The patch titled
Subject: ocfs2: Fix data corruption after conversion from inline format
has been added to the -mm tree. Its filename is
ocfs2-fix-data-corruption-after-conversion-from-inline-format.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/ocfs2-fix-data-corruption-after-c…
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/ocfs2-fix-data-corruption-after-c…
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------------------------------------------------------
From: Jan Kara <jack(a)suse.cz>
Subject: ocfs2: Fix data corruption after conversion from inline format
Commit 6dbf7bb55598 ("fs: Don't invalidate page buffers in
block_write_full_page()") uncovered a latent bug in ocfs2 conversion
from inline inode format to a normal inode format.
The code in
ocfs2_convert_inline_data_to_extents() attempts to zero out the whole
cluster allocated for file data by grabbing, zeroing, and dirtying all
pages covering this cluster. However these pages are beyond i_size, thus
writeback code generally ignores these dirty pages and no blocks were
ever actually zeroed on the disk.
This oversight was fixed by commit 693c241a5f6a ("ocfs2: No need to zero
pages past i_size.") for standard ocfs2 write path, inline conversion path
was apparently forgotten; the commit log also has a reasoning why the
zeroing actually is not needed.
After commit 6dbf7bb55598, things became worse as writeback code stopped
invalidating buffers on pages beyond i_size and thus these pages end up
with clean PageDirty bit but with buffers attached to these pages being
still dirty. So when a file is converted from inline format, then
writeback triggers, and then the file is grown so that these pages become
valid, the invalid dirtiness state is preserved, mark_buffer_dirty() does
nothing on these pages (buffers are already dirty) but page is never
written back because it is clean. So data written to these pages is lost
once pages are reclaimed.
Simple reproducer for the problem is:
xfs_io -f -c "pwrite 0 2000" -c "pwrite 2000 2000" -c "fsync" \
-c "pwrite 4000 2000" ocfs2_file
After unmounting and mounting the fs again, you can observe that end of
'ocfs2_file' has lost its contents.
Fix the problem by not doing the pointless zeroing during conversion
from inline format similarly as in the standard write path.
Link: https://lkml.kernel.org/r/20210930095405.21433-1-jack@suse.cz
Fixes: 6dbf7bb55598 ("fs: Don't invalidate page buffers in block_write_full_page()")
Signed-off-by: Jan Kara <jack(a)suse.cz>
Cc: Mark Fasheh <mark(a)fasheh.com>
Cc: Joel Becker <jlbec(a)evilplan.org>
Cc: Junxiao Bi <junxiao.bi(a)oracle.com>
Cc: Joseph Qi <jiangqi903(a)gmail.com>
Cc: Changwei Ge <gechangwei(a)live.cn>
Cc: Gang He <ghe(a)suse.com>
Cc: Jun Piao <piaojun(a)huawei.com>
Cc: <stable(a)vger.kernel.org>
Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org>
---
fs/ocfs2/alloc.c | 46 +++++++++++----------------------------------
1 file changed, 12 insertions(+), 34 deletions(-)
--- a/fs/ocfs2/alloc.c~ocfs2-fix-data-corruption-after-conversion-from-inline-format
+++ a/fs/ocfs2/alloc.c
@@ -7045,7 +7045,7 @@ void ocfs2_set_inode_data_inline(struct
int ocfs2_convert_inline_data_to_extents(struct inode *inode,
struct buffer_head *di_bh)
{
- int ret, i, has_data, num_pages = 0;
+ int ret,has_data, num_pages = 0;
int need_free = 0;
u32 bit_off, num;
handle_t *handle;
@@ -7054,26 +7054,17 @@ int ocfs2_convert_inline_data_to_extents
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
struct ocfs2_alloc_context *data_ac = NULL;
- struct page **pages = NULL;
- loff_t end = osb->s_clustersize;
+ struct page *page = NULL;
struct ocfs2_extent_tree et;
int did_quota = 0;
has_data = i_size_read(inode) ? 1 : 0;
if (has_data) {
- pages = kcalloc(ocfs2_pages_per_cluster(osb->sb),
- sizeof(struct page *), GFP_NOFS);
- if (pages == NULL) {
- ret = -ENOMEM;
- mlog_errno(ret);
- return ret;
- }
-
ret = ocfs2_reserve_clusters(osb, 1, &data_ac);
if (ret) {
mlog_errno(ret);
- goto free_pages;
+ goto out;
}
}
@@ -7093,7 +7084,8 @@ int ocfs2_convert_inline_data_to_extents
}
if (has_data) {
- unsigned int page_end;
+ unsigned int page_end = min_t(unsigned, PAGE_SIZE,
+ osb->s_clustersize);
u64 phys;
ret = dquot_alloc_space_nodirty(inode,
@@ -7117,15 +7109,8 @@ int ocfs2_convert_inline_data_to_extents
*/
block = phys = ocfs2_clusters_to_blocks(inode->i_sb, bit_off);
- /*
- * Non sparse file systems zero on extend, so no need
- * to do that now.
