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From: Vinod Koul <vkoul@kernel.org>
To: Dave Jiang <dave.jiang@intel.com>
Cc: dmaengine@vger.kernel.org
Subject: Re: [PATCH] dmaengine: fix channel index enumeration
Date: Mon, 27 Apr 2020 21:27:02 +0530	[thread overview]
Message-ID: <20200427155702.GE56386@vkoul-mobl.Dlink> (raw)
In-Reply-To: <158679961260.7674.8485924270472851852.stgit@djiang5-desk3.ch.intel.com>

On 13-04-20, 10:40, Dave Jiang wrote:
> When the channel register code was changed to allow hotplug operations,
> dynamic indexing wasn't taken into account. When channels are randomly
> plugged and unplugged out of order, the serial indexing breaks. Convert
> channel indexing to using IDA tracking in order to allow dynamic
> assignment. The previous code does not cause any regression bug for
> existing channel allocation besides idxd driver since the hotplug usage
> case is only used by idxd at this point.
> 
> With this change, the chan->idr_ref is also not needed any longer. We can
> have a device with no channels registered due to hot plug. The channel
> device release code no longer should attempt to free the dma device id on
> the last channel release.

Applied, thanks

-- 
~Vinod

      parent reply	other threads:[~2020-04-27 15:57 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-13 17:40 [PATCH] dmaengine: fix channel index enumeration Dave Jiang
2020-04-23 14:17 ` Dave Jiang
2020-04-27 15:57 ` Vinod Koul [this message]

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