From: Nathan Lynch <nathanl@linux.ibm.com>
To: Tyrel Datwyler <tyreld@linux.ibm.com>
Cc: bhelgaas@google.com, linux-pci@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [RFC PATCH 2/9] powerpc/pseries: fix bad drc_index_start value parsing of drc-info entry
Date: Thu, 10 Oct 2019 14:04:59 -0500 [thread overview]
Message-ID: <87y2xsifqc.fsf@linux.ibm.com> (raw)
In-Reply-To: <1569910334-5972-3-git-send-email-tyreld@linux.ibm.com>
Tyrel Datwyler <tyreld@linux.ibm.com> writes:
> The ibm,drc-info property is an array property that contains drc-info
> entries such that each entry is made up of 2 string encoded elements
> followed by 5 int encoded elements. The of_read_drc_info_cell()
> helper contains comments that correctly name the expected elements
> and their encoding. However, the usage of of_prop_next_string() and
> of_prop_next_u32() introduced a subtle skippage of the first u32.
> This is a result of of_prop_next_string() returns a pointer to the
> next property value which is not a string, but actually a (__be32 *).
> As, a result the following call to of_prop_next_u32() passes over the
> current int encoded value and actually stores the next one wrongly.
>
> Simply endian swap the current value in place after reading the first
> two string values. The remaining int encoded values can then be read
> correctly using of_prop_next_u32().
Good but I think it would make more sense for a fix for
of_read_drc_info_cell() to precede any patch in the series which
introduces new callers, such as patch #1.
next prev parent reply other threads:[~2019-10-10 19:07 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-01 6:12 [RFC PATCH 0/9] Fixes and Enablement of ibm,drc-info property Tyrel Datwyler
2019-10-01 6:12 ` [RFC PATCH 1/9] powerpc/pseries: add cpu DLPAR support for drc-info property Tyrel Datwyler
2019-10-10 18:56 ` Nathan Lynch
2019-10-30 23:35 ` Tyrel Datwyler
2019-10-31 17:14 ` Nathan Lynch
2019-10-01 6:12 ` [RFC PATCH 2/9] powerpc/pseries: fix bad drc_index_start value parsing of drc-info entry Tyrel Datwyler
2019-10-10 19:04 ` Nathan Lynch [this message]
2019-10-10 20:16 ` powerpc/405GP, cuImage and PCI support Carlo Pisani
2019-10-31 0:15 ` [RFC PATCH 2/9] powerpc/pseries: fix bad drc_index_start value parsing of drc-info entry Tyrel Datwyler
2019-10-01 6:12 ` [RFC PATCH 3/9] powerpc/pseries: fix drc-info mappings of logical cpus to drc-index Tyrel Datwyler
2019-10-01 6:12 ` [RFC PATCH 4/9] PCI: rpaphp: fix up pointer to first drc-info entry Tyrel Datwyler
2019-10-01 6:12 ` [RFC PATCH 5/9] PCI: rpaphp: don't rely on firmware feature to imply drc-info support Tyrel Datwyler
2019-10-01 6:12 ` [RFC PATCH 6/9] PCI: rpaphp: add drc-info support for hotplug slot registration Tyrel Datwyler
2019-10-01 6:12 ` [RFC PATCH 7/9] PCI: rpaphp: annotate and correctly byte swap DRC properties Tyrel Datwyler
2019-10-01 6:12 ` [RFC PATCH 8/9] PCI: rpaphp: correctly match ibm, my-drc-index to drc-name when using drc-info Tyrel Datwyler
2019-10-01 6:12 ` [RFC PATCH 9/9] powerpc: Enable support for ibm,drc-info property Tyrel Datwyler
2019-10-01 20:02 ` [RFC PATCH 0/9] Fixes and Enablement of " Bjorn Helgaas
2019-10-31 0:15 ` Tyrel Datwyler
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