[PATCH] mfd: stmfx: Fix an endian bug in stmfx_irq_handler()
From: Dan Carpenter <hidden>
Date: 2019-06-17 19:06:31
Also in:
kernel-janitors, lkml
Subsystem:
multifunction devices (mfd), the rest · Maintainers:
Lee Jones, Linus Torvalds
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.
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Fixes: 386145601b82 ("mfd: stmfx: Uninitialized variable in stmfx_irq_handler()")
Signed-off-by: Dan Carpenter <redacted>
---
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 7c419c078688..857991cb3cbb 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;
--
2.20.1
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