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Add quirk patch to fix X-Gene 1 console on HP m400/Mustang (RHBZ 1531140)

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This commit is contained in:
Peter Robinson 2018-04-22 19:41:13 +01:00
parent 1d50bf7788
commit 181211fdc6
2 changed files with 50 additions and 0 deletions
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44
ACPI-scan-Fix-regression-related-to-X-Gene-UARTs.patch Normal file
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@ -0,0 +1,44 @@
From patchwork Fri Apr 20 03:29:47 2018
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Subject: ACPI / scan: Fix regression related to X-Gene UARTs
From: Mark Salter <msalter@redhat.com>
X-Patchwork-Id: 10351797
Message-Id: <20180420032947.23023-1-msalter@redhat.com>
To: =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20Danis?= <frederic.danis.oss@gmail.com>
Cc: "Rafael J . Wysocki" <rjw@rjwysocki.net>,
linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org
Date: Thu, 19 Apr 2018 23:29:47 -0400
Commit e361d1f85855 ("ACPI / scan: Fix enumeration for special UART
devices") caused a regression with some X-Gene based platforms (Mustang
and M400) with invalid DSDT. The DSDT makes it appear that the UART
device is also a slave device attached to itself. With the above commit
the UART won't be enumerated by ACPI scan (slave serial devices shouldn't
be). So check for X-Gene UART device and skip slace device check on it.
Signed-off-by: Mark Salter <msalter@redhat.com>
---
drivers/acpi/scan.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index cc234e6a6297..1dcdd0122862 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -1551,6 +1551,14 @@ static bool acpi_device_enumeration_by_parent(struct acpi_device *device)
fwnode_property_present(&device->fwnode, "baud")))
return true;
+ /*
+ * Firmware on some arm64 X-Gene platforms will make the UART
+ * device appear as both a UART and a slave of that UART. Just
+ * bail out here for X-Gene UARTs.
+ */
+ if (!strcmp(acpi_device_hid(device), "APMC0D08"))
+ return false;
+
INIT_LIST_HEAD(&resource_list);
acpi_dev_get_resources(device, &resource_list,
acpi_check_serial_bus_slave,

6
kernel.spec
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@ -580,6 +580,9 @@ Patch303: qcom-msm89xx-fixes.patch
# https://patchwork.kernel.org/patch/10173115/
Patch304: arm-dts-imx6qdl-udoo-Disable-usbh1-to-avoid-kernel-hang.patch
# https://patchwork.kernel.org/patch/10351797/
Patch305: ACPI-scan-Fix-regression-related-to-X-Gene-UARTs.patch
# https://marc.info/?l=linux-kernel&m=152328880417846&w=2
Patch308: arm64-thunderx-crypto-zip-fixes.patch
@ -1869,6 +1872,9 @@ fi
#
#
%changelog
* Sun Apr 22 2018 Peter Robinson <pbrobinson@fedoraproject.org>
- Add quirk patch to fix X-Gene 1 console on HP m400/Mustang (RHBZ 1531140)
* Fri Apr 20 2018 Justin M. Forbes <jforbes@fedoraproject.org> - 4.17.0-0.rc1.git3.1
- Linux v4.17-rc1-93-g43f70c960180