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authorDan Carpenter <dan.carpenter@oracle.com>2019-06-24 16:47:17 +0300
committerBorislav Petkov <bp@suse.de>2019-08-07 11:37:34 +0300
commit8faa1cf6ed82f33009f63986c3776cc48af1b7b2 (patch)
treeb04fdf89d6b3600dd360371aa67e8b4920fc9d6f
parent3724ace582d9f675134985727fd5e9811f23c059 (diff)
downloadlinux-8faa1cf6ed82f33009f63986c3776cc48af1b7b2.tar.xz
EDAC/altera: Use the proper type for the IRQ status bits
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.carpenter@oracle.com> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Thor Thayer <thor.thayer@linux.intel.com> Cc: James Morse <james.morse@arm.com> Cc: kernel-janitors@vger.kernel.org Cc: linux-edac <linux-edac@vger.kernel.org> Cc: Mauro Carvalho Chehab <mchehab@kernel.org> Cc: Tony Luck <tony.luck@intel.com> Link: https://lkml.kernel.org/r/20190624134717.GA1754@mwanda
-rw-r--r--drivers/edac/altera_edac.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/edac/altera_edac.c b/drivers/edac/altera_edac.c
index 09a80b53acea..fbda4b876afd 100644
--- a/drivers/edac/altera_edac.c
+++ b/drivers/edac/altera_edac.c
@@ -1886,6 +1886,7 @@ 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 :
@@ -1895,7 +1896,8 @@ 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);