ata_port_detach() calls ata_dev_disable() with host lock held but
ata_dev_disable() should be called from EH context. ata_port_detach()
steals EH context by setting ATA_PFLAG_UNLOADAING and flushing EH.
Drop locking around ata_dev_disable() and note that ata_port_detach()
owns EH context at that point.
Signed-off-by: Tejun Heo <htejun@xxxxxxxxx>
---
drivers/ata/libata-core.c | 8 ++------
1 files changed, 2 insertions(+), 6 deletions(-)
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index e4dea86..a8131e5 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -7208,18 +7208,14 @@ static void ata_port_detach(struct ata_port *ap)
ata_port_wait_eh(ap);
- /* EH is now guaranteed to see UNLOADING, so no new device
- * will be attached. Disable all existing devices.
+ /* EH is now guaranteed to see UNLOADING - EH context belongs
+ * to us. Disable all existing devices.
*/
- spin_lock_irqsave(ap->lock, flags);
-
ata_port_for_each_link(link, ap) {
ata_link_for_each_dev(dev, link)
ata_dev_disable(dev);
}
- spin_unlock_irqrestore(ap->lock, flags);
-
/* Final freeze & EH. All in-flight commands are aborted. EH
* will be skipped and retrials will be terminated with bad
* target.
--
1.5.2.4
-
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