From: Hannes Reinecke Date: Fri, 27 Mar 2015 13:31:12 +0000 (+0100) Subject: am53c974: Fix crash during modprobe X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=8041708ed4d993c5466c20926210598afa97194e;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git am53c974: Fix crash during modprobe On systems with shared interrupts the interrupt routine might be called as soon as the interrupt is enabled. As this might happen before pci_set_drvdata() is called the system would crash. Reported-by: Andreas Brogle Tested-by: Andreas Brogle Signed-off-by: Hannes Reinecke Signed-off-by: James Bottomley --- diff --git a/drivers/scsi/am53c974.c b/drivers/scsi/am53c974.c index a6f5ee80fadc..beea30e5a34a 100644 --- a/drivers/scsi/am53c974.c +++ b/drivers/scsi/am53c974.c @@ -476,6 +476,8 @@ static int pci_esp_probe_one(struct pci_dev *pdev, goto fail_unmap_regs; } + pci_set_drvdata(pdev, pep); + err = request_irq(pdev->irq, scsi_esp_intr, IRQF_SHARED, DRV_MODULE_NAME, esp); if (err < 0) { @@ -496,8 +498,6 @@ static int pci_esp_probe_one(struct pci_dev *pdev, /* Assume 40MHz clock */ esp->cfreq = 40000000; - pci_set_drvdata(pdev, pep); - err = scsi_esp_register(esp, &pdev->dev); if (err) goto fail_free_irq; @@ -507,6 +507,7 @@ static int pci_esp_probe_one(struct pci_dev *pdev, fail_free_irq: free_irq(pdev->irq, esp); fail_unmap_command_block: + pci_set_drvdata(pdev, NULL); pci_free_consistent(pdev, 16, esp->command_block, esp->command_block_dma); fail_unmap_regs: @@ -530,6 +531,7 @@ static void pci_esp_remove_one(struct pci_dev *pdev) scsi_esp_unregister(esp); free_irq(pdev->irq, esp); + pci_set_drvdata(pdev, NULL); pci_free_consistent(pdev, 16, esp->command_block, esp->command_block_dma); pci_iounmap(pdev, esp->regs);