* [PATCH] hpsa: refine the pci enble/disable handling
@ 2014-06-12 15:29 Tomas Henzl
2014-07-07 14:12 ` Tomas Henzl
0 siblings, 1 reply; 3+ messages in thread
From: Tomas Henzl @ 2014-06-12 15:29 UTC (permalink / raw)
To: 'linux-scsi@vger.kernel.org'
Cc: stephenmcameron, michael.miller, Handzik, Joe
When a second(kdump) kernel starts and the hard reset method is used
the driver calls pci_disable_device without previously enabling it,
so the kernel shows a warning -
[ 16.876248] WARNING: at drivers/pci/pci.c:1431 pci_disable_device+0x84/0x90()
[ 16.882686] Device hpsa
disabling already-disabled device
...
This patch fixes it, in addition to this I tried to balance also some other pairs
of enable/disable device in the driver.
Unfortunately I wasn't able to verify the functionality for the case of a sw reset,
because of a lack of proper hw.
Signed-off-by: Tomas Henzl <thenzl@redhat.com>
---
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index 5858600..67c41b9 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -5983,7 +5983,6 @@ static int hpsa_kdump_hard_reset_controller(struct pci_dev *pdev)
/* Turn the board off. This is so that later pci_restore_state()
* won't turn the board on before the rest of config space is ready.
*/
- pci_disable_device(pdev);
pci_save_state(pdev);
/* find the first memory BAR, so we can find the cfg table */
@@ -6031,11 +6030,6 @@ static int hpsa_kdump_hard_reset_controller(struct pci_dev *pdev)
goto unmap_cfgtable;
pci_restore_state(pdev);
- rc = pci_enable_device(pdev);
- if (rc) {
- dev_warn(&pdev->dev, "failed to enable device.\n");
- goto unmap_cfgtable;
- }
pci_write_config_word(pdev, 4, command_register);
/* Some devices (notably the HP Smart Array 5i Controller)
@@ -6548,6 +6542,12 @@ static int hpsa_init_reset_devices(struct pci_dev *pdev)
if (!reset_devices)
return 0;
+ rc = pci_enable_device(pdev);
+ if (rc) {
+ dev_warn(&pdev->dev, "failed to enable device.\n");
+ return -ENODEV;
+ }
+
/* Reset the controller with a PCI power-cycle or via doorbell */
rc = hpsa_kdump_hard_reset_controller(pdev);
@@ -6556,10 +6556,11 @@ static int hpsa_init_reset_devices(struct pci_dev *pdev)
* "performant mode". Or, it might be 640x, which can't reset
* due to concerns about shared bbwc between 6402/6404 pair.
*/
- if (rc == -ENOTSUPP)
- return rc; /* just try to do the kdump anyhow. */
- if (rc)
- return -ENODEV;
+ if (rc) {
+ if (rc != -ENOTSUPP) /* just try to do the kdump anyhow. */
+ rc = -ENODEV;
+ goto out_disable;
+ }
/* Now try to get the controller to respond to a no-op */
dev_warn(&pdev->dev, "Waiting for controller to respond to no-op\n");
@@ -6570,7 +6571,11 @@ static int hpsa_init_reset_devices(struct pci_dev *pdev)
dev_warn(&pdev->dev, "no-op failed%s\n",
(i < 11 ? "; re-trying" : ""));
}
- return 0;
+
+out_disable:
+
+ pci_disable_device(pdev);
+ return rc;
}
static int hpsa_allocate_cmd_pool(struct ctlr_info *h)
@@ -6722,6 +6727,7 @@ static void hpsa_undo_allocations_after_kdump_soft_reset(struct ctlr_info *h)
iounmap(h->transtable);
if (h->cfgtable)
iounmap(h->cfgtable);
+ pci_disable_device(h->pdev);
pci_release_regions(h->pdev);
kfree(h);
}
--
1.8.3.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] hpsa: refine the pci enble/disable handling
2014-06-12 15:29 [PATCH] hpsa: refine the pci enble/disable handling Tomas Henzl
@ 2014-07-07 14:12 ` Tomas Henzl
2014-07-07 15:45 ` Handzik, Joe
0 siblings, 1 reply; 3+ messages in thread
From: Tomas Henzl @ 2014-07-07 14:12 UTC (permalink / raw)
To: 'linux-scsi@vger.kernel.org'
Cc: stephenmcameron, michael.miller, Handzik, Joe
Steve, Joe,
any chance you could review this patch and verify the sw reset case?
