ide: add ide_read_error() inline helper

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/include/linux/ide.h b/include/linux/ide.h
index d212492..acec99d 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -1323,4 +1323,11 @@
 	return hwif->INB(hwif->io_ports[IDE_CONTROL_OFFSET]);
 }
 
+static inline u8 ide_read_error(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+
+	return hwif->INB(hwif->io_ports[IDE_ERROR_OFFSET]);
+}
+
 #endif /* _IDE_H */