Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

Pull i2c fixes from Wolfram Sang:
 "Two bugfixes for the I2C subsystem"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: mpc: Poll for MCF
  misc: eeprom: at24: Always append device id even if label property is set.

Author: torvalds

drivers/i2c/busses/i2c-mpc.c

@@ -635,8 +635,8 @@ static irqreturn_t mpc_i2c_isr(int irq, void *dev_id)
 
 	status = readb(i2c->base + MPC_I2C_SR);
 	if (status & CSR_MIF) {
-		/* Read again to allow register to stabilise */
-		status = readb(i2c->base + MPC_I2C_SR);
+		/* Wait up to 100us for transfer to properly complete */
+		readb_poll_timeout(i2c->base + MPC_I2C_SR, status, !(status & CSR_MCF), 0, 100);
 		writeb(0, i2c->base + MPC_I2C_SR);
 		mpc_i2c_do_intr(i2c, status);
 		return IRQ_HANDLED;

drivers/misc/eeprom/at24.c

@@ -714,23 +714,20 @@ static int at24_probe(struct i2c_client *client)
 	}
 
 	/*
-	 * If the 'label' property is not present for the AT24 EEPROM,
-	 * then nvmem_config.id is initialised to NVMEM_DEVID_AUTO,
-	 * and this will append the 'devid' to the name of the NVMEM
-	 * device. This is purely legacy and the AT24 driver has always
-	 * defaulted to this. However, if the 'label' property is
-	 * present then this means that the name is specified by the
-	 * firmware and this name should be used verbatim and so it is
-	 * not necessary to append the 'devid'.
+	 * We initialize nvmem_config.id to NVMEM_DEVID_AUTO even if the
+	 * label property is set as some platform can have multiple eeproms
+	 * with same label and we can not register each of those with same
+	 * label. Failing to register those eeproms trigger cascade failure
+	 * on such platform.
 	 */
+	nvmem_config.id = NVMEM_DEVID_AUTO;
+
 	if (device_property_present(dev, "label")) {
-		nvmem_config.id = NVMEM_DEVID_NONE;
 		err = device_property_read_string(dev, "label",
 						  &nvmem_config.name);
 		if (err)
 			return err;
 	} else {
-		nvmem_config.id = NVMEM_DEVID_AUTO;
 		nvmem_config.name = dev_name(dev);
 	}