r8188eu: remove unused urbs from struct xmit_buf

Driver allocates eighth urbs per xmit_buf, but uses only first urb.
Allocation of seven remaining urbs wastes memory for nothing.
Reviewed-by: Pavel Skripkin <paskripkin@gmail.com>
Signed-off-by: Ivan Safonov <insafonov@gmail.com>
Link: https://lore.kernel.org/r/20220417163608.42917-1-insafonov@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/include/rtw_xmit.h

@@ -198,7 +198,7 @@ struct xmit_buf {
 	u32  len;
 	struct submit_ctx *sctx;
 	u32	ff_hwaddr;
-	struct urb *pxmit_urb[8];
+	struct urb *pxmit_urb;
 	dma_addr_t dma_transfer_addr;	/* (in) dma addr for transfer_buffer */
 	u8 bpending[8];
 	int last[8];

drivers/staging/r8188eu/os_dep/usb_ops_linux.c

@@ -140,7 +140,7 @@ u32 rtw_write_port(struct adapter *padapter, u32 addr, u32 cnt, u8 *wmem)
 
 	spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
 
-	purb	= pxmitbuf->pxmit_urb[0];
+	purb	= pxmitbuf->pxmit_urb;
 
 	/* translate DMA FIFO addr to pipehandle */
 	pipe = ffaddr2pipehdl(pdvobj, addr);
@@ -178,25 +178,21 @@ u32 rtw_write_port(struct adapter *padapter, u32 addr, u32 cnt, u8 *wmem)
 
 void rtw_write_port_cancel(struct adapter *padapter)
 {
-	int i, j;
+	int i;
 	struct xmit_buf *pxmitbuf = (struct xmit_buf *)padapter->xmitpriv.pxmitbuf;
 
 	padapter->bWritePortCancel = true;
 
 	for (i = 0; i < NR_XMITBUFF; i++) {
-		for (j = 0; j < 8; j++) {
-			if (pxmitbuf->pxmit_urb[j])
-				usb_kill_urb(pxmitbuf->pxmit_urb[j]);
-		}
+		if (pxmitbuf->pxmit_urb)
+			usb_kill_urb(pxmitbuf->pxmit_urb);
 		pxmitbuf++;
 	}
 
 	pxmitbuf = (struct xmit_buf *)padapter->xmitpriv.pxmit_extbuf;
 	for (i = 0; i < NR_XMIT_EXTBUFF; i++) {
-		for (j = 0; j < 8; j++) {
-			if (pxmitbuf->pxmit_urb[j])
-				usb_kill_urb(pxmitbuf->pxmit_urb[j]);
-		}
+		if (pxmitbuf->pxmit_urb)
+			usb_kill_urb(pxmitbuf->pxmit_urb);
 		pxmitbuf++;
 	}
 }

drivers/staging/r8188eu/os_dep/xmit_linux.c

@@ -67,8 +67,6 @@ bool rtw_endofpktfile(struct pkt_file *pfile)
 
 int rtw_os_xmit_resource_alloc(struct adapter *padapter, struct xmit_buf *pxmitbuf, u32 alloc_sz)
 {
-	int i;
-
 	pxmitbuf->pallocated_buf = kzalloc(alloc_sz, GFP_KERNEL);
 	if (!pxmitbuf->pallocated_buf)
 		return _FAIL;
@@ -76,21 +74,17 @@ int rtw_os_xmit_resource_alloc(struct adapter *padapter, struct xmit_buf *pxmitb
 	pxmitbuf->pbuf = (u8 *)N_BYTE_ALIGMENT((size_t)(pxmitbuf->pallocated_buf), XMITBUF_ALIGN_SZ);
 	pxmitbuf->dma_transfer_addr = 0;
 
-	for (i = 0; i < 8; i++) {
-		pxmitbuf->pxmit_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
-		if (!pxmitbuf->pxmit_urb[i])
-			return _FAIL;
-	}
+	pxmitbuf->pxmit_urb = usb_alloc_urb(0, GFP_KERNEL);
+	if (!pxmitbuf->pxmit_urb)
+		return _FAIL;
+
 	return _SUCCESS;
 }
 
 void rtw_os_xmit_resource_free(struct adapter *padapter,
 			       struct xmit_buf *pxmitbuf, u32 free_sz)
 {
-	int i;
-
-	for (i = 0; i < 8; i++)
-		usb_free_urb(pxmitbuf->pxmit_urb[i]);
+	usb_free_urb(pxmitbuf->pxmit_urb);
 
 	kfree(pxmitbuf->pallocated_buf);
 }