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author | David S. Miller <davem@davemloft.net> | 2014-01-07 02:37:45 +0400 |
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committer | David S. Miller <davem@davemloft.net> | 2014-01-07 02:37:45 +0400 |
commit | 56a4342dfe3145cd66f766adccb28fd9b571606d (patch) | |
tree | d1593764488ff8cbb0b83cb9ae35fd968bf81760 /drivers/ata/libata-scsi.c | |
parent | 805c1f4aedaba1bc8d839e7c27b128083dd5c2f0 (diff) | |
parent | fe0d692bbc645786bce1a98439e548ae619269f5 (diff) | |
download | linux-56a4342dfe3145cd66f766adccb28fd9b571606d.tar.xz |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_pf.c
net/ipv6/ip6_tunnel.c
net/ipv6/ip6_vti.c
ipv6 tunnel statistic bug fixes conflicting with consolidation into
generic sw per-cpu net stats.
qlogic conflict between queue counting bug fix and the addition
of multiple MAC address support.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/ata/libata-scsi.c')
-rw-r--r-- | drivers/ata/libata-scsi.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index ab58556d347c..377eb889f555 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -3872,6 +3872,27 @@ void ata_scsi_hotplug(struct work_struct *work) return; } + /* + * XXX - UGLY HACK + * + * The block layer suspend/resume path is fundamentally broken due + * to freezable kthreads and workqueue and may deadlock if a block + * device gets removed while resume is in progress. I don't know + * what the solution is short of removing freezable kthreads and + * workqueues altogether. + * + * The following is an ugly hack to avoid kicking off device + * removal while freezer is active. This is a joke but does avoid + * this particular deadlock scenario. + * + * https://bugzilla.kernel.org/show_bug.cgi?id=62801 + * http://marc.info/?l=linux-kernel&m=138695698516487 + */ +#ifdef CONFIG_FREEZER + while (pm_freezing) + msleep(10); +#endif + DPRINTK("ENTER\n"); mutex_lock(&ap->scsi_scan_mutex); |