staging: rtl8192u: use memdup_user to simplify code
Use memdup_user rather than duplicating its implementation. Fix the
following coccinelle warnings:
drivers/staging/rtl8192u/r8192U_core.c:3792:7-14: WARNING opportunity for memdup_user
drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c:3153:9-16: WARNING opportunity for memdup_user
Signed-off-by: Teodora Baluta <teobaluta@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/rtl8192u/r8192U_core.c b/drivers/staging/rtl8192u/r8192U_core.c
index 63a4cdf..c2bcbe2 100644
--- a/drivers/staging/rtl8192u/r8192U_core.c
+++ b/drivers/staging/rtl8192u/r8192U_core.c
@@ -3789,14 +3789,9 @@
goto out;
}
- ipw = kmalloc(p->length, GFP_KERNEL);
- if (ipw == NULL) {
- ret = -ENOMEM;
- goto out;
- }
- if (copy_from_user(ipw, p->pointer, p->length)) {
- kfree(ipw);
- ret = -EFAULT;
+ ipw = memdup_user(p->pointer, p->length);
+ if (IS_ERR(ipw)) {
+ ret = PTR_ERR(ipw);
goto out;
}