From: Ariel Nahum <arieln@mellanox.com>
Date: Thu, 3 Sep 2015 16:49:55 +0000 (+0300)
Subject: libiscsi: Fix iscsi_check_transport_timeouts possible infinite loop
X-Git-Tag: omap-for-v4.3/fixes-rc5~9^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=52f5664a87474894e7da44f3b778dbe4e4c740b7;p=pandora-kernel.git

libiscsi: Fix iscsi_check_transport_timeouts possible infinite loop

Connection last_ping is not being updated when iscsi_send_nopout fails.
Not updating the last_ping will cause firing a timer to a past time
(last_ping + ping_tmo < current_time) which triggers an infinite loop of
iscsi_check_transport_timeouts() and hogs the cpu.

Fix this issue by checking the return value of iscsi_send_nopout.
If it fails set the next_timeout to one second later.

Signed-off-by: Ariel Nahum <arieln@mellanox.com>
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
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