From: Meng Xu <mengxu.gatech@gmail.com>
Date: Wed, 20 Sep 2017 15:13:51 +0000 (-0400)
Subject: scsi: mpt3sas: remove redundant copy_from_user in _ctl_getiocinfo
X-Git-Tag: v4.15-rc1~125^2~184
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=c0ff7e2c217d6b367cd0343f14866677f7cf4dc6;p=thirdparty%2Fkernel%2Flinux.git

scsi: mpt3sas: remove redundant copy_from_user in _ctl_getiocinfo

Since right after the user copy, we are going to memset(&karg, 0,
sizeof(karg)), the copy_from_user is redundant

Signed-off-by: Meng Xu <mengxu.gatech@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---

diff --git a/drivers/scsi/mpt3sas/mpt3sas_ctl.c b/drivers/scsi/mpt3sas/mpt3sas_ctl.c
index bdffb692bded4..d448fedca3b92 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_ctl.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_ctl.c
@@ -1065,12 +1065,6 @@ _ctl_getiocinfo(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
 {
 	struct mpt3_ioctl_iocinfo karg;
 
-	if (copy_from_user(&karg, arg, sizeof(karg))) {
-		pr_err("failure at %s:%d/%s()!\n",
-		    __FILE__, __LINE__, __func__);
-		return -EFAULT;
-	}
-
 	dctlprintk(ioc, pr_info(MPT3SAS_FMT "%s: enter\n", ioc->name,
 	    __func__));