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[PATCH kernel-4.19 1/2] blk-wbt: introduce a new disable state to prevent false positive by rwb_enabled()
by Yang Yingliang 19 Jun '21

19 Jun '21

From: Zhang Yi <yi.zhang(a)huawei.com> hulk inclusion category: bugfix bugzilla: 109296 CVE: NA --------------------------- Now that we disable wbt by simply zero out rwb->wb_normal in wbt_disable_default() when switch elevator to bfq, but it's not safe because it will become false positive if we change queue depth. If it become false positive between wbt_wait() and wbt_track() when submit write request, it will lead to drop rqw->inflight to -1 in wbt_done(), which will end up trigger IO hung. Fix this issue by introduce a new state which mean the wbt was disabled. Fixes: a79050434b45 ("blk-rq-qos: refactor out common elements of blk-wbt") Signed-off-by: Zhang Yi <yi.zhang(a)huawei.com> Reviewed-by: Yang Erkun <yangerkun(a)huawei.com> Reviewed-by: Jason Yan <yanaijie(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- block/blk-wbt.c | 5 +++-- block/blk-wbt.h | 1 + 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/block/blk-wbt.c b/block/blk-wbt.c index 2217ba732b7b9..cf0dfec2e0602 100644 --- a/block/blk-wbt.c +++ b/block/blk-wbt.c @@ -76,7 +76,8 @@ enum { static inline bool rwb_enabled(struct rq_wb *rwb) { - return rwb && rwb->wb_normal != 0; + return rwb && rwb->enable_state != WBT_STATE_OFF_DEFAULT && + rwb->wb_normal != 0; } static void wb_timestamp(struct rq_wb *rwb, unsigned long *var) @@ -766,7 +767,7 @@ void wbt_disable_default(struct request_queue *q) rwb = RQWB(rqos); if (rwb->enable_state == WBT_STATE_ON_DEFAULT) { blk_stat_deactivate(rwb->cb); - rwb->wb_normal = 0; + rwb->enable_state = WBT_STATE_OFF_DEFAULT; } } EXPORT_SYMBOL_GPL(wbt_disable_default); diff --git a/block/blk-wbt.h b/block/blk-wbt.h index 8e4e376609710..d8d9f41b42f9a 100644 --- a/block/blk-wbt.h +++ b/block/blk-wbt.h @@ -34,6 +34,7 @@ enum { enum { WBT_STATE_ON_DEFAULT = 1, WBT_STATE_ON_MANUAL = 2, + WBT_STATE_OFF_DEFAULT }; struct rq_wb { -- 2.25.1

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[PATCH openEuler-1.0-LTS] ext4: stop return ENOSPC from ext4_issue_zeroout
by Yang Yingliang 19 Jun '21

19 Jun '21

From: yangerkun <yangerkun(a)huawei.com> hulk inclusion category: bugfix bugzilla: 109297 CVE: NA --------------------------- Our testcase(briefly described as fsstress on dm thin-provisioning which ext4 see volume size with 100G but actual size 10G) trigger a hungtask bug since ext4_writepages fall into a infinite loop: static int ext4_writepages(xxx) { ... while (!done && mpd.first_page <= mpd.last_page) { ... ret = mpage_prepare_extent_to_map(&mpd); if (!ret) { ... ret = mpage_map_and_submit_extent(handle, &mpd,&give_up_on_write); <----- will return -ENOSPC ... } ... if (ret == -ENOSPC && sbi->s_journal) { <------ we cannot break since we will get ENOSPC forever jbd2_journal_force_commit_nested(sbi->s_journal); ret = 0; continue; } ... } } Got ENOSPC with follow stack: ... ext4_ext_map_blocks ext4_ext_convert_to_initialized ext4_ext_zeroout ext4_issue_zeroout ... submit_bio_wait <-- bio to thinpool will return ENOSPC Actually the ENOSPC from thin-provisioning means that a EIO from block device. We need convert the err as EIO to stop confuse ext4. Signed-off-by: yangerkun <yangerkun(a)huawei.com> Reviewed-by: Zhang Yi <yi.zhang(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- fs/ext4/inode.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 6b6b94ebbcb85..b809d383cc5ae 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -427,6 +427,9 @@ int ext4_issue_zeroout(struct inode *inode, ext4_lblk_t lblk, ext4_fsblk_t pblk, if (ret > 0) ret = 0; + if (ret == -ENOSPC) + ret = -EIO; + return ret; } -- 2.25.1

