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From: Tobias Klausmann <tobias.johannes.klausmann@mni.thm.de>
To: kvalo@codeaurora.org, davem@davemloft.net,
	ath10k@lists.infradead.org, linux-wireless@vger.kernel.org,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	nicoleotsuka@gmail.com, hch@lst.de, m.szyprowski@samsung.com,
	robin.murphy@arm.com, iommu@lists.linux-foundation.org
Cc: tobias.klausmann@freenet.de
Subject: regression in ath10k dma allocation
Date: Fri, 16 Aug 2019 18:08:26 +0200
Message-ID: <8fe8b415-2d34-0a14-170b-dcb31c162e67@mni.thm.de> (raw)

Hello all,

within the current development cycle i noted the ath10k driver failing 
to setup:

[    3.185660] ath10k_pci 0000:02:00.0: failed to alloc CE dest ring 1: -12
[    3.185664] ath10k_pci 0000:02:00.0: failed to allocate copy engine 
pipe 1: -12
[    3.185667] ath10k_pci 0000:02:00.0: failed to allocate copy engine 
pipes: -12
[    3.185669] ath10k_pci 0000:02:00.0: failed to setup resource: -12
[    3.185692] ath10k_pci: probe of 0000:02:00.0 failed with error -12

the actual failure comes from [1] and indeed bisecting brought me to a 
related commit "dma-contiguous: add dma_{alloc,free}_contiguous() 
helpers" [2]. Reverting the commit fixes the problem, yet this might 
just be the driver abusing the dma infrastructure, so hopefully someone 
can have a look at it, as i'm not familiar with the code!


[1]: 
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/net/wireless/ath/ath10k/ce.c?h=v5.3-rc4#n1650

[2]: 
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b1d2dc009dece4cd7e629419b52266ba51960a6b


Greetings,

Tobias

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Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-16 16:08 Tobias Klausmann [this message]
2019-08-16 16:43 ` Christoph Hellwig
2019-08-16 20:16   ` Tobias Klausmann
2019-08-16 22:25     ` Nicolin Chen
2019-08-16 22:42       ` Tobias Klausmann
2019-08-18  3:13       ` Hillf Danton
2019-08-18 22:38         ` Tobias Klausmann
2019-08-20  1:58           ` Nicolin Chen
2019-08-20  2:14             ` Christoph Hellwig
2019-08-20  3:05           ` Christoph Hellwig
2019-08-20  6:58           ` Hillf Danton
2019-08-20  7:12             ` Christoph Hellwig
2019-08-20 20:24               ` Tobias Klausmann
2019-08-20  2:29 Hillf Danton

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