[MTD] OneNAND: Invalidate bufferRAM after erase

[linux-2.6-omap-h63xx.git] / drivers / mtd / onenand / onenand_base.c

diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
index 779327b845d19e1b83a8867a1e5dac59d6d5df01..a7645794364c5b01b8ee9e84ae523c1401f02c61 100644 (file)
--- a/drivers/mtd/onenand/onenand_base.c
+++ b/drivers/mtd/onenand/onenand_base.c
@@ -635,6 +635,29 @@ static void onenand_update_bufferram(struct mtd_info *mtd, loff_t addr,
                this->bufferram[i].blockpage = -1;
 }
 
+/**
+ * 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
@@ -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) {