Re: [PATCH] [SCSI] qla2xxx: Handle the INTx not connected while passing through
From: Madhavan Srinivasan <maddy@linux.ibm.com>
Date: 2026-06-03 08:12:58
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linux-scsi, lkml
On 5/15/26 7:15 PM, Shivaprasad G Bhat wrote:
The PCI_INTERRUPT_PIN reports if the device supports the INTx. However, when the device is assigned to a guest via vfio, the PCI_INTERRUPT_PIN is set to 0(i.e none) if the line is not connected and|or the platform cannot route the interrupt. In such cases, the guest PCI_INTERRUPT_PIN is 0 and the port number becomes -1(255, uint8_t underflow) for qla[25|27|28]xx and qla2031 devices. The flt_region_nvram is never set, and subsequently the lun detection fails. Below warnings show the NVRAM configuration failure. []-0073:1: Inconsistent NVRAM checksum=0xffffffc0 id=HCAM version=0x100. []-0074:1: Falling back to functioning (yet invalid -- WWPN) defaults. []-0076:1: NVRAM configuration failed. The patch handles the case, and sets the port_no to devfn like its done everywhere else.
Any update on this? do you have any comments/concerns that should be addressed Maddy
quoted hunk
Reference: commit 2bd42b03ab6b ("vfio/pci: Virtualize zero INTx PIN if no pdev->irq") Signed-off-by: Shivaprasad G Bhat <redacted> --- drivers/scsi/qla2xxx/qla_os.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-)diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c index 72b1c28e4dae..a8d6a0a021f4 100644 --- a/drivers/scsi/qla2xxx/qla_os.c +++ b/drivers/scsi/qla2xxx/qla_os.c@@ -2803,11 +2803,16 @@ qla2x00_set_isp_flags(struct qla_hw_data *ha) else { /* Get adapter physical port no from interrupt pin register. */ pci_read_config_byte(ha->pdev, PCI_INTERRUPT_PIN, &ha->port_no); - if (IS_QLA25XX(ha) || IS_QLA2031(ha) || - IS_QLA27XX(ha) || IS_QLA28XX(ha)) - ha->port_no--; - else - ha->port_no = !(ha->port_no & 1); + if (ha->port_no == 0) { + /* None of INT[A|B|C|D], may be virtualized by vfio */ + ha->port_no = PCI_FUNC(ha->pdev->devfn); + } else { + if (IS_QLA25XX(ha) || IS_QLA2031(ha) || + IS_QLA27XX(ha) || IS_QLA28XX(ha)) + ha->port_no--; + else + ha->port_no = !(ha->port_no & 1); + } } ql_dbg_pci(ql_dbg_init, ha->pdev, 0x000b,