Patch "i3c: master: Replace hard code 2 with macro I3C_ADDR_SLOT_STATUS_BITS" has been added to the 6.12-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    i3c: master: Replace hard code 2 with macro I3C_ADDR_SLOT_STATUS_BITS

to the 6.12-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     i3c-master-replace-hard-code-2-with-macro-i3c_addr_s.patch
and it can be found in the queue-6.12 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 9427eccbcf87aa692cc332284dca70e8387c2a47
Author: Frank Li <Frank.Li@xxxxxxx>
Date:   Mon Oct 21 11:45:06 2024 -0400

    i3c: master: Replace hard code 2 with macro I3C_ADDR_SLOT_STATUS_BITS
    
    [ 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@xxxxxxxxxxx>
    Signed-off-by: Frank Li <Frank.Li@xxxxxxx>
    Link: https://lore.kernel.org/r/20241021-i3c_dts_assign-v8-1-4098b8bde01e@xxxxxxx
    Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx>
    Stable-dep-of: 851bd21cdb55 ("i3c: master: Fix dynamic address leak when 'assigned-address' is present")
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c
index da83c49223b33..53f3959e602c8 100644
--- a/drivers/i3c/master.c
+++ b/drivers/i3c/master.c
@@ -348,7 +348,7 @@ 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;
@@ -362,7 +362,7 @@ 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 2a1ed05d5782a..2100547b2d8d2 100644
--- a/include/linux/i3c/master.h
+++ b/include/linux/i3c/master.h
@@ -313,6 +313,8 @@ 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
@@ -354,7 +356,7 @@ 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;