The patch below does not apply to the 4.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 6c925b333368cda4e1b0513b07f72316c0e7edd7 Mon Sep 17 00:00:00 2001

From: Ricardo Ribalda Delgado ricardo.ribalda@gmail.com Date: Thu, 4 Oct 2018 15:01:04 +0200 Subject: [PATCH] mtd: maps: gpio-addr-flash: Fix ioremapped size

We should only iomap the area of the chip that is memory mapped. Otherwise we could be mapping devices beyond the memory space or that belong to other devices.

Signed-off-by: Ricardo Ribalda Delgado ricardo.ribalda@gmail.com Fixes: ebd71e3a4861 ("mtd: maps: gpio-addr-flash: fix warnings and make more portable") Cc: stable@vger.kernel.org Signed-off-by: Boris Brezillon boris.brezillon@bootlin.com

diff --git a/drivers/mtd/maps/gpio-addr-flash.c b/drivers/mtd/maps/gpio-addr-flash.c index 17be47f72973..6de16e81994c 100644 --- a/drivers/mtd/maps/gpio-addr-flash.c +++ b/drivers/mtd/maps/gpio-addr-flash.c @@ -234,7 +234,7 @@ static int gpio_flash_probe(struct platform_device *pdev) state->map.copy_to = gf_copy_to; state->map.bankwidth = pdata->width; state->map.size = state->win_size * (1 << state->gpio_count); - state->map.virt = ioremap_nocache(memory->start, state->map.size); + state->map.virt = ioremap_nocache(memory->start, state->win_size); if (!state->map.virt) return -ENOMEM;