From 16d3f224ec66623ab69c704dd57313d05bc44d93 Mon Sep 17 00:00:00 2001
From: emersonbusson <93008583+emersonbusson@users.noreply.github.com>
Date: Fri, 18 Sep 2026 02:37:35 +0000
Subject: [PATCH 1/4] refactor(ramshared): linearize pci_remove teardown
 sequence

Rollback trigger: Kernel panics on device remove or memory leak reports from KASAN.
---
 drivers/block/ramshared/main.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/block/ramshared/main.c b/drivers/block/ramshared/main.c
index 6c0c5fa0c..ecff271c3 100644
--- a/drivers/block/ramshared/main.c
+++ b/drivers/block/ramshared/main.c
@@ -148,14 +148,19 @@ static void ramshared_pci_remove(struct pci_dev *pdev)
 		return;
 
 	rs_dev = pci_get_drvdata(pdev);
-	if (!rs_dev)
+	if (!rs_dev) {
+		dev_err(&pdev->dev, "driver private data missing during remove\n");
 		return;
+	}
+
+	pci_set_drvdata(pdev, NULL);
 
 	ramshared_queue_cleanup(rs_dev);
 	ramshared_dma_cleanup(rs_dev);
-	pci_release_mem_regions(pdev);
 	pci_clear_master(pdev);
+	pci_release_mem_regions(pdev);
 	pci_disable_device(pdev);
+	mutex_destroy(&rs_dev->lock);
 
 	dev_info(&pdev->dev, "RamShared device removed successfully\n");
 }

From 3402e9b9c4db2f9fa62c5d020aac1bac9d94f77c Mon Sep 17 00:00:00 2001
From: emersonbusson <93008583+emersonbusson@users.noreply.github.com>
Date: Fri, 18 Sep 2026 02:44:30 +0000
Subject: [PATCH 2/4] refactor(ramshared): linearize pci_remove teardown
 sequence

Rollback trigger: Kernel panics on device remove or memory leak reports from KASAN.

From 50172e384c4357356f949fe033a656cda83411a5 Mon Sep 17 00:00:00 2001
From: emersonbusson <93008583+emersonbusson@users.noreply.github.com>
Date: Fri, 18 Sep 2026 02:51:36 +0000
Subject: [PATCH 3/4] refactor(ramshared): linearize pci_remove teardown
 sequence

Rollback trigger: Kernel panics on device remove or memory leak reports from KASAN.

From 02bfa3b9f96c2a6481a6ab966a2d40e6de9d1d08 Mon Sep 17 00:00:00 2001
From: emersonbusson <93008583+emersonbusson@users.noreply.github.com>
Date: Fri, 18 Sep 2026 02:57:25 +0000
Subject: [PATCH 4/4] refactor(ramshared): linearize pci_remove teardown
 sequence

Rollback trigger: Kernel panics on device remove or memory leak reports from KASAN.