From: Dan Carpenter <dan.carpen...@oracle.com>
[ Upstream commit 8faa1cf6ed82f33009f63986c3776cc48af1b7b2 ]
Smatch complains about the cast of a u32 pointer to unsigned long:
drivers/edac/altera_edac.c:1878 altr_edac_a10_irq_handler()
warn: passing casted pointer '&irq_status' to 'find_first_bit()'
This code wouldn't work on a 64 bit big endian system because it would
read past the end of &irq_status.
[ bp: massage. ]
Fixes: 13ab8448d2c9 ("EDAC, altera: Add ECC Manager IRQ controller support")
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>
Signed-off-by: Borislav Petkov <b...@suse.de>
Reviewed-by: Thor Thayer <thor.tha...@linux.intel.com>
Cc: James Morse <james.mo...@arm.com>
Cc: kernel-janit...@vger.kernel.org
Cc: linux-edac <linux-e...@vger.kernel.org>
Cc: Mauro Carvalho Chehab <mche...@kernel.org>
Cc: Tony Luck <tony.l...@intel.com>
Link: https://lkml.kernel.org/r/20190624134717.GA1754@mwanda
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
drivers/edac/altera_edac.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/edac/altera_edac.c b/drivers/edac/altera_edac.c
index 38983f56ad0dd..d92090b127de7 100644
--- a/drivers/edac/altera_edac.c
+++ b/drivers/edac/altera_edac.c
@@ -1646,6 +1646,7 @@ static void altr_edac_a10_irq_handler(struct irq_desc
*desc)
struct altr_arria10_edac *edac = irq_desc_get_handler_data(desc);
struct irq_chip *chip = irq_desc_get_chip(desc);
int irq = irq_desc_get_irq(desc);
+ unsigned long bits;
dberr = (irq == edac->db_irq) ? 1 : 0;
sm_offset = dberr ? A10_SYSMGR_ECC_INTSTAT_DERR_OFST :
@@ -1655,7 +1656,8 @@ static void altr_edac_a10_irq_handler(struct irq_desc
*desc)
regmap_read(edac->ecc_mgr_map, sm_offset, &irq_status);
- for_each_set_bit(bit, (unsigned long *)&irq_status, 32) {
+ bits = irq_status;
+ for_each_set_bit(bit, &bits, 32) {
irq = irq_linear_revmap(edac->domain, dberr * 32 + bit);
if (irq)
generic_handle_irq(irq);
--
2.20.1
