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IB/hfi1: Check upper-case EFI variables

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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 <easwar.hariharan@intel.com>
Signed-off-by: Sebastian Sanchez <sebastian.sanchez@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Sebastian Sanchez
2017-02-08 05:26:55 -08:00
committed by Doug Ledford
parent 76327627be
commit c03c08d50b
1 changed files with 22 additions and 4 deletions
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26
drivers/infiniband/hw/hfi1/efivar.c
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@ -45,6 +45,7 @@
* *
*/ */
#include <linux/ctype.h>
#include "efivar.h" #include "efivar.h"
/* GUID for HFI1 variables in EFI */ /* GUID for HFI1 variables in EFI */
@ -150,15 +151,32 @@ fail:
int read_hfi1_efi_var(struct hfi1_devdata *dd, const char *kind, int read_hfi1_efi_var(struct hfi1_devdata *dd, const char *kind,
unsigned long *size, void **return_data) unsigned long *size, void **return_data)
{ {
char prefix_name[64];
char name[64]; char name[64];
int result;
int i;
/* create a common prefix */ /* 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), pci_domain_nr(dd->pcidev->bus),
dd->pcidev->bus->number, dd->pcidev->bus->number,
PCI_SLOT(dd->pcidev->devfn), PCI_SLOT(dd->pcidev->devfn),
PCI_FUNC(dd->pcidev->devfn), PCI_FUNC(dd->pcidev->devfn));
kind); 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); /*
* 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 result;
} }