From: Jamie Iles quic_jiles@quicinc.com
[ Upstream commit f18f98110f2b179792cb70d85cba697320a3790f ]
The address slot bitmap is an array of unsigned long's which are the same size as an int on 32-bit platforms but not 64-bit. Loading the bitmap into an int could result in the incorrect status being returned for a slot and slots being reported as the wrong status.
Fixes: 3a379bbcea0a ("i3c: Add core I3C infrastructure") Cc: Boris Brezillon bbrezillon@kernel.org Cc: Alexandre Belloni alexandre.belloni@bootlin.com Signed-off-by: Jamie Iles quic_jiles@quicinc.com Signed-off-by: Alexandre Belloni alexandre.belloni@bootlin.com Link: https://lore.kernel.org/r/20210922165600.179394-1-quic_jiles@quicinc.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/i3c/master.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c index c3b4c677b4429..dfe18dcd008d4 100644 --- a/drivers/i3c/master.c +++ b/drivers/i3c/master.c @@ -343,7 +343,8 @@ struct bus_type i3c_bus_type = { static enum i3c_addr_slot_status i3c_bus_get_addr_slot_status(struct i3c_bus *bus, u16 addr) { - int status, bitpos = addr * 2; + unsigned long status; + int bitpos = addr * 2;
if (addr > I2C_MAX_ADDR) return I3C_ADDR_SLOT_RSVD;