- */
- if (!ocfs2_sparse_alloc(osb) &&
- PAGE_SIZE < osb->s_clustersize)
- end = PAGE_SIZE;
-
- ret = ocfs2_grab_eof_pages(inode, 0, end, pages, &num_pages);
+ ret = ocfs2_grab_eof_pages(inode, 0, page_end, &page,
+ &num_pages);
if (ret) {
mlog_errno(ret);
need_free = 1;
@@ -7136,20 +7121,15 @@ int ocfs2_convert_inline_data_to_extents
* This should populate the 1st page for us and mark
* it up to date.
*/
- ret = ocfs2_read_inline_data(inode, pages[0], di_bh);
+ ret = ocfs2_read_inline_data(inode, page, di_bh);
if (ret) {
mlog_errno(ret);
need_free = 1;
goto out_unlock;
}
- page_end = PAGE_SIZE;
- if (PAGE_SIZE > osb->s_clustersize)
- page_end = osb->s_clustersize;
-
- for (i = 0; i < num_pages; i++)
- ocfs2_map_and_dirty_page(inode, handle, 0, page_end,
- pages[i], i > 0, &phys);
+ ocfs2_map_and_dirty_page(inode, handle, 0, page_end, page, 0,
+ &phys);
}
spin_lock(&oi->ip_lock);
@@ -7180,8 +7160,8 @@ int ocfs2_convert_inline_data_to_extents
}
out_unlock:
- if (pages)
- ocfs2_unlock_and_free_pages(pages, num_pages);
+ if (page)
+ ocfs2_unlock_and_free_pages(&page, num_pages);
out_commit:
if (ret < 0 && did_quota)
@@ -7205,8 +7185,6 @@ out_commit:
out:
if (data_ac)
ocfs2_free_alloc_context(data_ac);
-free_pages:
- kfree(pages);
return ret;
}
_
Patches currently in -mm which might be from jack(a)suse.cz are
ocfs2-fix-data-corruption-after-conversion-from-inline-format.patch
Hello,
We ran automated tests on a recent commit from this kernel tree:
Kernel repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
Commit: 70248e7b378b - Linux 5.14.9
The results of these automated tests are provided below.
Overall result: PASSED
Merge: OK
Compile: OK
Tests: OK
Targeted tests: NO
All kernel binaries, config files, and logs are available for download here:
https://arr-cki-prod-datawarehouse-public.s3.amazonaws.com/index.html?prefi…
Please reply to this email if you have any questions about the tests that we
ran or if you have any suggestions on how to make future tests more effective.
,-. ,-.
( C ) ( K ) Continuous
`-',-.`-' Kernel
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`-'
______________________________________________________________________________
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---------------
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✅ Networking UDP: socket
✅ Networking cki netfilter test
✅ Networking tunnel: geneve basic test
✅ Networking tunnel: gre basic
✅ L2TP basic test
✅ Networking tunnel: vxlan basic
✅ Networking ipsec: basic netns - transport
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Host 6:
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This is not the fault of the kernel that was tested.
