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authorRosen Penev <rosenp@gmail.com>2020-08-13 21:31:37 -0700
committerTobias Klauser <tobias.klauser@gmail.com>2020-08-14 11:01:43 +0200
commit3be4f21f8fbdb1f2524a2829b0cb7ce9ba94e91d (patch)
treef6070ef07010ec75c14c637ddda4e12aeaa86ef8 /dissector_sll.c
parent6c52fa8069925ae6ea6d7b4e66d848073ac2aef8 (diff)
cookie: add sys/types header
Needed for ssize_t under uClibc-ng.
Diffstat (limited to 'dissector_sll.c')
0 files changed, 0 insertions, 0 deletions
y?id=efd1535270c1deb0487527bf0c3c827301a69c93&id2=116f7d4a21fe450efc652c4850eb27cda36c9db0'>diff)
xen-blkfront: don't call talk_to_blkback when already connected to blkback
Sometimes blkfront may twice receive blkback_changed() notification (XenbusStateConnected) after migration, which will cause talk_to_blkback() to be called twice too and confuse xen-blkback. The flow is as follow: blkfront blkback blkfront_resume() > talk_to_blkback() > Set blkfront to XenbusStateInitialised front changed() > Connect() > Set blkback to XenbusStateConnected blkback_changed() > Skip talk_to_blkback() because frontstate == XenbusStateInitialised > blkfront_connect() > Set blkfront to XenbusStateConnected ----- And here we get another XenbusStateConnected notification leading to: ----- blkback_changed() > because now frontstate != XenbusStateInitialised talk_to_blkback() is also called again > blkfront state changed from XenbusStateConnected to XenbusStateInitialised (Which is not correct!) front_changed(): > Do nothing because blkback already in XenbusStateConnected Now blkback is in XenbusStateConnected but blkfront is still in XenbusStateInitialised - leading to no disks. Poking of the XenbusStateConnected state is allowed (to deal with block disk change) and has to be dealt with. The most likely cause of this bug are custom udev scripts hooking up the disks and then validating the size. Signed-off-by: Bob Liu <bob.liu@oracle.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'Documentation/devicetree/bindings/phy')