Thanks, Tomas
On 06/12/2014 05:29 PM, Tomas Henzl wrote:
> When a second(kdump) kernel starts and the hard reset method is used
> the driver calls pci_disable_device without previously enabling it,
> so the kernel shows a warning -
> [ 16.876248] WARNING: at drivers/pci/pci.c:1431 pci_disable_device+0x84/0x90()
> [ 16.882686] Device hpsa
> disabling already-disabled device
> ...
> This patch fixes it, in addition to this I tried to balance also some other pairs
> of enable/disable device in the driver.
> Unfortunately I wasn't able to verify the functionality for the case of a sw reset,
> because of a lack of proper hw.
>
> Signed-off-by: Tomas Henzl <thenzl@redhat.com>
> ---
> diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
> index 5858600..67c41b9 100644
> --- a/drivers/scsi/hpsa.c
> +++ b/drivers/scsi/hpsa.c
> @@ -5983,7 +5983,6 @@ static int hpsa_kdump_hard_reset_controller(struct pci_dev *pdev)
> /* Turn the board off. This is so that later pci_restore_state()
> * won't turn the board on before the rest of config space is ready.
> */
> - pci_disable_device(pdev);
> pci_save_state(pdev);
>
> /* find the first memory BAR, so we can find the cfg table */
> @@ -6031,11 +6030,6 @@ static int hpsa_kdump_hard_reset_controller(struct pci_dev *pdev)
> goto unmap_cfgtable;
>
> pci_restore_state(pdev);
> - rc = pci_enable_device(pdev);
> - if (rc) {
> - dev_warn(&pdev->dev, "failed to enable device.\n");
> - goto unmap_cfgtable;
> - }
> pci_write_config_word(pdev, 4, command_register);
>
> /* Some devices (notably the HP Smart Array 5i Controller)
> @@ -6548,6 +6542,12 @@ static int hpsa_init_reset_devices(struct pci_dev *pdev)
> if (!reset_devices)
> return 0;
>
> + rc = pci_enable_device(pdev);
> + if (rc) {
> + dev_warn(&pdev->dev, "failed to enable device.\n");
> + return -ENODEV;
> + }
> +
> /* Reset the controller with a PCI power-cycle or via doorbell */
> rc = hpsa_kdump_hard_reset_controller(pdev);
>
> @@ -6556,10 +6556,11 @@ static int hpsa_init_reset_devices(struct pci_dev *pdev)
> * "performant mode". Or, it might be 640x, which can't reset
> * due to concerns about shared bbwc between 6402/6404 pair.
> */
> - if (rc == -ENOTSUPP)
> - return rc; /* just try to do the kdump anyhow. */
> - if (rc)
> - return -ENODEV;
> + if (rc) {
> + if (rc != -ENOTSUPP) /* just try to do the kdump anyhow. */
> + rc = -ENODEV;
> + goto out_disable;
> + }
>
> /* Now try to get the controller to respond to a no-op */
> dev_warn(&pdev->dev, "Waiting for controller to respond to no-op\n");
> @@ -6570,7 +6571,11 @@ static int hpsa_init_reset_devices(struct pci_dev *pdev)
> dev_warn(&pdev->dev, "no-op failed%s\n",
> (i < 11 ? "; re-trying" : ""));
> }
> - return 0;
> +
> +out_disable:
> +
> + pci_disable_device(pdev);
> + return rc;
> }
>
> static int hpsa_allocate_cmd_pool(struct ctlr_info *h)
> @@ -6722,6 +6727,7 @@ static void hpsa_undo_allocations_after_kdump_soft_reset(struct ctlr_info *h)
> iounmap(h->transtable);
> if (h->cfgtable)
> iounmap(h->cfgtable);
> + pci_disable_device(h->pdev);
> pci_release_regions(h->pdev);
> kfree(h);
> }
^ permalink raw reply [flat|nested] 3+ messages in thread
* RE: [PATCH] hpsa: refine the pci enble/disable handling
2014-07-07 14:12 ` Tomas Henzl
@ 2014-07-07 15:45 ` Handzik, Joe
0 siblings, 0 replies; 3+ messages in thread
From: Handzik, Joe @ 2014-07-07 15:45 UTC (permalink / raw)
To: Tomas Henzl, 'linux-scsi@vger.kernel.org'
Cc: stephenmcameron, michael.miller
I'll take a look when I get a chance, Steve's out on vacation all week. At first glance it looks good, but like you said...gotta test it.
