From: Poddar, Sourav <sourav.poddar@ti.com>
Date: Thu, 14 Nov 2013 15:31:15 +0000 (+0530)
Subject: driver: mtd: sf_ops: claim bus while doing memcpy
X-Git-Tag: v2014.01-rc3~29^2
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=ac5cce38de8f97a120b8c98f34be0d5eec50a6fb;p=oweals%2Fu-boot.git

driver: mtd: sf_ops: claim bus while doing memcpy

claim spi bus while doing memory copy, this will set up
the spi controller device control register before doing
a memory read.

Signed-off-by: Sourav Poddar <sourav.poddar@ti.com>
Tested-by: Yebio Mesfin <ymesfin@ti.com>
Reviewed-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
---

diff --git a/drivers/mtd/spi/sf_ops.c b/drivers/mtd/spi/sf_ops.c
index 108665f441..e316a692a8 100644
--- a/drivers/mtd/spi/sf_ops.c
+++ b/drivers/mtd/spi/sf_ops.c
@@ -273,9 +273,15 @@ int spi_flash_cmd_read_ops(struct spi_flash *flash, u32 offset,
 
 	/* Handle memory-mapped SPI */
 	if (flash->memory_map) {
+		ret = spi_claim_bus(flash->spi);
+		if (ret) {
+			debug("SF: unable to claim SPI bus\n");
+			return ret;
+		}
 		spi_xfer(flash->spi, 0, NULL, NULL, SPI_XFER_MMAP);
 		memcpy(data, flash->memory_map + offset, len);
 		spi_xfer(flash->spi, 0, NULL, NULL, SPI_XFER_MMAP_END);
+		spi_release_bus(flash->spi);
 		return 0;
 	}