powerpc: Allow non-hcall return values for lparcfg writes

The code to handle writes to /proc/ppc64/lparcfg incorrectly
assumes that the return code from the helper routines to update
processor or memory entitlement return a hcall return value. It
then assumes any non-hcall return value is bad and sets the return
code for the write to be -EIO.

The update_[mp]pp routines can return values other than a hcall
return value. This patch removes the automatic setting of any
return code that is not an hcall return value from these routines
to -EIO.
Signed-off-by: NNathan Fontenot <nfont@austin.ibm.com>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/kernel/lparcfg.c

@@ -636,10 +636,6 @@ static ssize_t lparcfg_write(struct file *file, const char __user * buf,
 		retval = -EIO;
 	} else if (retval == H_PARAMETER) {
 		retval = -EINVAL;
-	} else {
-		printk(KERN_WARNING "%s: received unknown hv return code %ld",
-		       __func__, retval);
-		retval = -EIO;
 	}
 
 	return retval;