habanalabs: fix PCIe access to SRAM via debugfs

hl_access_sram_dram_region() uses a region base which is set within the
hl_set_dram_bar() function. However, for SRAM access this function is
not called, and we end up with a wrong value of region base and with a
bad calculated address.
Fix it by initializing the region base value independently of whether
hl_set_dram_bar() is called or not.
Signed-off-by: Tomer Tayar <ttayar@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>

drivers/misc/habanalabs/common/device.c

@@ -69,17 +69,17 @@ int hl_access_sram_dram_region(struct hl_device *hdev, u64 addr, u64 *val,
 	enum debugfs_access_type acc_type, enum pci_region region_type, bool set_dram_bar)
 {
 	struct pci_mem_region *region = &hdev->pci_mem_region[region_type];
-	u64 old_base = 0, rc, new_bar_region_base = 0;
+	u64 old_base = 0, rc, bar_region_base = region->region_base;
 	void __iomem *acc_addr;
 
 	if (set_dram_bar) {
-		old_base = hl_set_dram_bar(hdev, addr, region, &new_bar_region_base);
+		old_base = hl_set_dram_bar(hdev, addr, region, &bar_region_base);
 		if (old_base == U64_MAX)
 			return -EIO;
 	}
 
 	acc_addr = hdev->pcie_bar[region->bar_id] + region->offset_in_bar +
-			(addr - new_bar_region_base);
+			(addr - bar_region_base);
 
 	switch (acc_type) {
 	case DEBUGFS_READ8: