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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org,
        "David E. Box" <david.e.box@linux.intel.com>,
        Hans de Goede <hdegoede@redhat.com>,
        Rajneesh Bhardwaj <irenic.rajneesh@gmail.com>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.4 069/184] platform/x86: intel_pmc_core: Dont use global pmcdev in quirks
Date:   Mon, 10 May 2021 12:19:23 +0200
Message-Id: <20210510101952.460474396@linuxfoundation.org>
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References: <20210510101950.200777181@linuxfoundation.org>
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From: David E. Box <david.e.box@linux.intel.com>

[ Upstream commit c9f86d6ca6b5e23d30d16ade4b9fff5b922a610a ]

The DMI callbacks, used for quirks, currently access the PMC by getting
the address a global pmc_dev struct. Instead, have the callbacks set a
global quirk specific variable. In probe, after calling dmi_check_system(),
pass pmc_dev to a function that will handle each quirk if its variable
condition is met. This allows removing the global pmc_dev later.

Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Rajneesh Bhardwaj <irenic.rajneesh@gmail.com>
Link: https://lore.kernel.org/r/20210417031252.3020837-2-david.e.box@linux.intel.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/platform/x86/intel_pmc_core.c | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/drivers/platform/x86/intel_pmc_core.c b/drivers/platform/x86/intel_pmc_core.c
index 571b4754477c..4c1312f1616c 100644
--- a/drivers/platform/x86/intel_pmc_core.c
+++ b/drivers/platform/x86/intel_pmc_core.c
@@ -831,9 +831,15 @@ static const struct pci_device_id pmc_pci_ids[] = {
  * the platform BIOS enforces 24Mhx Crystal to shutdown
  * before PMC can assert SLP_S0#.
  */
+static bool xtal_ignore;
 static int quirk_xtal_ignore(const struct dmi_system_id *id)
 {
-	struct pmc_dev *pmcdev = &pmc;
+	xtal_ignore = true;
+	return 0;
+}
+
+static void pmc_core_xtal_ignore(struct pmc_dev *pmcdev)
+{
 	u32 value;
 
 	value = pmc_core_reg_read(pmcdev, pmcdev->map->pm_vric1_offset);
@@ -842,7 +848,6 @@ static int quirk_xtal_ignore(const struct dmi_system_id *id)
 	/* Low Voltage Mode Enable */
 	value &= ~SPT_PMC_VRIC1_SLPS0LVEN;
 	pmc_core_reg_write(pmcdev, pmcdev->map->pm_vric1_offset, value);
-	return 0;
 }
 
 static const struct dmi_system_id pmc_core_dmi_table[]  = {
@@ -857,6 +862,14 @@ static const struct dmi_system_id pmc_core_dmi_table[]  = {
 	{}
 };
 
+static void pmc_core_do_dmi_quirks(struct pmc_dev *pmcdev)
+{
+	dmi_check_system(pmc_core_dmi_table);
+
+	if (xtal_ignore)
+		pmc_core_xtal_ignore(pmcdev);
+}
+
 static int pmc_core_probe(struct platform_device *pdev)
 {
 	static bool device_initialized;
@@ -898,7 +911,7 @@ static int pmc_core_probe(struct platform_device *pdev)
 	mutex_init(&pmcdev->lock);
 	platform_set_drvdata(pdev, pmcdev);
 	pmcdev->pmc_xram_read_bit = pmc_core_check_read_lock_bit();
-	dmi_check_system(pmc_core_dmi_table);
+	pmc_core_do_dmi_quirks(pmcdev);
 
 	pmc_core_dbgfs_register(pmcdev);
 
-- 
2.30.2