Improve the detection when to run atomic transfer handlers for kernels

with preemption disabled. This removes some false positive splats a
 number of users were seeing if their driver didn't have support for
 atomic transfers. Also, fix a typo in the docs while we are here.
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Merge tag 'i2c-for-6.7-final' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

Pull i2c fixes from Wolfram Sang:
 "Improve the detection when to run atomic transfer handlers for kernels
  with preemption disabled. This removes some false positive splats a
  number of users were seeing if their driver didn't have support for
  atomic transfers.

  Also, fix a typo in the docs while we are here"

* tag 'i2c-for-6.7-final' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: core: Fix atomic xfer check for non-preempt config
  Documentation/i2c: fix spelling error in i2c-address-translators

Documentation/i2c/i2c-address-translators.rst

@@ -71,7 +71,7 @@ Transaction:
  - Physical I2C transaction on bus A, slave address 0x20
  - ATR chip detects transaction on address 0x20, finds it in table,
    propagates transaction on bus B with address translated to 0x10,
-   keeps clock streched on bus A waiting for reply
+   keeps clock stretched on bus A waiting for reply
  - Slave X chip (on bus B) detects transaction at its own physical
    address 0x10 and replies normally
  - ATR chip stops clock stretching and forwards reply on bus A,

drivers/i2c/i2c-core.h

@@ -3,6 +3,7 @@
  * i2c-core.h - interfaces internal to the I2C framework
  */
 
+#include <linux/kconfig.h>
 #include <linux/rwsem.h>
 
 struct i2c_devinfo {
@@ -29,7 +30,8 @@ int i2c_dev_irq_from_resources(const struct resource *resources,
  */
 static inline bool i2c_in_atomic_xfer_mode(void)
 {
-	return system_state > SYSTEM_RUNNING && !preemptible();
+	return system_state > SYSTEM_RUNNING &&
+	       (IS_ENABLED(CONFIG_PREEMPT_COUNT) ? !preemptible() : irqs_disabled());
 }
 
 static inline int __i2c_lock_bus_helper(struct i2c_adapter *adap)