linux-kernel - Re: [PATCH v1] ibmvnic: remove excessive irqsave

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Date:   Fri, 05 Mar 2021 21:10:09 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     angkery <angkery@....com>
Cc:     mpe@...erman.id.au, benh@...nel.crashing.org, paulus@...ba.org,
        drt@...ux.ibm.com, ljp@...ux.ibm.com, sukadev@...ux.ibm.com,
        davem@...emloft.net, kuba@...nel.org,
        linuxppc-dev@...ts.ozlabs.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, yangjunlin@...ong.com
Subject: Re: [PATCH v1] ibmvnic: remove excessive irqsave

Hello:

This patch was applied to netdev/net.git (refs/heads/master):

On Fri,  5 Mar 2021 16:48:39 +0800 you wrote:
> From: Junlin Yang <yangjunlin@...ong.com>
> 
> ibmvnic_remove locks multiple spinlocks while disabling interrupts:
> spin_lock_irqsave(&adapter->state_lock, flags);
> spin_lock_irqsave(&adapter->rwi_lock, flags);
> 
> As reported by coccinelle, the second _irqsave() overwrites the value
> saved in 'flags' by the first _irqsave(),   therefore when the second
> _irqrestore() comes,the value in 'flags' is not valid,the value saved
> by the first _irqsave() has been lost.
> This likely leads to IRQs remaining disabled. So remove the second
> _irqsave():
> spin_lock_irqsave(&adapter->state_lock, flags);
> spin_lock(&adapter->rwi_lock);
> 
> [...]

Here is the summary with links:
  - [v1] ibmvnic: remove excessive irqsave
    https://git.kernel.org/netdev/net/c/69cdb7947adb

You are awesome, thank you!
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