deletions(-)
diff --git a/drivers/misc/xilinx_sdfec.c b/drivers/misc/xilinx_sdfec.c
index 11835969e982..a622fcf4954a 100644
--- a/drivers/misc/xilinx_sdfec.c
+++ b/drivers/misc/xilinx_sdfec.c
@@ -649,14 +649,9 @@ static int xsdfec_add_ldpc(struct xsdfec_dev *xsdfec, void __user *arg)
struct xsdfec_ldpc_params *ldpc;
int ret, n;
- ldpc = kzalloc(sizeof(*ldpc), GFP_KERNEL);
- if (!ldpc)
- return -ENOMEM;
-
- if (copy_from_user(ldpc, arg, sizeof(*ldpc))) {
- ret = -EFAULT;
- goto err_out;
- }
+ ldpc = memdup_user(arg, sizeof(*ldpc));
+ if (IS_ERR(ldpc))
+ return PTR_ERR(ldpc);
if (xsdfec->config.code == XSDFEC_TURBO_CODE) {
ret = -EIO;
--
2.24.0
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next prev parent reply other threads:[~2019-11-05 18:54 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-05 18:52 [PATCH 0/2] misc: xilinx_sdfec: Adjustments for xsdfec_add_ldpc() Markus Elfring
2019-11-05 18:54 ` Markus Elfring [this message]
2019-11-07 15:40 ` [PATCH 1/2] misc: xilinx_sdfec: Use memdup_user() rather than duplicating its implementation Dragan Cvetic
2019-11-10 22:18 ` Dragan Cvetic
2019-11-05 18:56 ` [PATCH 2/2] misc: xilinx_sdfec: Combine three condition checks into one statement in xsdfec_add_ldpc() Markus Elfring
2019-11-07 16:30 ` Dragan Cvetic
2019-11-07 21:58 ` Dragan Cvetic
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