CVE-2022-49192 drivers: ethernet: cpsw: fix panic when interrupt coaleceing is set via ethtool

In the Linux kernel, the following vulnerability has been resolved: drivers: ethernet: cpsw: fix panic when interrupt coaleceing is set via ethtool cpswethtoolbegin directly returns the result of pmruntimegetsync when successful. pmruntimegetsync returns -error code on failure and 0 on successful...