From: Wu Hao <hao.wu@intel.com>
Date: Fri, 28 Jun 2019 00:49:38 +0000 (-0700)
Subject: fpga: dfl: fme: remove copy_to_user() in ioctl for PR
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=49ec630cd5e497c97c6a8a0fc4df5b2c88ca11c6;p=linux.git

fpga: dfl: fme: remove copy_to_user() in ioctl for PR

This patch removes copy_to_user() code in partial reconfiguration
ioctl, as it's useless as user never needs to read the data
structure after ioctl.

Signed-off-by: Xu Yilun <yilun.xu@intel.com>
Signed-off-by: Wu Hao <hao.wu@intel.com>
Acked-by: Moritz Fischer <mdf@kernel.org>
Acked-by: Alan Tull <atull@kernel.org>
Signed-off-by: Moritz Fischer <mdf@kernel.org>
Link: https://lore.kernel.org/r/20190628004951.6202-3-mdf@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/fpga/dfl-fme-pr.c b/drivers/fpga/dfl-fme-pr.c
index d9ca9554844ab..6ec0f09e5994a 100644
--- a/drivers/fpga/dfl-fme-pr.c
+++ b/drivers/fpga/dfl-fme-pr.c
@@ -159,9 +159,6 @@ unlock_exit:
 	mutex_unlock(&pdata->lock);
 free_exit:
 	vfree(buf);
-	if (copy_to_user((void __user *)arg, &port_pr, minsz))
-		return -EFAULT;
-
 	return ret;
 }