A simply continueous background I/O could 100% make the system stuck for
a long time in my system when a unbind for the controller driver happens
simultaneously. See:
dd if=/dev/mmcblk0 of=/dev/null bs=512k count=100000 &&
echo fe320000.dwmmc > /sys/bus/platform/drivers/dwmmc_rockchip/unbind
The reason is all pending requests wait for timeout one by one, but never
propagates BLK_STS_IOERR in the first place when kicked from the queue.
Set the card as removed immediately in mmc_remove_card() to solve it.
Signed-off-by: Shawn Lin <shawn.lin@xxxxxxxxxxxxxx>
---
drivers/mmc/core/bus.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
index fc92c6c..c6c5dfe 100644
--- a/drivers/mmc/core/bus.c
+++ b/drivers/mmc/core/bus.c
@@ -389,6 +389,7 @@ void mmc_remove_card(struct mmc_card *card)
pr_info("%s: card %04x removed\n",
mmc_hostname(card->host), card->rca);
}
+ mmc_card_set_removed(card);
device_del(&card->dev);
of_node_put(card->dev.of_node);
}
--
1.9.1
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