6.1-stable review patch. If anyone has any objections, please let me know.
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From: Frank Li Frank.Li@nxp.com
[ Upstream commit 16aed0a6520ba01b7d22c32e193fc1ec674f92d4 ]
Replace the hardcoded value 2, which indicates 2 bits for I3C address status, with the predefined macro I3C_ADDR_SLOT_STATUS_BITS.
Improve maintainability and extensibility of the code.
Reviewed-by: Miquel Raynal miquel.raynal@bootlin.com Signed-off-by: Frank Li Frank.Li@nxp.com Link: https://lore.kernel.org/r/20241021-i3c_dts_assign-v8-1-4098b8bde01e@nxp.com Signed-off-by: Alexandre Belloni alexandre.belloni@bootlin.com Stable-dep-of: 851bd21cdb55 ("i3c: master: Fix dynamic address leak when 'assigned-address' is present") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/i3c/master.c | 4 ++-- include/linux/i3c/master.h | 4 +++- 2 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c index 103d3383e176d..621881b6bf81c 100644 --- a/drivers/i3c/master.c +++ b/drivers/i3c/master.c @@ -344,7 +344,7 @@ static enum i3c_addr_slot_status i3c_bus_get_addr_slot_status(struct i3c_bus *bus, u16 addr) { unsigned long status; - int bitpos = addr * 2; + int bitpos = addr * I3C_ADDR_SLOT_STATUS_BITS;
if (addr > I2C_MAX_ADDR) return I3C_ADDR_SLOT_RSVD; @@ -358,7 +358,7 @@ i3c_bus_get_addr_slot_status(struct i3c_bus *bus, u16 addr) static void i3c_bus_set_addr_slot_status(struct i3c_bus *bus, u16 addr, enum i3c_addr_slot_status status) { - int bitpos = addr * 2; + int bitpos = addr * I3C_ADDR_SLOT_STATUS_BITS; unsigned long *ptr;
if (addr > I2C_MAX_ADDR) diff --git a/include/linux/i3c/master.h b/include/linux/i3c/master.h index 585b6c509802d..706a583c45efc 100644 --- a/include/linux/i3c/master.h +++ b/include/linux/i3c/master.h @@ -304,6 +304,8 @@ enum i3c_addr_slot_status { I3C_ADDR_SLOT_STATUS_MASK = 3, };
+#define I3C_ADDR_SLOT_STATUS_BITS 2 + /** * struct i3c_bus - I3C bus object * @cur_master: I3C master currently driving the bus. Since I3C is multi-master @@ -345,7 +347,7 @@ enum i3c_addr_slot_status { struct i3c_bus { struct i3c_dev_desc *cur_master; int id; - unsigned long addrslots[((I2C_MAX_ADDR + 1) * 2) / BITS_PER_LONG]; + unsigned long addrslots[((I2C_MAX_ADDR + 1) * I3C_ADDR_SLOT_STATUS_BITS) / BITS_PER_LONG]; enum i3c_bus_mode mode; struct { unsigned long i3c;