[PATCH 1/2] QEMU: extract file_load() function from rom_add_file() for reusing

[Olivia Yin <hong-hua.yin@xxxxxxxxxxxxx>]

Sanity check in rom_add_file() could be reused by other image loaders.

Signed-off-by: Olivia Yin <hong-hua.yin@xxxxxxxxxxxxx>
---
This patch is based on branch 'ppc-next' of Alex's upstream QEMU repo:
http://repo.or.cz/r/qemu/agraf.git

 hw/loader.c |   61 +++++++++++++++++++++++++++++++---------------------------
 1 files changed, 33 insertions(+), 28 deletions(-)

diff --git a/hw/loader.c b/hw/loader.c
index 33acc2f..8475850 100644
--- a/hw/loader.c
+++ b/hw/loader.c
@@ -86,6 +86,36 @@ int load_image(const char *filename, uint8_t *addr)
     return size;
 }
 
+static int file_load(const char *file, uint8_t **data)
+{
+    int rc, fd = -1;
+    int size;
+
+    fd = open(file, O_RDONLY | O_BINARY);
+    if (fd == -1) {
+        fprintf(stderr, "Could not open file '%s': %s\n",
+                file, strerror(errno));
+        goto err;
+    }
+
+    size = lseek(fd, 0, SEEK_END);
+    *data = g_malloc0(size);
+    lseek(fd, 0, SEEK_SET);
+    rc = read(fd, *data, size);
+    if (rc != size) {
+        fprintf(stderr, "file %-20s: read error: rc=%d (expected %zd)\n",
+                file, rc, size);
+        goto err;
+    }
+    close(fd);
+    return size;
+err:
+    if (fd != -1)
+        close(fd);
+    g_free(*data);
+    return -1;
+}
+
 /* read()-like version */
 ssize_t read_targphys(const char *name,
                       int fd, target_phys_addr_t dst_addr, size_t nbytes)
@@ -568,38 +598,22 @@ int rom_add_file(const char *file, const char *fw_dir,
                  target_phys_addr_t addr, int32_t bootindex)
 {
     Rom *rom;
-    int rc, fd = -1;
     char devpath[100];
 
     rom = g_malloc0(sizeof(*rom));
     rom->name = g_strdup(file);
+    rom->addr = addr;
     rom->path = qemu_find_file(QEMU_FILE_TYPE_BIOS, rom->name);
     if (rom->path == NULL) {
         rom->path = g_strdup(file);
     }
 
-    fd = open(rom->path, O_RDONLY | O_BINARY);
-    if (fd == -1) {
-        fprintf(stderr, "Could not open option rom '%s': %s\n",
-                rom->path, strerror(errno));
-        goto err;
-    }
-
     if (fw_dir) {
         rom->fw_dir  = g_strdup(fw_dir);
         rom->fw_file = g_strdup(file);
     }
-    rom->addr    = addr;
-    rom->romsize = lseek(fd, 0, SEEK_END);
-    rom->data    = g_malloc0(rom->romsize);
-    lseek(fd, 0, SEEK_SET);
-    rc = read(fd, rom->data, rom->romsize);
-    if (rc != rom->romsize) {
-        fprintf(stderr, "rom: file %-20s: read error: rc=%d (expected %zd)\n",
-                rom->name, rc, rom->romsize);
-        goto err;
-    }
-    close(fd);
+
+    rom->romsize = file_load(rom->path, &rom->data);
     rom_insert(rom);
     if (rom->fw_file && fw_cfg) {
         const char *basename;
@@ -621,15 +635,6 @@ int rom_add_file(const char *file, const char *fw_dir,
 
     add_boot_device_path(bootindex, NULL, devpath);
     return 0;
-
-err:
-    if (fd != -1)
-        close(fd);
-    g_free(rom->data);
-    g_free(rom->path);
-    g_free(rom->name);
-    g_free(rom);
-    return -1;
 }
 
 int rom_add_blob(const char *name, const void *blob, size_t len,
-- 
1.7.1


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