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[PATCH kernel-4.19] dm btree remove: assign new_root only when removal succeeds
by Yang Yingliang 19 Jun '21

19 Jun '21

From: Hou Tao <houtao1(a)huawei.com> hulk inclusion category: bugfix bugzilla: 55081 CVE: NA --------------------------- remove_raw() in dm_btree_remove() may fail due to IO read error (e.g. read the content of origin block fails during shadowing), and the value of shadow_spine::root is uninitialized, but the uninitialized value is still assign to new_root in the end of dm_btree_remove(). For dm-thin, the value of pmd->details_root or pmd->root will become an uninitialized value, so if trying to read details_info tree again out-of-bound memory may occur as showed below: general protection fault, probably for non-canonical address 0x3fdcb14c8d7520 CPU: 4 PID: 515 Comm: dmsetup Not tainted 5.13.0-rc6 Hardware name: QEMU Standard PC RIP: 0010:metadata_ll_load_ie+0x14/0x30 Call Trace: sm_metadata_count_is_more_than_one+0xb9/0xe0 dm_tm_shadow_block+0x52/0x1c0 shadow_step+0x59/0xf0 remove_raw+0xb2/0x170 dm_btree_remove+0xf4/0x1c0 dm_pool_delete_thin_device+0xc3/0x140 pool_message+0x218/0x2b0 target_message+0x251/0x290 ctl_ioctl+0x1c4/0x4d0 dm_ctl_ioctl+0xe/0x20 __x64_sys_ioctl+0x7b/0xb0 do_syscall_64+0x40/0xb0 entry_SYSCALL_64_after_hwframe+0x44/0xae Fixing it by only assign new_root when removal succeeds Signed-off-by: Hou Tao <houtao1(a)huawei.com> Link: https://patchwork.kernel.org/project/dm-devel/patch/20210617074547.64255-1-… Signed-off-by: Luo Meng <luomeng12(a)huawei.com> Reviewed-by: Zhang Xiaoxu <zhangxiaoxu5(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- drivers/md/persistent-data/dm-btree-remove.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/md/persistent-data/dm-btree-remove.c b/drivers/md/persistent-data/dm-btree-remove.c index eff04fa23dfad..9e4d1212f4c16 100644 --- a/drivers/md/persistent-data/dm-btree-remove.c +++ b/drivers/md/persistent-data/dm-btree-remove.c @@ -549,7 +549,8 @@ int dm_btree_remove(struct dm_btree_info *info, dm_block_t root, delete_at(n, index); } - *new_root = shadow_root(&spine); + if (!r) + *new_root = shadow_root(&spine); exit_shadow_spine(&spine); return r; -- 2.25.1

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[PATCH kernel-4.19 1/2] scsi: remove unused kobj map for sd devie to avoid memleak
by Yang Yingliang 19 Jun '21

