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cciss: Fix pci_driver.shutdown while device is still active 

Fix an Oops in the cciss driver caused by system shutdown while a filesystem
on a cciss device is still active.  The cciss_remove_one function only
properly removes the device if the device has been cleanly released by its
users, which is not the case when the pci_driver.shutdown method is called.

This patch adds a new cciss_shutdown function to better match the pattern
used by various SCSI drivers: deactivate device interrupts and flush caches.
It also alters the cciss_remove_one function to match and readds the
__devexit annotation that was removed when cciss_remove_one was serving as
the pci_driver.shutdown method.

Signed-off-by: Gerald Britton <gbritton@alum.mit.edu>
Acked-by: Mike Miller <mike.miller@hp.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Gerald Britton 2007-05-14 13:53:01 -04:00 committed by Linus Torvalds
parent dec04cff50
commit e9ca75b535
1 changed files with 31 additions and 16 deletions
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47
drivers/block/cciss.c
View File

@ -3469,12 +3469,38 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
return -1;
}
static void cciss_remove_one(struct pci_dev *pdev)
static void cciss_shutdown(struct pci_dev *pdev)
{
ctlr_info_t *tmp_ptr;
int i;
char flush_buf[4];
int return_code;
tmp_ptr = pci_get_drvdata(pdev);
if (tmp_ptr == NULL)
return;
i = tmp_ptr->ctlr;
if (hba[i] == NULL)
return;
/* Turn board interrupts off and send the flush cache command */
/* sendcmd will turn off interrupt, and send the flush...
* To write all data in the battery backed cache to disks */
memset(flush_buf, 0, 4);
return_code = sendcmd(CCISS_CACHE_FLUSH, i, flush_buf, 4, 0, 0, 0, NULL,
TYPE_CMD);
if (return_code == IO_OK) {
printk(KERN_INFO "Completed flushing cache on controller %d\n", i);
} else {
printk(KERN_WARNING "Error flushing cache on controller %d\n", i);
}
free_irq(hba[i]->intr[2], hba[i]);
}
static void __devexit cciss_remove_one(struct pci_dev *pdev)
{
ctlr_info_t *tmp_ptr;
int i, j;
char flush_buf[4];
int return_code;
if (pci_get_drvdata(pdev) == NULL) {
printk(KERN_ERR "cciss: Unable to remove device \n");
@ -3506,18 +3532,7 @@ static void cciss_remove_one(struct pci_dev *pdev)
cciss_unregister_scsi(i); /* unhook from SCSI subsystem */
/* Turn board interrupts off and send the flush cache command */
/* sendcmd will turn off interrupt, and send the flush...
* To write all data in the battery backed cache to disks */
memset(flush_buf, 0, 4);
return_code = sendcmd(CCISS_CACHE_FLUSH, i, flush_buf, 4, 0, 0, 0, NULL,
TYPE_CMD);
if (return_code == IO_OK) {
printk(KERN_INFO "Completed flushing cache on controller %d\n", i);
} else {
printk(KERN_WARNING "Error flushing cache on controller %d\n", i);
}
free_irq(hba[i]->intr[2], hba[i]);
cciss_shutdown(pdev);
#ifdef CONFIG_PCI_MSI
if (hba[i]->msix_vector)
@ -3550,7 +3565,7 @@ static struct pci_driver cciss_pci_driver = {
.probe = cciss_init_one,
.remove = __devexit_p(cciss_remove_one),
.id_table = cciss_pci_device_id, /* id_table */
.shutdown = cciss_remove_one,
.shutdown = cciss_shutdown,
};
/*