atapi: Account for failed and invalid operations in cd_read_sector()

Commit 5f81724 made PIO read requests async but didn't add the
relevant block_acct_failed() and block_acct_invalid() calls.

Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Message-id: 9b87e09d61019c128139b6c999ed0c07f0674170.1448367341.git.berto@igalia.com
Signed-off-by: John Snow <jsnow@redhat.com>

hw/ide/atapi.c

@@ -148,17 +148,18 @@ static void cd_read_sector_cb(void *opaque, int ret)
 {
     IDEState *s = opaque;
 
-    block_acct_done(blk_get_stats(s->blk), &s->acct);
-
 #ifdef DEBUG_IDE_ATAPI
     printf("cd_read_sector_cb: lba=%d ret=%d\n", s->lba, ret);
 #endif
 
     if (ret < 0) {
+        block_acct_failed(blk_get_stats(s->blk), &s->acct);
         ide_atapi_io_error(s, ret);
         return;
     }
 
+    block_acct_done(blk_get_stats(s->blk), &s->acct);
+
     if (s->cd_sector_size == 2352) {
         cd_data_to_raw(s->io_buffer, s->lba);
     }
@@ -173,6 +174,7 @@ static void cd_read_sector_cb(void *opaque, int ret)
 static int cd_read_sector(IDEState *s)
 {
     if (s->cd_sector_size != 2048 && s->cd_sector_size != 2352) {
+        block_acct_invalid(blk_get_stats(s->blk), BLOCK_ACCT_READ);
         return -EINVAL;
     }