diff --git a/arch/powerpc/cpu/mpc512x/i2c.c b/arch/powerpc/cpu/mpc512x/i2c.c
index e2d9097..0ea1280 100644
--- a/arch/powerpc/cpu/mpc512x/i2c.c
+++ b/arch/powerpc/cpu/mpc512x/i2c.c
@@ -78,9 +78,8 @@
 	status = mpc_reg_in (&regs->msr);
 
 	while (timeout-- && (status & I2C_BB)) {
-		volatile int temp;
 		mpc_reg_out (&regs->mcr, I2C_STA, I2C_STA);
-		temp = mpc_reg_in (&regs->mdr);
+		(void)mpc_reg_in(&regs->mdr);
 		mpc_reg_out (&regs->mcr, 0, I2C_STA);
 		mpc_reg_out (&regs->mcr, 0, 0);
 		mpc_reg_out (&regs->mcr, I2C_EN, 0);