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cciss: do not attempt PCI power management reset method if we know it won't work.

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Just go straight to the soft-reset method instead.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
This commit is contained in:
Stephen M. Cameron 2011-05-03 14:54:02 -05:00 committed by Jens Axboe
parent 93c46c2fa7
commit ec52d5f1cb
1 changed files with 31 additions and 5 deletions
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36
drivers/block/cciss.c
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@ -558,7 +558,7 @@ static void __devinit cciss_procinit(ctlr_info_t *h)
#define to_hba(n) container_of(n, struct ctlr_info, dev)
#define to_drv(n) container_of(n, drive_info_struct, dev)
/* List of controllers which cannot be reset on kexec with reset_devices */
/* List of controllers which cannot be hard reset on kexec with reset_devices */
static u32 unresettable_controller[] = {
0x324a103C, /* Smart Array P712m */
0x324b103C, /* SmartArray P711m */
@ -576,23 +576,45 @@ static u32 unresettable_controller[] = {
0x409D0E11, /* Smart Array 6400 EM */
};
static int ctlr_is_resettable(struct ctlr_info *h)
/* List of controllers which cannot even be soft reset */
static u32 soft_unresettable_controller[] = {
0x409C0E11, /* Smart Array 6400 */
0x409D0E11, /* Smart Array 6400 EM */
};
static int ctlr_is_hard_resettable(u32 board_id)
{
int i;
for (i = 0; i < ARRAY_SIZE(unresettable_controller); i++)
if (unresettable_controller[i] == h->board_id)
if (unresettable_controller[i] == board_id)
return 0;
return 1;
}
static int ctlr_is_soft_resettable(u32 board_id)
{
int i;
for (i = 0; i < ARRAY_SIZE(soft_unresettable_controller); i++)
if (soft_unresettable_controller[i] == board_id)
return 0;
return 1;
}
static int ctlr_is_resettable(u32 board_id)
{
return ctlr_is_hard_resettable(board_id) ||
ctlr_is_soft_resettable(board_id);
}
static ssize_t host_show_resettable(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct ctlr_info *h = to_hba(dev);
return snprintf(buf, 20, "%d\n", ctlr_is_resettable(h));
return snprintf(buf, 20, "%d\n", ctlr_is_resettable(h->board_id));
}
static DEVICE_ATTR(resettable, S_IRUGO, host_show_resettable, NULL);
@ -4601,12 +4623,16 @@ static __devinit int cciss_kdump_hard_reset_controller(struct pci_dev *pdev)
* likely not be happy. Just forbid resetting this conjoined mess.
*/
cciss_lookup_board_id(pdev, &board_id);
if (board_id == 0x409C0E11 || board_id == 0x409D0E11) {
if (!ctlr_is_resettable(board_id)) {
dev_warn(&pdev->dev, "Cannot reset Smart Array 640x "
"due to shared cache module.");
return -ENODEV;
}
/* if controller is soft- but not hard resettable... */
if (!ctlr_is_hard_resettable(board_id))
return -ENOTSUPP; /* try soft reset later. */
/* Save the PCI command register */
pci_read_config_word(pdev, 4, &command_register);
/* Turn the board off. This is so that later pci_restore_state()