The patch below does not apply to the 4.18-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@xxxxxxxxxxxxxxx>.
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@xxxxxxxxx>
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@xxxxxxxxx>
Fixes: ebd71e3a4861 ("mtd: maps: gpio-addr-flash: fix warnings and make more portable")
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxx>
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;
