Files
android_kernel_xiaomi_sm8450/include/linux
Bart Van Assche ccce20fc79 scsi: sd_zbc: Avoid that resetting a zone fails sporadically
Since SCSI scanning occurs asynchronously, since sd_revalidate_disk() is
called from sd_probe_async() and since sd_revalidate_disk() calls
sd_zbc_read_zones() it can happen that sd_zbc_read_zones() is called
concurrently with blkdev_report_zones() and/or blkdev_reset_zones().  That can
cause these functions to fail with -EIO because sd_zbc_read_zones() e.g. sets
q->nr_zones to zero before restoring it to the actual value, even if no drive
characteristics have changed.  Avoid that this can happen by making the
following changes:

- Protect the code that updates zone information with blk_queue_enter()
  and blk_queue_exit().
- Modify sd_zbc_setup_seq_zones_bitmap() and sd_zbc_setup() such that
  these functions do not modify struct scsi_disk before all zone
  information has been obtained.

Note: since commit 055f6e18e0 ("block: Make q_usage_counter also track
legacy requests"; kernel v4.15) the request queue freezing mechanism also
affects legacy request queues.

Fixes: 89d9475610 ("sd: Implement support for ZBC devices")
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Damien Le Moal <damien.lemoal@wdc.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.com>
Cc: stable@vger.kernel.org # v4.16
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2018-04-19 00:04:10 -04:00
..
2018-02-14 09:43:22 -08:00
2017-11-28 16:30:38 +01:00
2018-01-01 22:54:42 -08:00
2018-02-20 11:34:54 +00:00
2018-03-08 13:56:24 +05:30
2018-03-29 14:29:55 -04:00
2018-04-11 10:28:37 -07:00
2018-04-10 08:38:46 -06:00
2018-03-16 10:56:13 +01:00
2018-03-31 02:15:18 +02:00
2018-03-31 02:16:26 +02:00
2018-03-31 02:14:44 +02:00
2017-11-15 18:21:04 -08:00
2018-03-16 15:45:51 -07:00
2018-01-03 14:03:48 +01:00
2018-03-16 10:55:47 +01:00
2018-03-26 15:09:38 +02:00
2017-11-27 16:19:56 -05:00
2018-03-12 10:05:01 +01:00
2018-01-01 12:40:27 -07:00
2018-03-26 15:56:44 +02:00
2018-03-31 02:15:18 +02:00
2017-11-13 01:41:20 +01:00
2018-02-26 09:48:42 -07:00
2017-11-15 18:21:06 -08:00
2018-02-22 21:13:03 +01:00
2018-03-26 08:53:43 -06:00
2018-01-17 11:30:16 +00:00
2018-04-11 10:28:35 -07:00
2018-04-11 10:28:38 -07:00
2017-11-15 18:21:01 -08:00
2018-02-24 01:43:47 +01:00
2018-03-13 13:29:10 -07:00
2017-12-01 13:09:40 -08:00
2018-04-12 09:41:19 -07:00
2018-01-03 11:00:22 -05:00
2018-04-11 10:28:32 -07:00
2018-04-11 10:28:39 -07:00
2018-03-26 13:14:43 -04:00
2018-03-26 13:14:43 -04:00
2018-03-26 13:14:43 -04:00
2018-03-30 12:56:22 -04:00
2017-11-17 16:10:00 -08:00
2018-01-28 22:17:24 -05:00
2018-01-08 08:22:45 -06:00
2018-01-17 15:25:50 +01:00
2018-01-08 08:22:45 -06:00
2017-12-14 16:00:49 -08:00
2018-04-11 10:28:39 -07:00
2018-01-31 17:18:37 -08:00
2017-11-09 10:23:28 +01:00
2018-01-19 16:50:53 -08:00
2017-11-17 16:10:04 -08:00
2017-11-17 16:10:04 -08:00
2017-11-13 01:33:48 +01:00
2017-12-16 02:05:48 +01:00
2018-02-20 16:12:26 -08:00
2017-12-11 14:37:11 -07:00
2018-03-17 14:20:55 +01:00
2018-03-01 08:33:05 -07:00
2017-11-07 12:22:21 +01:00
2018-01-29 12:02:54 -05:00
2018-04-05 21:36:24 -07:00
2018-04-05 21:36:27 -07:00
2018-01-18 11:56:49 +01:00
2018-01-15 12:07:46 -08:00
2018-02-06 18:32:47 -08:00
2018-01-09 16:27:43 +01:00
2018-02-20 16:10:25 -08:00
2018-02-06 18:32:44 -08:00
2017-12-20 09:53:54 -07:00