staging: rtl8723bs: use standard skb allocation APIs

Replace custom wrappers rtw_skb_alloc() and rtw_skb_copy() with
standard kernel APIs __dev_alloc_skb() and skb_copy().

About GFP Flags:
- GFP_ATOMIC is used for allocations in atomic contexts such as
  spinlock-protected sections, tasklets, and timer handlers.
- GFP_KERNEL is used for process contexts where sleeping is allowed.

Signed-off-by: Minu Jin <s9430939@naver.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Link: https://patch.msgid.link/20260204131347.3515949-5-s9430939@naver.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: Jminu

drivers/staging/rtl8723bs/core/rtw_recv.c

@@ -1630,7 +1630,7 @@ static struct sk_buff *rtw_alloc_msdu_pkt(union recv_frame *prframe, u16 nSubfra
 
 	pattrib = &prframe->u.hdr.attrib;
 
-	sub_skb = rtw_skb_alloc(nSubframe_Length + 12);
+	sub_skb = __dev_alloc_skb(nSubframe_Length + 12, GFP_ATOMIC);
 	if (!sub_skb)
 		return NULL;
 

drivers/staging/rtl8723bs/hal/rtl8723bs_recv.c

@@ -290,7 +290,7 @@ static void rtl8723bs_recv_tasklet(struct tasklet_struct *t)
 					alloc_sz += 14;
 				}
 
-				pkt_copy = rtw_skb_alloc(alloc_sz);
+				pkt_copy = __dev_alloc_skb(alloc_sz, GFP_ATOMIC);
 				if (!pkt_copy) {
 					rtw_free_recvframe(precvframe, &precvpriv->free_recv_queue);
 					break;
@@ -397,8 +397,7 @@ s32 rtl8723bs_init_recv_priv(struct adapter *padapter)
 			SIZE_PTR tmpaddr = 0;
 			SIZE_PTR alignment = 0;
 
-			precvbuf->pskb = rtw_skb_alloc(MAX_RECVBUF_SZ + RECVBUFF_ALIGN_SZ);
-
+			precvbuf->pskb = __dev_alloc_skb(MAX_RECVBUF_SZ + RECVBUFF_ALIGN_SZ, GFP_ATOMIC);
 			if (precvbuf->pskb) {
 				precvbuf->pskb->dev = padapter->pnetdev;
 

drivers/staging/rtl8723bs/hal/sdio_ops.c

@@ -810,7 +810,7 @@ static struct recv_buf *sd_recv_rxfifo(struct adapter *adapter, u32 size)
 		SIZE_PTR tmpaddr = 0;
 		SIZE_PTR alignment = 0;
 
-		recvbuf->pskb = rtw_skb_alloc(MAX_RECVBUF_SZ + RECVBUFF_ALIGN_SZ);
+		recvbuf->pskb = __dev_alloc_skb(MAX_RECVBUF_SZ + RECVBUFF_ALIGN_SZ, GFP_ATOMIC);
 		if (!recvbuf->pskb)
 			return NULL;
 

drivers/staging/rtl8723bs/os_dep/xmit_linux.c

@@ -162,8 +162,7 @@ static int rtw_mlcst2unicst(struct adapter *padapter, struct sk_buff *skb)
 		    !memcmp(psta->hwaddr, bc_addr, 6))
 			continue;
 
-		newskb = rtw_skb_copy(skb);
-
+		newskb = skb_copy(skb, GFP_ATOMIC);
 		if (newskb) {
 			memcpy(newskb->data, psta->hwaddr, 6);
 			res = rtw_xmit(padapter, &newskb);