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authorMika Westerberg <mika.westerberg@linux.intel.com>2019-10-04 13:00:25 +0300
committerJens Axboe <axboe@kernel.dk>2019-10-06 09:11:37 -0600
commit0e48f51cbbfbdb79149806de14dcb8bf0f01ca94 (patch)
tree61ddfe90317118824b15ae7cff539cb8f8232b62 /drivers
parenta2b90f11217790ec0964ba9c93a4abb369758c26 (diff)
download96b-common-0e48f51cbbfbdb79149806de14dcb8bf0f01ca94.tar.gz
Revert "libata, freezer: avoid block device removal while system is frozen"
This reverts commit 85fbd722ad0f5d64d1ad15888cd1eb2188bfb557. The commit was added as a quick band-aid for a hang that happened when a block device was removed during system suspend. Now that bdi_wq is not freezable anymore the hang should not be possible and we can get rid of this hack by reverting it. Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/ata/libata-scsi.c21
1 files changed, 0 insertions, 21 deletions
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 76d0f9de767b..58e09ffe8b9c 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -4791,27 +4791,6 @@ 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);