netdev - Re: [PATCH] RDSRDMA: Fix cleanup of rds_iw_mr

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Message-Id: <20110929.145753.1706155272362887387.davem@davemloft.net>
Date:	Thu, 29 Sep 2011 14:57:53 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	jonathan@....us
Cc:	venkat.x.venkatsubra@...cle.com, netdev@...r.kernel.org
Subject: Re: [PATCH] RDSRDMA: Fix cleanup of rds_iw_mr_pool

From: Jonathan Lallinger <jonathan@....us>
Date: Thu, 29 Sep 2011 12:58:41 -0500

> In the rds_iw_mr_pool struct the free_pinned field keeps track of
> memory pinned by free MRs. While this field is incremented properly
> upon allocation, it is never decremented upon unmapping. This would
> cause the rds_rdma module to crash the kernel upon unloading, by
> triggering the BUG_ON in the rds_iw_destroy_mr_pool function.
> 
> This change keeps track of the MRs that become unpinned, so that
> free_pinned can be decremented appropriately.
> 
> Signed-off-by: Jonathan Lallinger <jonathan@....us>
> Signed-off-by: Steve Wise <swise@....us>

Applied.
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