Re: [PATCH 1/3 v2] crypto: caam - fix possible deadlock condition

On Fri, Jul 13, 2012 at 06:04:23PM -0500, Kim Phillips wrote:

commit "crypto: caam - use non-irq versions of spinlocks for job rings"
made two bad assumptions:

(a) The caam_jr_enqueue lock isn't used in softirq context.
Not true: jr_enqueue can be interrupted by an incoming net
interrupt and the received packet may be sent for encryption,
via caam_jr_enqueue in softirq context, thereby inducing a
deadlock.

This is evidenced when running netperf over an IPSec tunnel
between two P4080's, with spinlock debugging turned on:

All patches applied.  Thanks Kim.
-- 
Email: Herbert Xu [off-list ref]
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