ide-test: check return of fwrite

To quiet patchew, add an assert for fwrite's return value.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
Reviewed-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

tests/ide-test.c

@@ -796,11 +796,13 @@ static void cdrom_pio_impl(int nblocks)
     int i, j;
     uint8_t data;
     uint16_t limit;
+    size_t ret;
 
     /* Prepopulate the CDROM with an interesting pattern */
     generate_pattern(pattern, patt_len, ATAPI_BLOCK_SIZE);
     fh = fopen(tmp_path, "w+");
-    fwrite(pattern, ATAPI_BLOCK_SIZE, patt_blocks, fh);
+    ret = fwrite(pattern, ATAPI_BLOCK_SIZE, patt_blocks, fh);
+    g_assert_cmpint(ret, ==, patt_blocks);
     fclose(fh);
 
     ide_test_start("-drive if=none,file=%s,media=cdrom,format=raw,id=sr0,index=0 "
@@ -880,6 +882,7 @@ static void test_cdrom_pio_large(void)
 static void test_cdrom_dma(void)
 {
     static const size_t len = ATAPI_BLOCK_SIZE;
+    size_t ret;
     char *pattern = g_malloc(ATAPI_BLOCK_SIZE * 16);
     char *rx = g_malloc0(len);
     uintptr_t guest_buf;
@@ -896,7 +899,8 @@ static void test_cdrom_dma(void)
 
     generate_pattern(pattern, ATAPI_BLOCK_SIZE * 16, ATAPI_BLOCK_SIZE);
     fh = fopen(tmp_path, "w+");
-    fwrite(pattern, ATAPI_BLOCK_SIZE, 16, fh);
+    ret = fwrite(pattern, ATAPI_BLOCK_SIZE, 16, fh);
+    g_assert_cmpint(ret, ==, 16);
     fclose(fh);
 
     send_dma_request(CMD_PACKET, 0, 1, prdt, 1, send_scsi_cdb_read10);