19 Jun '21

From: Yufen Yu <yuyufen(a)huawei.com> hulk inclusion category: bugfix bugzilla: 109288 CVE: NA ------------------------------------------------- After calling add_disk, we have register new kobj map for sd device, then we can remove old unused kobj map which probed by sd_remove. Signed-off-by: Yufen Yu <yuyufen(a)huawei.com> Reviewed-by: Hou Tao <houtao1(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- block/genhd.c | 8 ++++++++ drivers/base/map.c | 28 ++++++++++++++++++++++++++++ drivers/scsi/sd.c | 1 + include/linux/genhd.h | 2 ++ include/linux/kobj_map.h | 2 ++ 5 files changed, 41 insertions(+) diff --git a/block/genhd.c b/block/genhd.c index 408cda8af4eba..be938088c440f 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -570,6 +570,14 @@ void blk_unregister_region(dev_t devt, unsigned long range) EXPORT_SYMBOL(blk_unregister_region); +void blk_delete_region(dev_t devt, unsigned long range, + struct kobject *(*probe)(dev_t, int *, void *)) +{ + kobj_delete(bdev_map, devt, range, probe); +} + +EXPORT_SYMBOL(blk_delete_region); + static struct kobject *exact_match(dev_t devt, int *partno, void *data) { struct gendisk *p = data; diff --git a/drivers/base/map.c b/drivers/base/map.c index 5650ab2b247ad..551296d485020 100644 --- a/drivers/base/map.c +++ b/drivers/base/map.c @@ -92,6 +92,34 @@ void kobj_unmap(struct kobj_map *domain, dev_t dev, unsigned long range) kfree(found); } +void kobj_delete(struct kobj_map *domain, dev_t dev, unsigned long range, + kobj_probe_t *probe) +{ + unsigned n = MAJOR(dev + range - 1) - MAJOR(dev) + 1; + unsigned index = MAJOR(dev); + unsigned i; + struct probe *found = NULL; + + if (n > 255) + n = 255; + + mutex_lock(domain->lock); + for (i = 0; i < n; i++, index++) { + struct probe **s; + for (s = &domain->probes[index % 255]; *s; s = &(*s)->next) { + struct probe *p = *s; + if (p->dev == dev && p->range == range && p->get == probe) { + *s = p->next; + if (!found) + found = p; + break; + } + } + } + mutex_unlock(domain->lock); + kfree(found); +} + struct kobject *kobj_lookup(struct kobj_map *domain, dev_t dev, int *index) { struct kobject *kobj; diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index d466d5a4b3129..5fa02f8261cba 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -3354,6 +3354,7 @@ static void sd_probe_async(void *data, async_cookie_t cookie) blk_pm_runtime_init(sdp->request_queue, dev); device_add_disk(dev, gd, NULL); + blk_delete_region(disk_devt(sdkp->disk), SD_MINORS, sd_default_probe); if (sdkp->capacity) sd_dif_config_host(sdkp); diff --git a/include/linux/genhd.h b/include/linux/genhd.h index bf8523db1f4dd..0c0b9dd50f76e 100644 --- a/include/linux/genhd.h +++ b/include/linux/genhd.h @@ -649,6 +649,8 @@ extern void blk_register_region(dev_t devt, unsigned long range, int (*lock)(dev_t, void *), void *data); extern void blk_unregister_region(dev_t devt, unsigned long range); +extern void blk_delete_region(dev_t devt, unsigned long range, + struct kobject *(*probe)(dev_t, int *, void *)); extern ssize_t part_size_show(struct device *dev, struct device_attribute *attr, char *buf); diff --git a/include/linux/kobj_map.h b/include/linux/kobj_map.h index c9919f8b22932..73361fe1c43ac 100644 --- a/include/linux/kobj_map.h +++ b/include/linux/kobj_map.h @@ -14,6 +14,8 @@ struct kobj_map; int kobj_map(struct kobj_map *, dev_t, unsigned long, struct module *, kobj_probe_t *, int (*)(dev_t, void *), void *); void kobj_unmap(struct kobj_map *, dev_t, unsigned long); +void kobj_delete(struct kobj_map *, dev_t, unsigned long, + kobj_probe_t *); struct kobject *kobj_lookup(struct kobj_map *, dev_t, int *); struct kobj_map *kobj_map_init(kobj_probe_t *, struct mutex *); -- 2.25.1

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[PATCH openEuler-1.0-LTS 1/2] scsi: remove unused kobj map for sd devie to avoid memleak
by Yang Yingliang 19 Jun '21

