From: Saeed Mahameed <>
Date: Tue, 10 Apr 2018 10:08:12 -0700

> Instead of holding the device chain read_lock also while calling
> dev_get_stats just hold it only to check dev_isalive, if the dev is alive,
> hold that dev via dev_hold then release the read_lock.
> When done handling the device, dev_put it.
> Signed-off-by: Saeed Mahameed <>

My feedback here is that same as for patch #1.

Two atomics for a shorter RCU lock hold time is not that great of
a tradeoff.

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