Re: [PATCH v2 net] net: dsa: microchip: Added the condition for scheduling ksz_mib_read_work

Hello:

This patch was applied to netdev/net.git (master)
by David S. Miller [off-list ref]:

On Mon, 11 Oct 2021 21:18:08 +0530 you wrote:

When the ksz module is installed and removed using rmmod, kernel crashes
with null pointer dereferrence error. During rmmod, ksz_switch_remove
function tries to cancel the mib_read_workqueue using
cancel_delayed_work_sync routine and unregister switch from dsa.

During dsa_unregister_switch it calls ksz_mac_link_down, which in turn
reschedules the workqueue since mib_interval is non-zero.
Due to which queue executed after mib_interval and it tries to access
dp->slave. But the slave is unregistered in the ksz_switch_remove
function. Hence kernel crashes.

[...]

Here is the summary with links:
  - [v2,net] net: dsa: microchip: Added the condition for scheduling ksz_mib_read_work
    https://git.kernel.org/netdev/net/c/ef1100ef20f2

You are awesome, thank you!
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