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Subject[PATCH 4.10 091/110] ACPI: save NVS memory for Lenovo G50-45
Date
4.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Zhang Rui <rui.zhang@intel.com>

[ Upstream commit cbc00c1310d34139a63946482b40a6b261a03fb9 ]

In commit 821d6f0359b0 (ACPI / sleep: Do not save NVS for new machines to
accelerate S3), to optimize S3 suspend/resume speed, code is introduced
to ignore NVS memory saving during S3 for all the platforms later than
2012.

But, Lenovo G50-45, a platform released in 2015, still needs NVS memory
saving during S3. A quirk is introduced for this platform.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=189431
Tested-by: Przemek <soprwa@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
[ rjw: Drop unnecessary code ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/acpi/sleep.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)

--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -130,6 +130,12 @@ void __init acpi_nvs_nosave_s3(void)
nvs_nosave_s3 = true;
}

+static int __init init_nvs_save_s3(const struct dmi_system_id *d)
+{
+ nvs_nosave_s3 = false;
+ return 0;
+}
+
/*
* ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the
* user to request that behavior by using the 'acpi_old_suspend_ordering'
@@ -324,6 +330,19 @@ static struct dmi_system_id acpisleep_dm
DMI_MATCH(DMI_PRODUCT_NAME, "K54HR"),
},
},
+ /*
+ * https://bugzilla.kernel.org/show_bug.cgi?id=189431
+ * Lenovo G50-45 is a platform later than 2012, but needs nvs memory
+ * saving during S3.
+ */
+ {
+ .callback = init_nvs_save_s3,
+ .ident = "Lenovo G50-45",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "80E3"),
+ },
+ },
{},
};


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