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i3c: fix incorrect address slot lookup on 64-bit 

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: 3a379bbcea ("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
This commit is contained in:
Jamie Iles 2021-09-22 17:56:00 +01:00 committed by Alexandre Belloni
parent 313ece2260
commit f18f98110f
1 changed files with 2 additions and 1 deletions
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3
drivers/i3c/master.c
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@ -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;