5.4-stable review patch. If anyone has any objections, please let me know.
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From: Tom Lendacky thomas.lendacky@amd.com
commit 07bb097b92b987db518e72525b515d77904e966e upstream.
Currently, the ASP primary device check does not have support for PCI domains, and, as a result, when the system is configured with PCI domains (PCI segments) the wrong device can be selected as primary. This results in commands submitted to the device timing out and failing. The device check also relies on specific device and function assignments that may not hold in the future.
Fix the primary ASP device check to include support for PCI domains and to perform proper checking of the Bus/Device/Function positions.
Fixes: 2a6170dfe755 ("crypto: ccp: Add Platform Security Processor (PSP) device support") Cc: stable@vger.kernel.org Signed-off-by: Tom Lendacky thomas.lendacky@amd.com Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/crypto/ccp/sp-pci.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-)
--- a/drivers/crypto/ccp/sp-pci.c +++ b/drivers/crypto/ccp/sp-pci.c @@ -118,14 +118,17 @@ static bool sp_pci_is_master(struct sp_d pdev_new = to_pci_dev(dev_new); pdev_cur = to_pci_dev(dev_cur);
- if (pdev_new->bus->number < pdev_cur->bus->number) - return true; + if (pci_domain_nr(pdev_new->bus) != pci_domain_nr(pdev_cur->bus)) + return pci_domain_nr(pdev_new->bus) < pci_domain_nr(pdev_cur->bus);
- if (PCI_SLOT(pdev_new->devfn) < PCI_SLOT(pdev_cur->devfn)) - return true; + if (pdev_new->bus->number != pdev_cur->bus->number) + return pdev_new->bus->number < pdev_cur->bus->number;
- if (PCI_FUNC(pdev_new->devfn) < PCI_FUNC(pdev_cur->devfn)) - return true; + if (PCI_SLOT(pdev_new->devfn) != PCI_SLOT(pdev_cur->devfn)) + return PCI_SLOT(pdev_new->devfn) < PCI_SLOT(pdev_cur->devfn); + + if (PCI_FUNC(pdev_new->devfn) != PCI_FUNC(pdev_cur->devfn)) + return PCI_FUNC(pdev_new->devfn) < PCI_FUNC(pdev_cur->devfn);
return false; }