From: Baruch Siach baruch@tkos.co.il
[ Upstream commit 3884f03edd34887514a0865a80769cd5362d5c3b ]
mtd-ram can potentially be larger than 4GB. get_bitmask_order() uses fls() that is not guaranteed to work with values larger than 32-bit. Specifically on aarch64 fls() returns 0 when all 32 LSB bits are clear. Use fls64() instead.
Fixes: ba32ce95cbd987 ("mtd: maps: Merge gpio-addr-flash.c into physmap-core.c") Signed-off-by: Baruch Siach baruch@tkos.co.il Signed-off-by: Miquel Raynal miquel.raynal@bootlin.com Link: https://lore.kernel.org/linux-mtd/9fbf3664ce00f8b07867f1011834015f21d162a5.1... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/mtd/maps/physmap-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/mtd/maps/physmap-core.c b/drivers/mtd/maps/physmap-core.c index 746a27d15d440..96eb2e782c382 100644 --- a/drivers/mtd/maps/physmap-core.c +++ b/drivers/mtd/maps/physmap-core.c @@ -518,7 +518,7 @@ static int physmap_flash_probe(struct platform_device *dev) if (!info->maps[i].phys) info->maps[i].phys = res->start;
- info->win_order = get_bitmask_order(resource_size(res)) - 1; + info->win_order = fls64(resource_size(res)) - 1; info->maps[i].size = BIT(info->win_order + (info->gpios ? info->gpios->ndescs : 0));