19 Jun '21

From: Yufen Yu <yuyufen(a)huawei.com> hulk inclusion category: bugfix bugzilla: 109288 CVE: NA ------------------------------------------------- After calling add_disk, we have register new kobj map for sd device, then we can remove old unused kobj map which probed by sd_remove. Signed-off-by: Yufen Yu <yuyufen(a)huawei.com> Reviewed-by: Hou Tao <houtao1(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- block/genhd.c | 8 ++++++++ drivers/base/map.c | 28 ++++++++++++++++++++++++++++ drivers/scsi/sd.c | 1 + include/linux/genhd.h | 2 ++ include/linux/kobj_map.h | 2 ++ 5 files changed, 41 insertions(+) diff --git a/block/genhd.c b/block/genhd.c index f66726a4fad27..b5820cf94b5d2 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -570,6 +570,14 @@ void blk_unregister_region(dev_t devt, unsigned long range) EXPORT_SYMBOL(blk_unregister_region); +void blk_delete_region(dev_t devt, unsigned long range, + struct kobject *(*probe)(dev_t, int *, void *)) +{ + kobj_delete(bdev_map, devt, range, probe); +} + +EXPORT_SYMBOL(blk_delete_region); + static struct kobject *exact_match(dev_t devt, int *partno, void *data) { struct gendisk *p = data; diff --git a/drivers/base/map.c b/drivers/base/map.c index 5650ab2b247ad..551296d485020 100644 --- a/drivers/base/map.c +++ b/drivers/base/map.c @@ -92,6 +92,34 @@ void kobj_unmap(struct kobj_map *domain, dev_t dev, unsigned long range) kfree(found); } +void kobj_delete(struct kobj_map *domain, dev_t dev, unsigned long range, + kobj_probe_t *probe) +{ + unsigned n = MAJOR(dev + range - 1) - MAJOR(dev) + 1; + unsigned index = MAJOR(dev); + unsigned i; + struct probe *found = NULL; + + if (n > 255) + n = 255; + + mutex_lock(domain->lock); + for (i = 0; i < n; i++, index++) { + struct probe **s; + for (s = &domain->probes[index % 255]; *s; s = &(*s)->next) { + struct probe *p = *s; + if (p->dev == dev && p->range == range && p->get == probe) { + *s = p->next; + if (!found) + found = p; + break; + } + } + } + mutex_unlock(domain->lock); + kfree(found); +} + struct kobject *kobj_lookup(struct kobj_map *domain, dev_t dev, int *index) { struct kobject *kobj; diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index fad7001699248..c419deb2c1acf 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -3354,6 +3354,7 @@ static void sd_probe_async(void *data, async_cookie_t cookie) blk_pm_runtime_init(sdp->request_queue, dev); device_add_disk(dev, gd); + blk_delete_region(disk_devt(sdkp->disk), SD_MINORS, sd_default_probe); if (sdkp->capacity) sd_dif_config_host(sdkp); diff --git a/include/linux/genhd.h b/include/linux/genhd.h index 404567f13cdae..9c398294b6279 100644 --- a/include/linux/genhd.h +++ b/include/linux/genhd.h @@ -650,6 +650,8 @@ extern void blk_register_region(dev_t devt, unsigned long range, int (*lock)(dev_t, void *), void *data); extern void blk_unregister_region(dev_t devt, unsigned long range); +extern void blk_delete_region(dev_t devt, unsigned long range, + struct kobject *(*probe)(dev_t, int *, void *)); extern ssize_t part_size_show(struct device *dev, struct device_attribute *attr, char *buf); diff --git a/include/linux/kobj_map.h b/include/linux/kobj_map.h index c9919f8b22932..73361fe1c43ac 100644 --- a/include/linux/kobj_map.h +++ b/include/linux/kobj_map.h @@ -14,6 +14,8 @@ struct kobj_map; int kobj_map(struct kobj_map *, dev_t, unsigned long, struct module *, kobj_probe_t *, int (*)(dev_t, void *), void *); void kobj_unmap(struct kobj_map *, dev_t, unsigned long); +void kobj_delete(struct kobj_map *, dev_t, unsigned long, + kobj_probe_t *); struct kobject *kobj_lookup(struct kobj_map *, dev_t, int *); struct kobj_map *kobj_map_init(kobj_probe_t *, struct mutex *); -- 2.25.1

