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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 <anbro@ok.de>
Tested-by: Andreas Brogle <anbro@ok.de>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
This commit is contained in:
Hannes Reinecke 2015-03-27 14:31:12 +01:00 committed by James Bottomley
parent 16b8528d20
commit 8041708ed4
1 changed files with 4 additions and 2 deletions
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6
drivers/scsi/am53c974.c
View File

@ -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);