From: Joerg Roedel <joro@8bytes.org>
To: Raul E Rangel <rrangel@chromium.org>
Cc: Joerg Roedel <jroedel@suse.de>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
iommu@lists.linux-foundation.org, linux-acpi@vger.kernel.org,
evgreen@chromium.org, dianders@chromium.org,
Daniel Kurtz <djkurtz@chromium.org>,
Adrian Hunter <adrian.hunter@intel.com>,
Ulf Hansson <ulf.hansson@linaro.org>,
Andy Shevchenko <andy.shevchenko@gmail.com>,
Jerry Snitselaar <jsnitsel@redhat.com>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] iommu/amd: Fix get_acpihid_device_id()
Date: Wed, 13 May 2020 11:15:37 +0200 [thread overview]
Message-ID: <20200513091537.GJ9820@8bytes.org> (raw)
In-Reply-To: <20200511103229.v2.1.I6f1b6f973ee6c8af1348611370c73a0ec0ea53f1@changeid>
On Mon, May 11, 2020 at 10:33:36AM -0600, Raul E Rangel wrote:
> acpi_dev_hid_uid_match() expects a null pointer for UID if it doesn't
> exist. The acpihid_map_entry contains a char buffer for holding the
> UID. If no UID was provided in the IVRS table, this buffer will be
> zeroed. If we pass in a null string, acpi_dev_hid_uid_match() will
> return false because it will try and match an empty string to the ACPI
> UID of the device.
>
> Fixes: ae5e6c6439c3 ("iommu/amd: Switch to use acpi_dev_hid_uid_match()")
> Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> Signed-off-by: Raul E Rangel <rrangel@chromium.org>
> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
> ---
>
> Changes in v2:
> - Added Suggested by
> - Fixed commit description
> - Decided to keep `p->uid[0]` instead of `*p->uid` since the data member is an array instead of a pointer.
> - Used clang-format
>
> drivers/iommu/amd_iommu.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
Applied for v5.7, thanks Raul.
prev parent reply other threads:[~2020-05-13 9:15 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-11 16:33 [PATCH v2] iommu/amd: Fix get_acpihid_device_id() Raul E Rangel
2020-05-13 9:15 ` Joerg Roedel [this message]
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