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Date:   Mon, 24 Aug 2020 15:38:47 -0700 (PDT)
From:   David Miller <>
Subject: Re: [PATCH v3] ravb: Fixed to be able to unload modules

From: Yuusuke Ashizuka <>
Date: Thu, 20 Aug 2020 18:43:07 +0900

> When this driver is built as a module, I cannot rmmod it after insmoding
> it.
> This is because that this driver calls ravb_mdio_init() at the time of
> probe, and module->refcnt is incremented by alloc_mdio_bitbang() called
> after that.
> Therefore, even if ifup is not performed, the driver is in use and rmmod
> cannot be performed.
> $ lsmod
> Module                  Size  Used by
> ravb                   40960  1
> $ rmmod ravb
> rmmod: ERROR: Module ravb is in use
> Call ravb_mdio_init() at open and free_mdio_bitbang() at close, thereby
> rmmod is possible in the ifdown state.
> Fixes: c156633f1353 ("Renesas Ethernet AVB driver proper")
> Signed-off-by: Yuusuke Ashizuka <>
> Reviewed-by: Sergei Shtylyov <>

Applied and queued up for -stable, thanks.

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