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scsi: megaraid_sas: Use memdup_user() rather than duplicating its implementation 

Reuse existing functionality from memdup_user() instead of keeping
duplicate source code.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Acked by: Sumit Saxena <sumit.saxena@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Markus Elfring 2016-08-21 10:39:04 +02:00 committed by Martin K. Petersen
parent 2a1e844715
commit 709ab231f8
1 changed files with 3 additions and 8 deletions
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11
drivers/scsi/megaraid/megaraid_sas_base.c
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@ -6711,14 +6711,9 @@ static int megasas_mgmt_ioctl_fw(struct file *file, unsigned long arg)
unsigned long flags;
u32 wait_time = MEGASAS_RESET_WAIT_TIME;
ioc = kmalloc(sizeof(*ioc), GFP_KERNEL);
if (!ioc)
return -ENOMEM;
if (copy_from_user(ioc, user_ioc, sizeof(*ioc))) {
error = -EFAULT;
goto out_kfree_ioc;
}
ioc = memdup_user(user_ioc, sizeof(*ioc));
if (IS_ERR(ioc))
return PTR_ERR(ioc);
instance = megasas_lookup_instance(ioc->host_no);
if (!instance) {