Joe
-----Original Message-----
From: Tomas Henzl [mailto:thenzl@redhat.com]
Sent: Monday, July 07, 2014 9:13 AM
To: 'linux-scsi@vger.kernel.org'
Cc: stephenmcameron@gmail.com; michael.miller@canonical.com; Handzik, Joe
Subject: Re: [PATCH] hpsa: refine the pci enble/disable handling
Steve, Joe,
any chance you could review this patch and verify the sw reset case?
Thanks, Tomas
On 06/12/2014 05:29 PM, Tomas Henzl wrote:
> When a second(kdump) kernel starts and the hard reset method is used
> the driver calls pci_disable_device without previously enabling it, so
> the kernel shows a warning -
> [ 16.876248] WARNING: at drivers/pci/pci.c:1431 pci_disable_device+0x84/0x90()
> [ 16.882686] Device hpsa
> disabling already-disabled device
> ...
> This patch fixes it, in addition to this I tried to balance also some
> other pairs of enable/disable device in the driver.
> Unfortunately I wasn't able to verify the functionality for the case
> of a sw reset, because of a lack of proper hw.
>
> Signed-off-by: Tomas Henzl <thenzl@redhat.com>
> ---
> diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c index
> 5858600..67c41b9 100644
> --- a/drivers/scsi/hpsa.c
> +++ b/drivers/scsi/hpsa.c
> @@ -5983,7 +5983,6 @@ static int hpsa_kdump_hard_reset_controller(struct pci_dev *pdev)
> /* Turn the board off. This is so that later pci_restore_state()
> * won't turn the board on before the rest of config space is ready.
> */
> - pci_disable_device(pdev);
> pci_save_state(pdev);
>
> /* find the first memory BAR, so we can find the cfg table */ @@
> -6031,11 +6030,6 @@ static int hpsa_kdump_hard_reset_controller(struct pci_dev *pdev)
> goto unmap_cfgtable;
>
> pci_restore_state(pdev);
> - rc = pci_enable_device(pdev);
> - if (rc) {
> - dev_warn(&pdev->dev, "failed to enable device.\n");
> - goto unmap_cfgtable;
> - }
> pci_write_config_word(pdev, 4, command_register);
>
> /* Some devices (notably the HP Smart Array 5i Controller) @@
> -6548,6 +6542,12 @@ static int hpsa_init_reset_devices(struct pci_dev *pdev)
> if (!reset_devices)
> return 0;
>
> + rc = pci_enable_device(pdev);
> + if (rc) {
> + dev_warn(&pdev->dev, "failed to enable device.\n");
> + return -ENODEV;
> + }
> +
> /* Reset the controller with a PCI power-cycle or via doorbell */
> rc = hpsa_kdump_hard_reset_controller(pdev);
>
> @@ -6556,10 +6556,11 @@ static int hpsa_init_reset_devices(struct pci_dev *pdev)
> * "performant mode". Or, it might be 640x, which can't reset
> * due to concerns about shared bbwc between 6402/6404 pair.
> */
> - if (rc == -ENOTSUPP)
> - return rc; /* just try to do the kdump anyhow. */
> - if (rc)
> - return -ENODEV;
> + if (rc) {
> + if (rc != -ENOTSUPP) /* just try to do the kdump anyhow. */
> + rc = -ENODEV;
> + goto out_disable;
> + }
>
> /* Now try to get the controller to respond to a no-op */
> dev_warn(&pdev->dev, "Waiting for controller to respond to
> no-op\n"); @@ -6570,7 +6571,11 @@ static int hpsa_init_reset_devices(struct pci_dev *pdev)
> dev_warn(&pdev->dev, "no-op failed%s\n",
> (i < 11 ? "; re-trying" : ""));
> }
> - return 0;
> +
> +out_disable:
> +
> + pci_disable_device(pdev);
> + return rc;
> }
>
> static int hpsa_allocate_cmd_pool(struct ctlr_info *h) @@ -6722,6
> +6727,7 @@ static void hpsa_undo_allocations_after_kdump_soft_reset(struct ctlr_info *h)
> iounmap(h->transtable);
> if (h->cfgtable)
> iounmap(h->cfgtable);
> + pci_disable_device(h->pdev);
> pci_release_regions(h->pdev);
> kfree(h);
> }
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2014-07-07 15:46 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2014-06-12 15:29 [PATCH] hpsa: refine the pci enble/disable handling Tomas Henzl
2014-07-07 14:12 ` Tomas Henzl
2014-07-07 15:45 ` Handzik, Joe
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