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>
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 370dfe1..5acc6c4 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -3469,12 +3469,38 @@
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 @@
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 @@
.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,
};
/*
