staging: r8188eu: use a local buffer for efuse data

The efuse_eeprom_data array in struct eeprom_priv is used only by
ReadAdapterInfo8188EU. We can remove efuse_eeprom_data and use a local
buffer instead.

Use EFUSE_MAP_LEN_88E as buffer size. Its value is the same as
HWSET_MAX_SIZE_512. The functions that access the buffer use
EFUSE_MAP_LEN_88E for its size.
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220709171000.180481-6-martin@kaiser.cxSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/hal/usb_halinit.c

@@ -929,6 +929,7 @@ void ReadAdapterInfo8188EU(struct adapter *Adapter)
 {
 	struct eeprom_priv *eeprom = &Adapter->eeprompriv;
 	struct led_priv *ledpriv = &Adapter->ledpriv;
+	u8 efuse_buf[EFUSE_MAP_LEN_88E] __aligned(4);
 	u8 eeValue;
 	int res;
 
@@ -941,24 +942,24 @@ void ReadAdapterInfo8188EU(struct adapter *Adapter)
 
 	if (!(eeValue & BOOT_FROM_EEPROM)) {
 		if (eeprom->bautoload_fail_flag) {
-			memset(eeprom->efuse_eeprom_data, 0xFF, EFUSE_MAP_LEN_88E);
+			memset(efuse_buf, 0xFF, sizeof(efuse_buf));
 		} else {
 			rtl8188e_EfusePowerSwitch(Adapter, true);
-			rtl8188e_ReadEFuse(Adapter, 0, EFUSE_MAP_LEN_88E, eeprom->efuse_eeprom_data);
+			rtl8188e_ReadEFuse(Adapter, 0, EFUSE_MAP_LEN_88E, efuse_buf);
 			rtl8188e_EfusePowerSwitch(Adapter, false);
 		}
 	}
 
 	/* parse the eeprom/efuse content */
-	Hal_EfuseParseIDCode88E(Adapter, eeprom->efuse_eeprom_data);
-	Hal_EfuseParseMACAddr_8188EU(Adapter, eeprom->efuse_eeprom_data, eeprom->bautoload_fail_flag);
-
-	Hal_ReadPowerSavingMode88E(Adapter, eeprom->efuse_eeprom_data, eeprom->bautoload_fail_flag);
-	Hal_ReadTxPowerInfo88E(Adapter, eeprom->efuse_eeprom_data, eeprom->bautoload_fail_flag);
-	rtl8188e_EfuseParseChnlPlan(Adapter, eeprom->efuse_eeprom_data, eeprom->bautoload_fail_flag);
-	Hal_EfuseParseXtal_8188E(Adapter, eeprom->efuse_eeprom_data, eeprom->bautoload_fail_flag);
-	Hal_ReadAntennaDiversity88E(Adapter, eeprom->efuse_eeprom_data, eeprom->bautoload_fail_flag);
-	Hal_ReadThermalMeter_88E(Adapter, eeprom->efuse_eeprom_data, eeprom->bautoload_fail_flag);
+	Hal_EfuseParseIDCode88E(Adapter, efuse_buf);
+	Hal_EfuseParseMACAddr_8188EU(Adapter, efuse_buf, eeprom->bautoload_fail_flag);
+
+	Hal_ReadPowerSavingMode88E(Adapter, efuse_buf, eeprom->bautoload_fail_flag);
+	Hal_ReadTxPowerInfo88E(Adapter, efuse_buf, eeprom->bautoload_fail_flag);
+	rtl8188e_EfuseParseChnlPlan(Adapter, efuse_buf, eeprom->bautoload_fail_flag);
+	Hal_EfuseParseXtal_8188E(Adapter, efuse_buf, eeprom->bautoload_fail_flag);
+	Hal_ReadAntennaDiversity88E(Adapter, efuse_buf, eeprom->bautoload_fail_flag);
+	Hal_ReadThermalMeter_88E(Adapter, efuse_buf, eeprom->bautoload_fail_flag);
 
 	ledpriv->bRegUseLed = true;
 }

drivers/staging/r8188eu/include/rtw_eeprom.h

@@ -7,12 +7,9 @@
 #include "osdep_service.h"
 #include "drv_types.h"
 
-#define	HWSET_MAX_SIZE_512		512
-
 struct eeprom_priv {
 	u8		bautoload_fail_flag;
 	u8		mac_addr[ETH_ALEN] __aligned(2); /* PermanentAddress */
-	u8		efuse_eeprom_data[HWSET_MAX_SIZE_512] __aligned(4);
 };
 
 #endif  /* __RTL871X_EEPROM_H__ */