api: storage: Fix enumeration of storage devices

dev_stor_get() is not able to find the next available device in the current
storage group when the previous enumerated device belongs to a different
group or class (e.g. network).

The root cause is the device group iterator not being reset after an
unsuccessful search for the last returned device so that the following
search for the next available device will start from beginning.

The issue has been identified by loading and booting GRUB in a QEMU
vexpress-a9 environment.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@iquestgroup.com>

diff --git a/api/api_storage.c b/api/api_storage.c
index 8aeeda2715f4ebf1971ac5abd6f0b563da2e0bbd..2b90c18aaec93a1dcb8914e80e37d41842d88980 100644 (file)
--- a/api/api_storage.c
+++ b/api/api_storage.c
@@ -99,6 +99,7 @@ static int dev_stor_get(int type, int *more, struct device_info *di)
 {
        struct blk_desc *dd;
        int found = 0;
+       int found_last = 0;
        int i = 0;
 
        /* Wasn't configured for this type, return 0 directly */
@@ -111,9 +112,13 @@ static int dev_stor_get(int type, int *more, struct device_info *di)
                        if (di->cookie ==
                            (void *)blk_get_dev(specs[type].name, i)) {
                                i += 1;
+                               found_last = 1;
                                break;
                        }
                }
+
+               if (!found_last)
+                       i = 0;
        }
 
        for (; i < specs[type].max_dev; i++) {