From: Jagannadha Sutradharudu Teki <jagannadha.sutradharudu-teki@xilinx.com>
Date: Mon, 30 Sep 2013 20:16:47 +0000 (+0530)
Subject: sf: Fix remain_len calculation in read ops
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=a7b1d249c5b68bb380a0d1fd9e7f5c61fc029bb4;p=thirdparty%2Fu-boot.git

sf: Fix remain_len calculation in read ops

remain_len must be subtracted with offset instead
of read_addr, by subtracting read_addr in remain_len
may leads incorrect behavior for dual parallel qspi's.

Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
Acked-by: Punnaiah Choudary Kalluri <punnaia@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
---

diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c
index 314391ba946..03f3cdb88a1 100644
--- a/drivers/mtd/spi/spi_flash.c
+++ b/drivers/mtd/spi/spi_flash.c
@@ -357,7 +357,7 @@ int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset,
 		if ((is_dual == MODE_DUAL_STACKED) && (flash->spi->u_page == 1))
 			bank_sel += ((flash->size / 2) / bank_boun);
 #endif
-		remain_len = (bank_boun * (bank_sel + 1) - read_addr);
+		remain_len = (bank_boun * (bank_sel + 1)) - offset;
 		if (len < remain_len)
 			read_len = len;
 		else