1 files changed, 25 insertions, 0 deletions

diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
index 779327b845d1..a7645794364c 100644
--- a/drivers/mtd/onenand/onenand_base.c
+++ b/drivers/mtd/onenand/onenand_base.c
@@ -636,6 +636,29 @@ static void onenand_update_bufferram(struct mtd_info *mtd, loff_t addr,
 }
 
 /**
+ * onenand_invalidate_bufferram - [GENERIC] Invalidate BufferRAM information
+ * @param mtd           MTD data structure
+ * @param addr          start address to invalidate
+ * @param len           length to invalidate
+ *
+ * Invalidate BufferRAM information
+ */
+static void onenand_invalidate_bufferram(struct mtd_info *mtd, loff_t addr,
+                unsigned int len)
+{
+        struct onenand_chip *this = mtd->priv;
+        int i;
+        loff_t end_addr = addr + len;
+
+        /* Invalidate BufferRAM */
+        for (i = 0; i < MAX_BUFFERRAM; i++) {
+                loff_t buf_addr = this->bufferram[i].blockpage << this->page_shift;
+                if (buf_addr >= addr && buf_addr < end_addr)
+                        this->bufferram[i].blockpage = -1;
+        }
+}
+
+/**
  * onenand_get_device - [GENERIC] Get chip for selected access
  * @param mtd           MTD device structure
  * @param new_state     the state which is requested
@@ -1476,6 +1499,8 @@ static int onenand_erase(struct mtd_info *mtd, struct erase_info *instr)
 
                 this->command(mtd, ONENAND_CMD_ERASE, addr, block_size);
 
+                onenand_invalidate_bufferram(mtd, addr, block_size);
+
                 ret = this->wait(mtd, FL_ERASING);
                 /* Check, if it is write protected */
                 if (ret) {