[PATCH] aspeed/smc: Fix potential overflow

[Cédric Le Goater]

Coverity warns that "ssi_transfer(s->spi, 0U) << 8 * i" might overflow
because the expression is evaluated using 32-bit arithmetic and then
used in a context expecting a uint64_t.

Fixes: Coverity CID 1487244
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 hw/ssi/aspeed_smc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/ssi/aspeed_smc.c b/hw/ssi/aspeed_smc.c
index d2b1dde604e3..26640539ae64 100644
--- a/hw/ssi/aspeed_smc.c
+++ b/hw/ssi/aspeed_smc.c
@@ -490,7 +490,7 @@ static uint64_t aspeed_smc_flash_read(void *opaque, hwaddr 
addr, unsigned size)
     switch (aspeed_smc_flash_mode(fl)) {
     case CTRL_USERMODE:
         for (i = 0; i < size; i++) {
-            ret |= ssi_transfer(s->spi, 0x0) << (8 * i);
+            ret |= (uint64_t) ssi_transfer(s->spi, 0x0) << (8 * i);
         }
         break;
     case CTRL_READMODE:
@@ -499,7 +499,7 @@ static uint64_t aspeed_smc_flash_read(void *opaque, hwaddr 
addr, unsigned size)
         aspeed_smc_flash_setup(fl, addr);
 
         for (i = 0; i < size; i++) {
-            ret |= ssi_transfer(s->spi, 0x0) << (8 * i);
+            ret |= (uint64_t) ssi_transfer(s->spi, 0x0) << (8 * i);
         }
 
         aspeed_smc_flash_unselect(fl);
-- 
2.35.3