x86/efi: Adding efi_printks on memory allocationa and pci.reads

All other calls to allocate memory seem to make some noise already, with the
exception of two calls (for gop, uga) in the setup_graphics path.

The purpose is to be noisy on worrysome errors immediately.

commit fb86b2440de0 ("x86/efi: Add better error logging to EFI boot
stub") introduces printing false alarms for lots of hardware. Rather
than playing Whack a Mole with non-fatal exit conditions, try the other
way round.

This is per Matt Fleming's suggestion:

> Where I think we could improve things
> is by adding efi_printk() message in certain error paths. Clearly, not
> all error paths need such messages, e.g. the EFI_INVALID_PARAMETER path
> you highlighted above, but it makes sense for memory allocation and PCI
> read failures.

Link: http://article.gmane.org/gmane.linux.kernel.efi/4628
Signed-off-by: Andre Müller <andre.muller@web.de>
Cc: Ulf Winkelvos <ulf@winkelvos.de>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>

1 files changed, 21 insertions, 7 deletions

diff --git a/arch/x86/boot/compressed/eboot.c b/arch/x86/boot/compressed/eboot.c
index f4bdab1dbf66..ed8e06c59a4c 100644
--- a/arch/x86/boot/compressed/eboot.c
+++ b/arch/x86/boot/compressed/eboot.c
@@ -323,8 +323,10 @@ __setup_efi_pci32(efi_pci_io_protocol_32 *pci, struct pci_setup_rom **__rom)
         size = pci->romsize + sizeof(*rom);
 
         status = efi_call_early(allocate_pool, EFI_LOADER_DATA, size, &rom);
-        if (status != EFI_SUCCESS)
+        if (status != EFI_SUCCESS) {
+                efi_printk(sys_table, "Failed to alloc mem for rom\n");
                 return status;
+        }
 
         memset(rom, 0, sizeof(*rom));
 
@@ -337,14 +339,18 @@ __setup_efi_pci32(efi_pci_io_protocol_32 *pci, struct pci_setup_rom **__rom)
         status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
                                  PCI_VENDOR_ID, 1, &(rom->vendor));
 
-        if (status != EFI_SUCCESS)
+        if (status != EFI_SUCCESS) {
+                efi_printk(sys_table, "Failed to read rom->vendor\n");
                 goto free_struct;
+        }
 
         status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
                                  PCI_DEVICE_ID, 1, &(rom->devid));
 
-        if (status != EFI_SUCCESS)
+        if (status != EFI_SUCCESS) {
+                efi_printk(sys_table, "Failed to read rom->devid\n");
                 goto free_struct;
+        }
 
         status = efi_early->call(pci->get_location, pci, &(rom->segment),
                                  &(rom->bus), &(rom->device), &(rom->function));
@@ -427,8 +433,10 @@ __setup_efi_pci64(efi_pci_io_protocol_64 *pci, struct pci_setup_rom **__rom)
         size = pci->romsize + sizeof(*rom);
 
         status = efi_call_early(allocate_pool, EFI_LOADER_DATA, size, &rom);
-        if (status != EFI_SUCCESS)
+        if (status != EFI_SUCCESS) {
+                efi_printk(sys_table, "Failed to alloc mem for rom\n");
                 return status;
+        }
 
         rom->data.type = SETUP_PCI;
         rom->data.len = size - sizeof(struct setup_data);
@@ -439,14 +447,18 @@ __setup_efi_pci64(efi_pci_io_protocol_64 *pci, struct pci_setup_rom **__rom)
         status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
                                  PCI_VENDOR_ID, 1, &(rom->vendor));
 
-        if (status != EFI_SUCCESS)
+        if (status != EFI_SUCCESS) {
+                efi_printk(sys_table, "Failed to read rom->vendor\n");
                 goto free_struct;
+        }
 
         status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
                                  PCI_DEVICE_ID, 1, &(rom->devid));
 
-        if (status != EFI_SUCCESS)
+        if (status != EFI_SUCCESS) {
+                efi_printk(sys_table, "Failed to read rom->devid\n");
                 goto free_struct;
+        }
 
         status = efi_early->call(pci->get_location, pci, &(rom->segment),
                                  &(rom->bus), &(rom->device), &(rom->function));
@@ -526,8 +538,10 @@ static efi_status_t setup_efi_pci(struct boot_params *params)
                                         EFI_LOADER_DATA,
                                         size, (void **)&pci_handle);
 
-                if (status != EFI_SUCCESS)
+                if (status != EFI_SUCCESS) {
+                        efi_printk(sys_table, "Failed to alloc mem for pci_handle\n");
                         return status;
+                }
 
                 status = efi_call_early(locate_handle,
                                         EFI_LOCATE_BY_PROTOCOL, &pci_proto,