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[PATCH openEuler-1.0-LTS 0/4] Avoid conflicting function names during building perf, and change directive for the bison tool
by Hongyu Li 19 Jun '21

19 Jun '21

When compiling the perf tool, it is possible to have get_current_dir_name(), eventfd(), and gettid() provided by the user's development environment. So it is necessary to check whether these functions are available before using them. Meanwhile, bison uses "%define api.pure full" instead of "%pure-parser". This change should also be done in the perf code to compile the perf tool. Arnaldo Carvalho de Melo (3): tools build feature: Check if get_current_dir_name() is available tools build feature: Check if eventfd() is available tools build: Check if gettid() is available before providing helper Jiri Olsa (1): perf tools: Use %define api.pure full instead of %pure-parser tools/build/Makefile.feature | 3 +++ tools/build/feature/Makefile | 12 ++++++++++++ tools/build/feature/test-all.c | 15 +++++++++++++++ tools/build/feature/test-eventfd.c | 9 +++++++++ .../build/feature/test-get_current_dir_name.c | 10 ++++++++++ tools/build/feature/test-gettid.c | 11 +++++++++++ tools/perf/Makefile.config | 12 ++++++++++++ tools/perf/jvmti/jvmti_agent.c | 2 ++ tools/perf/util/Build | 1 + tools/perf/util/expr.y | 3 ++- tools/perf/util/get_current_dir_name.c | 18 ++++++++++++++++++ tools/perf/util/parse-events.y | 2 +- tools/perf/util/util.h | 4 ++++ 13 files changed, 100 insertions(+), 2 deletions(-) create mode 100644 tools/build/feature/test-eventfd.c create mode 100644 tools/build/feature/test-get_current_dir_name.c create mode 100644 tools/build/feature/test-gettid.c create mode 100644 tools/perf/util/get_current_dir_name.c -- 2.17.1

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(no subject)
by ✎﹏ℳMeaow. 19 Jun '21

19 Jun '21

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[PATCH openEuler-21.03] USB: trancevibrator: fix control-request direction
by Argon Pub 18 Jun '21

18 Jun '21

From: Johan Hovold <johan(a)kernel.org> stable inclusion from stable-5.12.9 commit 9bc02a003a70dbbc94709f0829dc32ff82439ede bugzilla: https://bugzilla.openeuler.org/show_bug.cgi?id=77 CVE: NA -------------------------------- commit 746e4acf87bcacf1406e05ef24a0b7139147c63e upstream. The direction of the pipe argument must match the request-type direction bit or control requests may fail depending on the host-controller-driver implementation. Fix the set-speed request which erroneously used USB_DIR_IN and update the default timeout argument to match (same value). Fixes: 5638e4d92e77 ("USB: add PlayStation 2 Trance Vibrator driver") Cc: stable(a)vger.kernel.org # 2.6.19 Signed-off-by: Johan Hovold <johan(a)kernel.org> Link: https://lore.kernel.org/r/20210521133109.17396-1-johan@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Argon Pub <argon(a)4rt.top> --- drivers/usb/misc/trancevibrator.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/usb/misc/trancevibrator.c b/drivers/usb/misc/trancevibrator.c index a3dfc77578ea..26baba3ab7d7 100644 --- a/drivers/usb/misc/trancevibrator.c +++ b/drivers/usb/misc/trancevibrator.c @@ -61,9 +61,9 @@ static ssize_t speed_store(struct device *dev, struct device_attribute *attr, /* Set speed */ retval = usb_control_msg(tv->udev, usb_sndctrlpipe(tv->udev, 0), 0x01, /* vendor request: set speed */ - USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER, + USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER, tv->speed, /* speed value */ - 0, NULL, 0, USB_CTRL_GET_TIMEOUT); + 0, NULL, 0, USB_CTRL_SET_TIMEOUT); if (retval) { tv->speed = old; dev_dbg(&tv->udev->dev, "retval = %d\n", retval); -- 2.23.0

