Merge tag 'i2c-for-6.9-rc6' of git://git.kernel.org/pub/scm/linux/ker…

…nel/git/wsa/linux

Pull i2c fixes from Wolfram Sang:
 "Fix a race condition in the at24 eeprom handler, a NULL pointer
  exception in the I2C core for controllers only using target modes,
  drop a MAINTAINERS entry, and fix an incorrect DT binding for at24"

* tag 'i2c-for-6.9-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: smbus: fix NULL function pointer dereference
  MAINTAINERS: Drop entry for PCA9541 bus master selector
  eeprom: at24: fix memory corruption race condition
  dt-bindings: eeprom: at24: Fix ST M24C64-D compatible schema

Documentation/devicetree/bindings/eeprom/at24.yaml

@@ -68,14 +68,10 @@ properties:
                   pattern: cs16$
               - items:
                   pattern: c32$
-              - items:
-                  pattern: c32d-wl$
               - items:
                   pattern: cs32$
               - items:
                   pattern: c64$
-              - items:
-                  pattern: c64d-wl$
               - items:
                   pattern: cs64$
               - items:
@@ -136,6 +132,7 @@ properties:
               - renesas,r1ex24128
               - samsung,s524ad0xd1
           - const: atmel,24c128
+      - pattern: '^atmel,24c(32|64)d-wl$' # Actual vendor is st
 
   label:
     description: Descriptive name of the EEPROM.

MAINTAINERS

@@ -16798,12 +16798,6 @@ S:	Maintained
 F:	drivers/leds/leds-pca9532.c
 F:	include/linux/leds-pca9532.h
 
-PCA9541 I2C BUS MASTER SELECTOR DRIVER
-M:	Guenter Roeck <linux@roeck-us.net>
-L:	linux-i2c@vger.kernel.org
-S:	Maintained
-F:	drivers/i2c/muxes/i2c-mux-pca9541.c
-
 PCI DRIVER FOR AARDVARK (Marvell Armada 3700)
 M:	Thomas Petazzoni <thomas.petazzoni@bootlin.com>
 M:	Pali Rohár <pali@kernel.org>

drivers/i2c/i2c-core-base.c

@@ -2200,13 +2200,18 @@ static int i2c_check_for_quirks(struct i2c_adapter *adap, struct i2c_msg *msgs,
  * Returns negative errno, else the number of messages executed.
  *
  * Adapter lock must be held when calling this function. No debug logging
- * takes place. adap->algo->master_xfer existence isn't checked.
+ * takes place.
  */
 int __i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
 {
 	unsigned long orig_jiffies;
 	int ret, try;
 
+	if (!adap->algo->master_xfer) {
+		dev_dbg(&adap->dev, "I2C level transfers not supported\n");
+		return -EOPNOTSUPP;
+	}
+
 	if (WARN_ON(!msgs || num < 1))
 		return -EINVAL;
 
@@ -2273,11 +2278,6 @@ int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
 {
 	int ret;
 
-	if (!adap->algo->master_xfer) {
-		dev_dbg(&adap->dev, "I2C level transfers not supported\n");
-		return -EOPNOTSUPP;
-	}
-
 	/* REVISIT the fault reporting model here is weak:
 	 *
 	 *  - When we get an error after receiving N bytes from a slave,

drivers/misc/eeprom/at24.c

@@ -758,15 +758,6 @@ static int at24_probe(struct i2c_client *client)
 	}
 	pm_runtime_enable(dev);
 
-	at24->nvmem = devm_nvmem_register(dev, &nvmem_config);
-	if (IS_ERR(at24->nvmem)) {
-		pm_runtime_disable(dev);
-		if (!pm_runtime_status_suspended(dev))
-			regulator_disable(at24->vcc_reg);
-		return dev_err_probe(dev, PTR_ERR(at24->nvmem),
-				     "failed to register nvmem\n");
-	}
-
 	/*
 	 * Perform a one-byte test read to verify that the chip is functional,
 	 * unless powering on the device is to be avoided during probe (i.e.
@@ -782,6 +773,15 @@ static int at24_probe(struct i2c_client *client)
 		}
 	}
 
+	at24->nvmem = devm_nvmem_register(dev, &nvmem_config);
+	if (IS_ERR(at24->nvmem)) {
+		pm_runtime_disable(dev);
+		if (!pm_runtime_status_suspended(dev))
+			regulator_disable(at24->vcc_reg);
+		return dev_err_probe(dev, PTR_ERR(at24->nvmem),
+				     "failed to register nvmem\n");
+	}
+
 	/* If this a SPD EEPROM, probe for DDR3 thermal sensor */
 	if (cdata == &at24_data_spd)
 		at24_probe_temp_sensor(client);