From c03c08d50b3d44cd331319b4b2882315413ee281 Mon Sep 17 00:00:00 2001 From: Sebastian Sanchez Date: Wed, 8 Feb 2017 05:26:55 -0800 Subject: [PATCH] IB/hfi1: Check upper-case EFI variables The EFI variable that provides board ID is named by the PCI address of the device, which is published in upper-case, while the HFI1 driver reads the EFI variable in lower-case. This prevents returning the correct board id when queried through sysfs. Read EFI variables in upper-case if the lower-case read fails. Reviewed-by: Easwar Hariharan Signed-off-by: Sebastian Sanchez Signed-off-by: Dennis Dalessandro Signed-off-by: Doug Ledford --- drivers/infiniband/hw/hfi1/efivar.c | 26 ++++++++++++++++++++++---- 1 file changed, 22 insertions(+), 4 deletions(-) diff --git a/drivers/infiniband/hw/hfi1/efivar.c b/drivers/infiniband/hw/hfi1/efivar.c index 106349fc1fb9..d106d23016ba 100644 --- a/drivers/infiniband/hw/hfi1/efivar.c +++ b/drivers/infiniband/hw/hfi1/efivar.c @@ -45,6 +45,7 @@ * */ +#include #include "efivar.h" /* GUID for HFI1 variables in EFI */ @@ -150,15 +151,32 @@ fail: int read_hfi1_efi_var(struct hfi1_devdata *dd, const char *kind, unsigned long *size, void **return_data) { + char prefix_name[64]; char name[64]; + int result; + int i; /* create a common prefix */ - snprintf(name, sizeof(name), "%04x:%02x:%02x.%x-%s", + snprintf(prefix_name, sizeof(prefix_name), "%04x:%02x:%02x.%x", pci_domain_nr(dd->pcidev->bus), dd->pcidev->bus->number, PCI_SLOT(dd->pcidev->devfn), - PCI_FUNC(dd->pcidev->devfn), - kind); + PCI_FUNC(dd->pcidev->devfn)); + snprintf(name, sizeof(name), "%s-%s", prefix_name, kind); + result = read_efi_var(name, size, return_data); + + /* + * If reading the lowercase EFI variable fail, read the uppercase + * variable. + */ + if (result) { + /* Converting to uppercase */ + for (i = 0; prefix_name[i]; i++) + if (isalpha(prefix_name[i])) + prefix_name[i] = toupper(prefix_name[i]); + snprintf(name, sizeof(name), "%s-%s", prefix_name, kind); + result = read_efi_var(name, size, return_data); + } - return read_efi_var(name, size, return_data); + return result; } -- 2.20.1