diff options
Diffstat (limited to 'drivers/mtd/spi-nor/intel-spi.c')
| -rw-r--r-- | drivers/mtd/spi-nor/intel-spi.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/mtd/spi-nor/intel-spi.c b/drivers/mtd/spi-nor/intel-spi.c index af0a22019516..1ccf23fe7e4b 100644 --- a/drivers/mtd/spi-nor/intel-spi.c +++ b/drivers/mtd/spi-nor/intel-spi.c @@ -1,12 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Intel PCH/PCU SPI flash driver. * * Copyright (C) 2016, Intel Corporation * Author: Mika Westerberg <mika.westerberg@linux.intel.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #include <linux/err.h> @@ -632,6 +629,10 @@ static ssize_t intel_spi_read(struct spi_nor *nor, loff_t from, size_t len, while (len > 0) { block_size = min_t(size_t, len, INTEL_SPI_FIFO_SZ); + /* Read cannot cross 4K boundary */ + block_size = min_t(loff_t, from + block_size, + round_up(from + 1, SZ_4K)) - from; + writel(from, ispi->base + FADDR); val = readl(ispi->base + HSFSTS_CTL); @@ -685,6 +686,10 @@ static ssize_t intel_spi_write(struct spi_nor *nor, loff_t to, size_t len, while (len > 0) { block_size = min_t(size_t, len, INTEL_SPI_FIFO_SZ); + /* Write cannot cross 4K boundary */ + block_size = min_t(loff_t, to + block_size, + round_up(to + 1, SZ_4K)) - to; + writel(to, ispi->base + FADDR); val = readl(ispi->base + HSFSTS_CTL); |