Linus,
Here's a patch that fixes a bug that can cause PCI driver list
corruption. If parport_pc's init_module fails after it calls
pci_register_driver, cleanup_module isn't called and so it's still
registered when it gets unloaded.
Tim.
*/
2001-01-13 Tim Waugh <[EMAIL PROTECTED]>
* parport_pc.c: Fix PCI driver list corruption on
unsuccessful module load (Andrew Morton).
--- linux/drivers/parport/parport_pc.c.init Tue Feb 13 23:31:25 2001
+++ linux/drivers/parport/parport_pc.c Tue Feb 13 23:35:56 2001
@@ -89,6 +89,7 @@
} superios[NR_SUPERIOS] __devinitdata = { {0,},};
static int user_specified __devinitdata = 0;
+static int registered_parport;
/* frob_control, but for ECR */
static void frob_econtrol (struct parport *pb, unsigned char m,
@@ -2605,6 +2606,7 @@
count += parport_pc_find_nonpci_ports (autoirq, autodma);
r = pci_register_driver (&parport_pc_pci_driver);
+ registered_parport = 1;
if (r > 0)
count += r;
@@ -2667,6 +2669,7 @@
/* Work out how many ports we have, then get parport_share to parse
the irq values. */
unsigned int i;
+ int ret;
for (i = 0; i < PARPORT_PC_MAX_PORTS && io[i]; i++);
if (i) {
if (parport_parse_irqs(i, irq, irqval)) return 1;
@@ -2691,7 +2694,11 @@
}
}
- return !parport_pc_init (io, io_hi, irqval, dmaval);
+ ret = !parport_pc_init (io, io_hi, irqval, dmaval);
+ if (ret && registered_parport)
+ pci_unregister_driver (&parport_pc_pci_driver);
+
+ return ret;
}
void cleanup_module(void)
*** linux/drivers/parport/ChangeLog.init Fri Jan 5 10:41:52 2001
--- linux/drivers/parport/ChangeLog Tue Feb 13 23:32:02 2001
***************
*** 0 ****
--- 1,7 ----
+ 2001-02-13 Andrew Morton <[EMAIL PROTECTED]>
+
+ * parport_pc.c (registered_parport): New static variable.
+ (parport_pc_find_ports): Set it when we register PCI driver.
+ (init_module): Unregister PCI driver if necessary when we
+ fail.
+
-
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