staging: r8188eu: use kmemdup instead of kzalloc and memcpy

Use kmemdup instead of kzalloc and memcpy in load_firmware().
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20220107103620.15648-10-straube.linux@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/hal/rtl8188e_hal_init.c

@@ -525,18 +525,13 @@ static int load_firmware(struct rt_firmware *rtfw, struct device *device)
 		ret = _FAIL;
 		goto exit;
 	}
-	if (fw->size > FW_8188E_SIZE) {
-		ret = _FAIL;
-		goto exit;
-	}
 
-	rtfw->data = kzalloc(FW_8188E_SIZE, GFP_KERNEL);
+	rtfw->data = kmemdup(fw->data, fw->size, GFP_KERNEL);
 	if (!rtfw->data) {
 		pr_err("Failed to allocate rtfw->data\n");
 		ret = _FAIL;
 		goto exit;
 	}
-	memcpy(rtfw->data, fw->data, fw->size);
 	rtfw->size = fw->size;
 	dev_dbg(device, "!bUsedWoWLANFw, FmrmwareLen:%d+\n", rtfw->size);
 

drivers/staging/r8188eu/include/rtl8188e_hal.h

@@ -35,7 +35,6 @@
 #define PageNum_128(_Len)	(u32)(((_Len)>>7) + ((_Len) & 0x7F ? 1 : 0))
 
 /*  download firmware related data structure */
-#define FW_8188E_SIZE			0x4000 /* 16384,16k */
 #define FW_8188E_START_ADDRESS		0x1000
 
 #define MAX_PAGE_SIZE			4096	/*  @ page : 4k bytes */