From: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
Date: Tue, 28 May 2013 10:29:57 +0000 (+0530)
Subject: sf: Fix dual stacked mode upper qspi read
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=1588eaa4788d6b81f820ada62e59dfb083afef78;p=thirdparty%2Fu-boot.git

sf: Fix dual stacked mode upper qspi read

For reading upper qspi in dual stacked mode, the remain_len logic
should have a bank_sel based on the total size of the flash, not
with half of total size.

Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
---

diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c
index af534670246..bd679bf5e49 100644
--- a/drivers/mtd/spi/spi_flash.c
+++ b/drivers/mtd/spi/spi_flash.c
@@ -209,6 +209,9 @@ int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset,
 			return ret;
 		}
 
+		if ((is_dual == MODE_DUAL_STACKED) && (flash->spi->u_page == 1))
+			bank_sel += ((flash->size / 2) / bank_boun);
+
 		remain_len = (bank_boun * (bank_sel + 1) - offset);
 		if (len < remain_len)
 			read_len = len;