From ac5cce38de8f97a120b8c98f34be0d5eec50a6fb Mon Sep 17 00:00:00 2001 From: "Poddar, Sourav" Date: Thu, 14 Nov 2013 21:01:15 +0530 Subject: [PATCH] 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 Tested-by: Yebio Mesfin Reviewed-by: Jagannadha Sutradharudu Teki --- drivers/mtd/spi/sf_ops.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/mtd/spi/sf_ops.c b/drivers/mtd/spi/sf_ops.c index 108665f..e316a69 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; } -- 2.7.4