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-rw-r--r--block/blk-iocost.c14
-rw-r--r--block/genhd.c15
-rw-r--r--block/ioctl.c5
-rw-r--r--block/partitions/core.c5
4 files changed, 23 insertions, 16 deletions
diff --git a/block/blk-iocost.c b/block/blk-iocost.c
index 04d44f0bcb..f3b68b7994 100644
--- a/block/blk-iocost.c
+++ b/block/blk-iocost.c
@@ -1347,7 +1347,7 @@ static bool iocg_kick_delay(struct ioc_gq *iocg, struct ioc_now *now)
{
struct ioc *ioc = iocg->ioc;
struct blkcg_gq *blkg = iocg_to_blkg(iocg);
- u64 tdelta, delay, new_delay;
+ u64 tdelta, delay, new_delay, shift;
s64 vover, vover_pct;
u32 hwa;
@@ -1362,8 +1362,9 @@ static bool iocg_kick_delay(struct ioc_gq *iocg, struct ioc_now *now)
/* calculate the current delay in effect - 1/2 every second */
tdelta = now->now - iocg->delay_at;
- if (iocg->delay)
- delay = iocg->delay >> div64_u64(tdelta, USEC_PER_SEC);
+ shift = div64_u64(tdelta, USEC_PER_SEC);
+ if (iocg->delay && shift < BITS_PER_LONG)
+ delay = iocg->delay >> shift;
else
delay = 0;
@@ -1438,8 +1439,11 @@ static void iocg_pay_debt(struct ioc_gq *iocg, u64 abs_vpay,
lockdep_assert_held(&iocg->ioc->lock);
lockdep_assert_held(&iocg->waitq.lock);
- /* make sure that nobody messed with @iocg */
- WARN_ON_ONCE(list_empty(&iocg->active_list));
+ /*
+ * make sure that nobody messed with @iocg. Check iocg->pd.online
+ * to avoid warn when removing blkcg or disk.
+ */
+ WARN_ON_ONCE(list_empty(&iocg->active_list) && iocg->pd.online);
WARN_ON_ONCE(iocg->inuse > 1);
iocg->abs_vdebt -= min(abs_vpay, iocg->abs_vdebt);
diff --git a/block/genhd.c b/block/genhd.c
index d74fb5b4ae..d0471f469f 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -345,9 +345,7 @@ int disk_scan_partitions(struct gendisk *disk, blk_mode_t mode)
struct bdev_handle *handle;
int ret = 0;
- if (disk->flags & (GENHD_FL_NO_PART | GENHD_FL_HIDDEN))
- return -EINVAL;
- if (test_bit(GD_SUPPRESS_PART_SCAN, &disk->state))
+ if (!disk_has_partscan(disk))
return -EINVAL;
if (disk->open_partitions)
return -EBUSY;
@@ -503,8 +501,7 @@ int __must_check device_add_disk(struct device *parent, struct gendisk *disk,
goto out_unregister_bdi;
/* Make sure the first partition scan will be proceed */
- if (get_capacity(disk) && !(disk->flags & GENHD_FL_NO_PART) &&
- !test_bit(GD_SUPPRESS_PART_SCAN, &disk->state))
+ if (get_capacity(disk) && disk_has_partscan(disk))
set_bit(GD_NEED_PART_SCAN, &disk->state);
bdev_add(disk->part0, ddev->devt);
@@ -1047,6 +1044,12 @@ static ssize_t diskseq_show(struct device *dev,
return sprintf(buf, "%llu\n", disk->diskseq);
}
+static ssize_t partscan_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%u\n", disk_has_partscan(dev_to_disk(dev)));
+}
+
static DEVICE_ATTR(range, 0444, disk_range_show, NULL);
static DEVICE_ATTR(ext_range, 0444, disk_ext_range_show, NULL);
static DEVICE_ATTR(removable, 0444, disk_removable_show, NULL);
@@ -1060,6 +1063,7 @@ static DEVICE_ATTR(stat, 0444, part_stat_show, NULL);
static DEVICE_ATTR(inflight, 0444, part_inflight_show, NULL);
static DEVICE_ATTR(badblocks, 0644, disk_badblocks_show, disk_badblocks_store);
static DEVICE_ATTR(diskseq, 0444, diskseq_show, NULL);
+static DEVICE_ATTR(partscan, 0444, partscan_show, NULL);
#ifdef CONFIG_FAIL_MAKE_REQUEST
ssize_t part_fail_show(struct device *dev,
@@ -1106,6 +1110,7 @@ static struct attribute *disk_attrs[] = {
&dev_attr_events_async.attr,
&dev_attr_events_poll_msecs.attr,
&dev_attr_diskseq.attr,
+ &dev_attr_partscan.attr,
#ifdef CONFIG_FAIL_MAKE_REQUEST
&dev_attr_fail.attr,
#endif
diff --git a/block/ioctl.c b/block/ioctl.c
index 5f8c988239..7dbed0c115 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -89,7 +89,7 @@ static int blk_ioctl_discard(struct block_device *bdev, blk_mode_t mode,
unsigned long arg)
{
uint64_t range[2];
- uint64_t start, len;
+ uint64_t start, len, end;
struct inode *inode = bdev->bd_inode;
int err;
@@ -110,7 +110,8 @@ static int blk_ioctl_discard(struct block_device *bdev, blk_mode_t mode,
if (len & 511)
return -EINVAL;
- if (start + len > bdev_nr_bytes(bdev))
+ if (check_add_overflow(start, len, &end) ||
+ end > bdev_nr_bytes(bdev))
return -EINVAL;
filemap_invalidate_lock(inode->i_mapping);
diff --git a/block/partitions/core.c b/block/partitions/core.c
index 5f5ed5c75f..eac887755f 100644
--- a/block/partitions/core.c
+++ b/block/partitions/core.c
@@ -584,10 +584,7 @@ static int blk_add_partitions(struct gendisk *disk)
struct parsed_partitions *state;
int ret = -EAGAIN, p;
- if (disk->flags & GENHD_FL_NO_PART)
- return 0;
-
- if (test_bit(GD_SUPPRESS_PART_SCAN, &disk->state))
+ if (!disk_has_partscan(disk))
return 0;
state = check_partition(disk);