Add quirk patch to fix X-Gene 1 console on HP m400/Mustang (RHBZ 1531140)
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From patchwork Fri Apr 20 03:29:47 2018
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Content-Type: text/plain; charset="utf-8"
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MIME-Version: 1.0
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Content-Transfer-Encoding: 7bit
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Subject: ACPI / scan: Fix regression related to X-Gene UARTs
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From: Mark Salter <msalter@redhat.com>
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X-Patchwork-Id: 10351797
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Message-Id: <20180420032947.23023-1-msalter@redhat.com>
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To: =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20Danis?= <frederic.danis.oss@gmail.com>
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Cc: "Rafael J . Wysocki" <rjw@rjwysocki.net>,
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linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org
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Date: Thu, 19 Apr 2018 23:29:47 -0400
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Commit e361d1f85855 ("ACPI / scan: Fix enumeration for special UART
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devices") caused a regression with some X-Gene based platforms (Mustang
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and M400) with invalid DSDT. The DSDT makes it appear that the UART
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device is also a slave device attached to itself. With the above commit
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the UART won't be enumerated by ACPI scan (slave serial devices shouldn't
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be). So check for X-Gene UART device and skip slace device check on it.
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Signed-off-by: Mark Salter <msalter@redhat.com>
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---
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drivers/acpi/scan.c | 8 ++++++++
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1 file changed, 8 insertions(+)
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diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
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index cc234e6a6297..1dcdd0122862 100644
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--- a/drivers/acpi/scan.c
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+++ b/drivers/acpi/scan.c
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@@ -1551,6 +1551,14 @@ static bool acpi_device_enumeration_by_parent(struct acpi_device *device)
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fwnode_property_present(&device->fwnode, "baud")))
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return true;
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+ /*
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+ * Firmware on some arm64 X-Gene platforms will make the UART
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+ * device appear as both a UART and a slave of that UART. Just
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+ * bail out here for X-Gene UARTs.
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+ */
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+ if (!strcmp(acpi_device_hid(device), "APMC0D08"))
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+ return false;
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+
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INIT_LIST_HEAD(&resource_list);
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acpi_dev_get_resources(device, &resource_list,
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acpi_check_serial_bus_slave,
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kernel.spec
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kernel.spec
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@ -580,25 +580,26 @@ Patch302: ARM-tegra-usb-no-reset.patch
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# https://patchwork.kernel.org/patch/9820417/
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Patch303: qcom-msm89xx-fixes.patch
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# https://patchwork.kernel.org/patch/10351797/
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Patch304: ACPI-scan-Fix-regression-related-to-X-Gene-UARTs.patch
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# https://patchwork.kernel.org/patch/10173115/
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Patch304: arm-dts-imx6qdl-udoo-Disable-usbh1-to-avoid-kernel-hang.patch
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Patch305: arm-dts-imx6qdl-udoo-Disable-usbh1-to-avoid-kernel-hang.patch
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# http://patches.linaro.org/patch/131764/
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Patch305: wcn36xx-Fix-firmware-crash-due-to-corrupted-buffer-address.patch
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Patch306: wcn36xx-Fix-firmware-crash-due-to-corrupted-buffer-address.patch
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# https://patchwork.kernel.org/patch/10245303/
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Patch306: wcn36xx-reduce-verbosity-of-drivers-messages.patch
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Patch307: wcn36xx-reduce-verbosity-of-drivers-messages.patch
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# https://www.spinics.net/lists/arm-kernel/msg632925.html
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Patch307: arm-crypto-sunxi-ss-Add-MODULE_ALIAS-to-sun4i-ss.patch
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Patch308: arm-crypto-sunxi-ss-Add-MODULE_ALIAS-to-sun4i-ss.patch
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# https://marc.info/?l=linux-kernel&m=152328880417846&w=2
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Patch308: arm64-thunderx-crypto-zip-fixes.patch
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Patch309: arm64-thunderx-crypto-zip-fixes.patch
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# https://www.spinics.net/lists/linux-crypto/msg32725.html
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Patch309: crypto-testmgr-Allow-different-compression-results.patch
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Patch310: arm-tegra-fix-nouveau-crash.patch
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Patch310: crypto-testmgr-Allow-different-compression-results.patch
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# https://www.spinics.net/lists/arm-kernel/msg630629.html
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Patch311: arm-sunxi-nvmem-fixH3.patch
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@ -608,6 +609,8 @@ Patch312: clk-ti-fix-flag-space-conflict-with-clkctrl-clocks.patch
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Patch313: arm-dts-Add-am335x-pocketbeagle.patch
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Patch314: arm-tegra-fix-nouveau-crash.patch
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# Upstream 4.17 back port
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Patch319: of-i2c-fix-module-aliases.patch
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@ -1900,6 +1903,9 @@ fi
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#
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#
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%changelog
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* Sun Apr 22 2018 Peter Robinson <pbrobinson@fedoraproject.org>
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- Add quirk patch to fix X-Gene 1 console on HP m400/Mustang (RHBZ 1531140)
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* Thu Apr 19 2018 Jeremy Cline <jeremy@jcline.org> - 4.16.3-300
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- Linux v4.16.3
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