efi_loader: fix iteration of FMP protocols

If one of the FMP protocols fails when calling GetImageInfo(),
populating the ESRT ends up with failure and other FMP protocols
are not added to the ESRT. We should still add all other FMP
protocols to the ESRT.

With this commit, iteration of all FMP protocols continues
even though one of the FMP protocols fails.

Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Tested-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>

diff --git a/lib/efi_loader/efi_esrt.c b/lib/efi_loader/efi_esrt.c
index dafd447b6d760e66cdba150da1a3dd9cc96aeb7a..443bd999ce11395bbef8182204f269ee83b92ce3 100644 (file)
--- a/lib/efi_loader/efi_esrt.c
+++ b/lib/efi_loader/efi_esrt.c
@@ -364,7 +364,7 @@ efi_status_t efi_esrt_populate(void)
                if (ret != EFI_SUCCESS) {
                        EFI_PRINT("ESRT Unable to find FMP handle (%u)\n",
                                  idx);
-                       goto out;
+                       continue;
                }
                fmp = handler->protocol_interface;
 
@@ -379,15 +379,14 @@ efi_status_t efi_esrt_populate(void)
                         * fmp->get_image_info to return BUFFER_TO_SMALL.
                         */
                        EFI_PRINT("ESRT erroneous FMP implementation\n");
-                       ret = EFI_INVALID_PARAMETER;
-                       goto out;
+                       continue;
                }
 
                ret = efi_allocate_pool(EFI_BOOT_SERVICES_DATA, info_size,
                                        (void **)&img_info);
                if (ret != EFI_SUCCESS) {
                        EFI_PRINT("ESRT failed to allocate memory for image info\n");
-                       goto out;
+                       continue;
                }
 
                /*
@@ -405,7 +404,7 @@ efi_status_t efi_esrt_populate(void)
                if (ret != EFI_SUCCESS) {
                        EFI_PRINT("ESRT failed to obtain image info from FMP\n");
                        efi_free_pool(img_info);
-                       goto out;
+                       continue;
                }
 
                num_entries += desc_count;
@@ -413,6 +412,13 @@ efi_status_t efi_esrt_populate(void)
                efi_free_pool(img_info);
        }
 
+       /* error occurs in fmp->get_image_info() if num_entries is 0 here */
+       if (!num_entries) {
+               EFI_PRINT("Error occurs, num_entries should not be 0\n");
+               ret = EFI_INVALID_PARAMETER;
+               goto out;
+       }
+
        EFI_PRINT("ESRT create table with %u entries\n", num_entries);
        /*
         * Allocate an ESRT with the sufficient number of entries to accommodate
@@ -436,7 +442,7 @@ efi_status_t efi_esrt_populate(void)
                if (ret != EFI_SUCCESS) {
                        EFI_PRINT("ESRT unable to find FMP handle (%u)\n",
                                  idx);
-                       break;
+                       continue;
                }
                fmp = handler->protocol_interface;