[PATCH] ppc/pnv: Fix potential overflow in I2C model

[Cédric Le Goater]

Coverity warns that "i2c_bus_busy(i2c->busses[i]) << 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 1523918
Cc: Glenn Miles <milesg@linux.vnet.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 hw/ppc/pnv_i2c.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/ppc/pnv_i2c.c b/hw/ppc/pnv_i2c.c
index f75e59e70977..ab73c59f7704 100644
--- a/hw/ppc/pnv_i2c.c
+++ b/hw/ppc/pnv_i2c.c
@@ -437,7 +437,7 @@ static uint64_t pnv_i2c_xscom_read(void *opaque, hwaddr 
addr,
     case I2C_PORT_BUSY_REG: /* compute busy bit for each port  */
         val = 0;
         for (i = 0; i < i2c->num_busses; i++) {
-            val |= i2c_bus_busy(i2c->busses[i]) << i;
+            val |= (uint64_t) i2c_bus_busy(i2c->busses[i]) << i;
         }
         break;
 
-- 
2.41.0