From: Qi Liu <liuqi115@huawei.com>
Date: Thu, 24 Feb 2022 19:51:26 +0800
Subject: scsi: hisi_sas: Free irq vectors in order for v3 HW
Git-commit: 554fb72ee34f4732c7f694f56c3c6e67790352a0
Patch-mainline: v5.18-rc1
References: git-fixes
If the driver probe fails to request the channel IRQ or fatal IRQ, the
driver will free the IRQ vectors before freeing the IRQs in free_irq(),
and this will cause a kernel BUG like this:
------------[ cut here ]------------
kernel BUG at drivers/pci/msi.c:369!
Internal error: Oops - BUG: 0 [#1] PREEMPT SMP
Call trace:
free_msi_irqs+0x118/0x13c
pci_disable_msi+0xfc/0x120
pci_free_irq_vectors+0x24/0x3c
hisi_sas_v3_probe+0x360/0x9d0 [hisi_sas_v3_hw]
local_pci_probe+0x44/0xb0
work_for_cpu_fn+0x20/0x34
process_one_work+0x1d0/0x340
worker_thread+0x2e0/0x460
kthread+0x180/0x190
ret_from_fork+0x10/0x20
---[ end trace b88990335b610c11 ]---
So we use devm_add_action() to control the order in which we free the
vectors.
[lduncan: refreshed to apply.]
Link: https://lore.kernel.org/r/1645703489-87194-4-git-send-email-john.garry@huawei.com
Signed-off-by: Qi Liu <liuqi115@huawei.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Lee Duncan <lduncan@suse.com>
---
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c | 16 +++++++++++-----
1 file changed, 11 insertions(+), 5 deletions(-)
--- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
@@ -2393,17 +2393,25 @@ static irqreturn_t cq_interrupt_v3_hw(in
return IRQ_WAKE_THREAD;
}
+static void hisi_sas_v3_free_vectors(void *data)
+{
+ struct pci_dev *pdev = data;
+
+ pci_free_irq_vectors(pdev);
+}
+
static int interrupt_preinit_v3_hw(struct hisi_hba *hisi_hba)
{
int vectors;
int max_msi = HISI_SAS_MSI_COUNT_V3_HW, min_msi;
struct Scsi_Host *shost = hisi_hba->shost;
+ struct pci_dev *pdev = hisi_hba->pci_dev;
struct irq_affinity desc = {
.pre_vectors = BASE_VECTORS_V3_HW,
};
min_msi = MIN_AFFINE_VECTORS_V3_HW;
- vectors = pci_alloc_irq_vectors_affinity(hisi_hba->pci_dev,
+ vectors = pci_alloc_irq_vectors_affinity(pdev,
min_msi, max_msi,
PCI_IRQ_MSI |
PCI_IRQ_AFFINITY,
@@ -2415,6 +2423,7 @@ static int interrupt_preinit_v3_hw(struc
hisi_hba->cq_nvecs = vectors - BASE_VECTORS_V3_HW;
shost->nr_hw_queues = hisi_hba->cq_nvecs;
+ devm_add_action(&pdev->dev, hisi_sas_v3_free_vectors, pdev);
return 0;
}
@@ -4764,7 +4773,7 @@ hisi_sas_v3_probe(struct pci_dev *pdev,
dev_err(dev, "%d hw queues\n", shost->nr_hw_queues);
rc = scsi_add_host(shost, dev);
if (rc)
- goto err_out_free_irq_vectors;
+ goto err_out_debugfs;
rc = sas_register_ha(sha);
if (rc)
@@ -4795,8 +4804,6 @@ err_out_hw_init:
sas_unregister_ha(sha);
err_out_register_ha:
scsi_remove_host(shost);
-err_out_free_irq_vectors:
- pci_free_irq_vectors(pdev);
err_out_debugfs:
debugfs_exit_v3_hw(hisi_hba);
err_out_ha:
@@ -4820,7 +4827,6 @@ hisi_sas_v3_destroy_irqs(struct pci_dev
devm_free_irq(&pdev->dev, pci_irq_vector(pdev, nr), cq);
}
- pci_free_irq_vectors(pdev);
}
static void hisi_sas_v3_remove(struct pci_dev *pdev)