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[PATCH openEuler-21.03] Revert "net/smc: fix a NULL pointer dereference"
by bobo~ 18 Jun '21

18 Jun '21

From: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> stable inclusion from stable-v5.12.9 commit c0fc080bd134744d3766b3b0fa2de29d12922288 bugzilla: https://bugzilla.openeuler.org/show_bug.cgi?id=113 CVE: NA -------------------------------- [ Upstream commit 5369ead83f5aff223b6418c99cb1fe9a8f007363 ] This reverts commit e183d4e414b64711baf7a04e214b61969ca08dfa. Because of recent interactions with developers from @umn.edu, all commits from them have been recently re-reviewed to ensure if they were correct or not. Upon review, this commit was found to be incorrect for the reasons below, so it must be reverted. It will be fixed up "correctly" in a later kernel change. The original commit causes a memory leak and does not properly fix the issue it claims to fix. I will send a follow-on patch to resolve this properly. Cc: Kangjie Lu <kjlu(a)umn.edu> Cc: Ursula Braun <ubraun(a)linux.ibm.com> Cc: David S. Miller <davem(a)davemloft.net> Link: https://lore.kernel.org/r/20210503115736.2104747-17-gregkh@linuxfoundation.… Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: bobo~ <931671772(a)qq.com> --- net/smc/smc_ism.c | 5 ----- 1 file changed, 5 deletions(-) diff --git a/net/smc/smc_ism.c b/net/smc/smc_ism.c index 6abbdd09a580..b4a9fe452470 100644 --- a/net/smc/smc_ism.c +++ b/net/smc/smc_ism.c @@ -319,11 +319,6 @@ struct smcd_dev *smcd_alloc_dev(struct device *parent, const char *name, init_waitqueue_head(&smcd->lgrs_deleted); smcd->event_wq = alloc_ordered_workqueue("ism_evt_wq-%s)", WQ_MEM_RECLAIM, name); - if (!smcd->event_wq) { - kfree(smcd->conn); - kfree(smcd); - return NULL; - } return smcd; } EXPORT_SYMBOL_GPL(smcd_alloc_dev); -- 2.23.0

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[PATCH openEuler-21.03] Revert "char: hpet: fix a missing check of ioremap"
by 26-Tang Minji 18 Jun '21

18 Jun '21

From: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> stable inclusion from stable-5.12.9 commit 740b5323b653ed7acfc40d27c828cc330bbc60b6 bugzilla: https://bugzilla.openeuler.org/show_bug.cgi?id=197 CVE: NA -------------------------------- [ Upstream commit 566f53238da74801b48e985788e5f7c9159e5940 ] This reverts commit 13bd14a41ce3105d5b1f3cd8b4d1e249d17b6d9b. Because of recent interactions with developers from @umn.edu, all commits from them have been recently re-reviewed to ensure if they were correct or not. Upon review, this commit was found to be incorrect for the reasons below, so it must be reverted. It will be fixed up "correctly" in a later kernel change. While this is technically correct, it is only fixing ONE of these errors in this function, so the patch is not fully correct. I'll leave this revert and provide a fix for this later that resolves this same "problem" everywhere in this function. Cc: Kangjie Lu <kjlu(a)umn.edu> Link: https://lore.kernel.org/r/20210503115736.2104747-29-gregkh@linuxfoundation.… Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: 26-Tang Minji <3188960675(a)qq.com> --- drivers/char/hpet.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c index ed3b7dab678d..6f13def6c172 100644 --- a/drivers/char/hpet.c +++ b/drivers/char/hpet.c @@ -969,8 +969,6 @@ static acpi_status hpet_resources(struct acpi_resource *res, void *data) if (ACPI_SUCCESS(status)) { hdp->hd_phys_address = addr.address.minimum; hdp->hd_address = ioremap(addr.address.minimum, addr.address.address_length); - if (!hdp->hd_address) - return AE_ERROR; if (hpet_is_known(hdp)) { iounmap(hdp->hd_address); -- 2.23.0

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