[PATCH v2] nvme-pci: fix error handling in nvme_pci_enable()

From: Tong Zhang
Date: Thu Dec 29 2022 - 13:38:19 EST


There are two issues in nvme_pci_enable()
1) If pci_alloc_irq_vectors() fails, device is left enabled. Fix this by
adding a goto disable statement.
2) nvme_pci_configure_admin_queue could return -ENODEV, in this case,
we will need to free IRQ properly. Otherwise following warning could be
triggered

[ 5.286752] WARNING: CPU: 0 PID: 33 at kernel/irq/irqdomain.c:253 irq_domain_remove+0x12d/0x140
[ 5.290547] Call Trace:
[ 5.290626] <TASK>
[ 5.290695] msi_remove_device_irq_domain+0xc9/0xf0
[ 5.290843] msi_device_data_release+0x15/0x80
[ 5.290978] release_nodes+0x58/0x90
[ 5.293788] WARNING: CPU: 0 PID: 33 at kernel/irq/msi.c:276 msi_device_data_release+0x76/0x80
[ 5.297573] Call Trace:
[ 5.297651] <TASK>
[ 5.297719] release_nodes+0x58/0x90
[ 5.297831] devres_release_all+0xef/0x140
[ 5.298339] device_unbind_cleanup+0x11/0xc0
[ 5.298479] really_probe+0x296/0x320

Fixes: a6ee7f19ebfd ("nvme-pci: call nvme_pci_configure_admin_queue from nvme_pci_enable")
Co-developed-by: Keith Busch <kbusch@xxxxxxxxxx>
Signed-off-by: Tong Zhang <ztong0001@xxxxxxxxx>
---
v2: handle pci_alloc_irq_vectors() error

drivers/nvme/host/pci.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index f0f8027644bb..3255e7a6f643 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -2530,7 +2530,7 @@ static int nvme_pci_enable(struct nvme_dev *dev)
*/
result = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_ALL_TYPES);
if (result < 0)
- return result;
+ goto disable;

dev->ctrl.cap = lo_hi_readq(dev->bar + NVME_REG_CAP);

@@ -2584,8 +2584,13 @@ static int nvme_pci_enable(struct nvme_dev *dev)
pci_enable_pcie_error_reporting(pdev);
pci_save_state(pdev);

- return nvme_pci_configure_admin_queue(dev);
+ result = nvme_pci_configure_admin_queue(dev);
+ if (result)
+ goto free_irq;
+ return result;

+ free_irq:
+ pci_free_irq_vectors(pdev);
disable:
pci_disable_device(pdev);
return result;
--
2.25.1