On 10/17/14 13:01, Christoph Hellwig wrote:
On Tue, Oct 07, 2014 at 03:07:17PM +0200, Bart Van Assche wrote:
+ /*
+ * Avoid that the SCSI error handler tries to use this channel after
+ * it has been freed. The SCSI error handler can namely continue
+ * trying to perform recovery actions after scsi_remove_host()
+ * returned.
+ */
+ ch->target = NULL;
Do you have a reproducer for that? I think we should fix the root
cause.
Hello Christoph,
The above assignment statement has been reported to fix a kernel oops
that could be triggered by cable pulling. Regarding fixing the root
cause: some time ago I had posted a patch series that makes
scsi_remove_host() wait until all error handler callback functions have
finished and also that prevents that any new error handler function
calls are initiated after scsi_remove_host() has finished
(http://thread.gmane.org/gmane.linux.scsi/82572/focus=87985). Should I
repost that patch series ?
Bart.
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