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>
diff --git a/drivers/scsi/am53c974.c b/drivers/scsi/am53c974.c
index a6f5ee8..beea30e 100644
--- a/drivers/scsi/am53c974.c
+++ b/drivers/scsi/am53c974.c
@@ -476,6 +476,8 @@
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 @@
/* 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 @@
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 @@
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);