On Mon, 2007-05-14 at 17:53 +0000, Gerald Britton wrote:
> 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.
Sorry I've taken so long to reply. I've been testing this patch with up
to 512 logical volumes. Looks good. I may make a tweak or 2 after it's
merged, I have other changes that touch the same code.
ACKed-by: Mike Miller <[email protected]>
>
> Signed-off-by: Gerald Britton <[email protected]>
> ---
> 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
> @@ -3469,13 +3469,39 @@ 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, j;
> + 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;
> +
> if (pci_get_drvdata(pdev) == NULL) {
> printk(KERN_ERR "cciss: Unable to remove device \n");
> return;
> @@ -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,
> };
>
> /*
-
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