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mmc_block: check card state after write

Some cards have been reported to signal that they're ready prematurely.
Checking both the busy bit and card state solves the issue.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Pierre Ossman 18 лет назад
Родитель
Сommit
d198f10198
1 измененных файлов с 7 добавлено и 1 удалено
  1. 7 1
      drivers/mmc/card/block.c

+ 7 - 1
drivers/mmc/card/block.c

@@ -321,7 +321,13 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
 					       req->rq_disk->disk_name, err);
 					goto cmd_err;
 				}
-			} while (!(cmd.resp[0] & R1_READY_FOR_DATA));
+				/*
+				 * Some cards mishandle the status bits,
+				 * so make sure to check both the busy
+				 * indication and the card state.
+				 */
+			} while (!(cmd.resp[0] & R1_READY_FOR_DATA) ||
+				(R1_CURRENT_STATE(cmd.resp[0]) == 7));
 
 #if 0
 			if (cmd.resp[0] & ~0x00000900)