On 6/1/2018 9:46 AM, Sinan Kaya wrote:
'Commit cc27b735ad3a ("PCI/portdrv: Turn off PCIe services during shutdown")' has been added to kernel to shutdown pending PCIe port service interrupts during reboot so that a newly started kexec kernel wouldn't observe pending interrupts.
pcie_port_device_remove() is disabling the root port and switches by calling pci_disable_device() after all PCIe service drivers are shutdown.
This has been found to cause crashes on HP DL360 Gen9 machines during reboot due to hpsa driver not clearing the bus master bit during the shutdown procedure by calling pci_disable_device().
Disable device as part of the shutdown sequence.
Forgot to change the commit title. Apologies for that. The rest of the patch should work. Waiting for tested-bys.
Signed-off-by: Sinan Kaya okaya@codeaurora.org Link: https://bugzilla.kernel.org/show_bug.cgi?id=199779 Fixes: cc27b735ad3a ("PCI/portdrv: Turn off PCIe services during shutdown") Cc: stable@vger.kernel.org Reported-by: Ryan Finnie ryan@finnie.org
drivers/scsi/hpsa.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c index 3a9eca1..b92f86a 100644 --- a/drivers/scsi/hpsa.c +++ b/drivers/scsi/hpsa.c @@ -8869,7 +8869,7 @@ static void hpsa_disable_rld_caching(struct ctlr_info *h) kfree(options); } -static void hpsa_shutdown(struct pci_dev *pdev) +static void __hpsa_shutdown(struct pci_dev *pdev) { struct ctlr_info *h; @@ -8884,6 +8884,12 @@ static void hpsa_shutdown(struct pci_dev *pdev) hpsa_disable_interrupt_mode(h); /* pci_init 2 */ } +static void hpsa_shutdown(struct pci_dev *pdev) +{
- __hpsa_shutdown(pdev);
- pci_disable_device(pdev);
+}
static void hpsa_free_device_info(struct ctlr_info *h) { int i; @@ -8927,7 +8933,7 @@ static void hpsa_remove_one(struct pci_dev *pdev) scsi_remove_host(h->scsi_host); /* init_one 8 */ /* includes hpsa_free_irqs - init_one 4 */ /* includes hpsa_disable_interrupt_mode - pci_init 2 */
- hpsa_shutdown(pdev);
- __hpsa_shutdown(pdev);
hpsa_free_device_info(h); /* scan */