From 63b2de12b7eeacfb2edbe005f5c3cff17a2a02e2 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Mon, 17 Jun 2019 22:06:05 +0300
Subject: [PATCH] mfd: stmfx: Fix an endian bug in stmfx_irq_handler()
It's not okay to cast a "u32 *" to "unsigned long *" when you are
doing a for_each_set_bit() loop because that will break on big
endian systems.
Fixes: 386145601b82 ("mfd: stmfx: Uninitialized variable in stmfx_irq_handler()")
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Tested-by: Amelie Delaunay <amelie.delaunay@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
drivers/mfd/stmfx.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/mfd/stmfx.c b/drivers/mfd/stmfx.c
index 7c419c078688e..857991cb3cbb8 100644
--- a/drivers/mfd/stmfx.c
+++ b/drivers/mfd/stmfx.c
@@ -204,6 +204,7 @@ static struct irq_chip stmfx_irq_chip = {
static irqreturn_t stmfx_irq_handler(int irq, void *data)
{
struct stmfx *stmfx = data;
+ unsigned long bits;
u32 pending, ack;
int n, ret;
@@ -222,7 +223,8 @@ static irqreturn_t stmfx_irq_handler(int irq, void *data)
return IRQ_NONE;
}
- for_each_set_bit(n, (unsigned long *)&pending, STMFX_REG_IRQ_SRC_MAX)
+ bits = pending;
+ for_each_set_bit(n, &bits, STMFX_REG_IRQ_SRC_MAX)
handle_nested_irq(irq_find_mapping(stmfx->irq_domain, n));
return IRQ_HANDLED;