linux-kernel - Re: [PATCH 0/2] Handle probe defer properly in MTD core

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Date:   Wed, 3 Mar 2021 09:03:42 +0100
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc:     richard@....at, vigneshr@...com, linux-arm-msm@...r.kernel.org,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
        boris.brezillon@...labora.com, Daniele.Palmas@...it.com,
        bjorn.andersson@...aro.org
Subject: Re: [PATCH 0/2] Handle probe defer properly in MTD core

Hi Manivannan,

Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org> wrote on Tue,
2 Mar 2021 18:57:55 +0530:

> Hello,
> 
> These two patches aims at fixing the -EPROBE_DEFER handling in the MTD
> core and also in the Qcom nand driver. The "qcomsmem" parser depends on
> the QCOM_SMEM driver to parse the partitions defined in the shared
> memory. Due to the DT layout, the SMEM driver might probe after the NAND
> driver. In that case, the -EPROBE_DEFER returned by qcom_smem_get() in
> the parser will fail to propagate till the driver core. So this will
> result in the partitions not getting parsed even after the SMEM driver is
> available.
> 
> So fix this issue by handling the -EPROBE_DEFER error properly in both
> MTD core and in the Qcom nand driver. This issue is observed on Qcom SDX55
> based Telit FN980 EVB and in SDX55-MTP.

Applied manually on top of nand/next as infradead.org is dead at the
moment and the patches were not collected by patchwork.

Thanks,
Miquèl