[PATCH v3 05/20] platform/x86/intel/tpmi: Keep the feature resources in intel_tpmi_info

[Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>]

The PFS walk and tpmi_create_devices() go back to the intel_vsec_device
for the MMIO resource array and its count, although the count is already
cached in intel_tpmi_info.

Cache the resource array as well and use it everywhere. The array
belongs to the enumerating device and outlives the TPMI instance, so
holding a pointer to it is safe. Fewer places need an intel_vsec_device,
which enumeration methods other than PCI VSEC do not have.

No functional change.

Co-developed-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
---
 drivers/platform/x86/intel/vsec_tpmi.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/platform/x86/intel/vsec_tpmi.c b/drivers/platform/x86/intel/vsec_tpmi.c
index d254dc6a4d0d..b462fd0319e5 100644
--- a/drivers/platform/x86/intel/vsec_tpmi.c
+++ b/drivers/platform/x86/intel/vsec_tpmi.c
@@ -110,6 +110,7 @@ struct intel_tpmi_pm_feature {
  * @plat_info:		Stores platform info which can be used by the client drivers
  * @tpmi_control_mem:	Memory mapped IO for getting control information
  * @dbgfs_dir:		debugfs entry pointer
+ * @resource:		Array of feature_count MMIO resources, one per PFS entry
  *
  * Stores the information for all TPMI devices enumerated from a single PCI device.
  */
@@ -121,6 +122,7 @@ struct intel_tpmi_info {
 	struct oobmsm_plat_info plat_info;
 	void __iomem *tpmi_control_mem;
 	struct dentry *dbgfs_dir;
+	struct resource *resource;
 };
 
 /**
@@ -656,10 +658,9 @@ static int tpmi_create_device(struct intel_tpmi_info *tpmi_info,
 
 static int tpmi_create_devices(struct intel_tpmi_info *tpmi_info)
 {
-	struct intel_vsec_device *vsec_dev = tpmi_info->vsec_dev;
 	int ret, i;
 
-	for (i = 0; i < vsec_dev->num_resources; i++) {
+	for (i = 0; i < tpmi_info->feature_count; i++) {
 		ret = tpmi_create_device(tpmi_info, &tpmi_info->tpmi_features[i],
 					 tpmi_info->pfs_start);
 		/*
@@ -748,15 +749,16 @@ static int intel_vsec_tpmi_init(struct auxiliary_device *auxdev)
 
 	tpmi_info->vsec_dev = vsec_dev;
 	tpmi_info->feature_count = vsec_dev->num_resources;
+	tpmi_info->resource = vsec_dev->resource;
 	tpmi_info->plat_info.bus_number = pci_dev->bus->number;
 
-	tpmi_info->tpmi_features = devm_kcalloc(&auxdev->dev, vsec_dev->num_resources,
+	tpmi_info->tpmi_features = devm_kcalloc(&auxdev->dev, tpmi_info->feature_count,
 						sizeof(*tpmi_info->tpmi_features),
 						GFP_KERNEL);
 	if (!tpmi_info->tpmi_features)
 		return -ENOMEM;
 
-	for (i = 0; i < vsec_dev->num_resources; i++) {
+	for (i = 0; i < tpmi_info->feature_count; i++) {
 		struct intel_tpmi_pm_feature *pfs;
 		struct resource *res;
 		u64 res_start;
@@ -764,7 +766,7 @@ static int intel_vsec_tpmi_init(struct auxiliary_device *auxdev)
 
 		pfs = &tpmi_info->tpmi_features[i];
 
-		res = &vsec_dev->resource[i];
+		res = &tpmi_info->resource[i];
 		if (!res)
 			continue;
 
-- 
2.43.0