⚡⚡⚡ Boot test
⚡⚡⚡ Reboot test
⚡⚡⚡ xfstests - ext4
⚡⚡⚡ xfstests - xfs
⚡⚡⚡ xfstests - nfsv4.2
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⚡⚡⚡ IPMI driver test
⚡⚡⚡ IPMItool loop stress test
⚡⚡⚡ selinux-policy: serge-testsuite
⚡⚡⚡ power-management: cpupower/sanity test
⚡⚡⚡ Storage blktests - blk
⚡⚡⚡ Storage block - filesystem fio test
⚡⚡⚡ Storage block - queue scheduler test
⚡⚡⚡ storage: software RAID testing
⚡⚡⚡ Storage: swraid mdadm raid_module test
🚧 ⚡⚡⚡ Podman system test - as root
🚧 ⚡⚡⚡ Podman system test - as user
🚧 ⚡⚡⚡ CPU: Idle Test
🚧 ⚡⚡⚡ xfstests - btrfs
🚧 ⚡⚡⚡ Storage blktests - nvme-tcp
🚧 ⚡⚡⚡ Storage: lvm device-mapper test - upstream
🚧 ⚡⚡⚡ stress: stress-ng - interrupt
🚧 ⚡⚡⚡ stress: stress-ng - cpu
🚧 ⚡⚡⚡ stress: stress-ng - cpu-cache
🚧 ⚡⚡⚡ stress: stress-ng - memory
🚧 ⚡⚡⚡ stress: stress-ng - os
Test sources: https://gitlab.com/cki-project/kernel-tests
💚 Pull requests are welcome for new tests or improvements to existing tests!
Aborted tests
-------------
Tests that didn't complete running successfully are marked with ⚡⚡⚡.
If this was caused by an infrastructure issue, we try to mark that
explicitly in the report.
Waived tests
------------
If the test run included waived tests, they are marked with 🚧. Such tests are
executed but their results are not taken into account. Tests are waived when
their results are not reliable enough, e.g. when they're just introduced or are
being fixed.
Testing timeout
---------------
We aim to provide a report within reasonable timeframe. Tests that haven't
finished running yet are marked with ⏱.
Targeted tests
--------------
Test runs for patches always include a set of base tests, plus some
tests chosen based on the file paths modified by the patch. The latter
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>From 7417896fcc7aea645fa0b89f39fa55979251dca3 Mon Sep 17 00:00:00 2001
From: Patrick Ho <Patrick.Ho(a)netapp.com>
Date: Sat, 21 Aug 2021 02:56:26 -0400
Subject: [PATCH] nfsd: fix error handling of register_pernet_subsys() in
init_nfsd()
init_nfsd() should not unregister pernet subsys if the register fails
but should instead unwind from the last successful operation which is
register_filesystem().
Unregistering a failed register_pernet_subsys() call can result in
a kernel GPF as revealed by programmatically injecting an error in
register_pernet_subsys().
Verified the fix handled failure gracefully with no lingering nfsd
entry in /proc/filesystems. This change was introduced by the commit
bd5ae9288d64 ("nfsd: register pernet ops last, unregister first"),
the original error handling logic was correct.
Fixes: bd5ae9288d64 ("nfsd: register pernet ops last, unregister first")
Cc: stable(a)vger.kernel.org
Signed-off-by: Patrick Ho <Patrick.Ho(a)netapp.com>
---
fs/nfsd/nfsctl.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index c2c3d9077dc5..09ae1a0873d0 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -1545,7 +1545,7 @@ static int __init init_nfsd(void)
goto out_free_all;
return 0;
out_free_all:
- unregister_pernet_subsys(&nfsd_net_ops);
+ unregister_filesystem(&nfsd_fs_type);
out_free_exports:
remove_proc_entry("fs/nfs/exports", NULL);
remove_proc_entry("fs/nfs", NULL);
--
2.17.1
There is no "connector" child node available on every
platform, so the driver can't fail to probe when it's
missing.
Fixes: 57560ee95cb7 ("usb: typec: tipd: Don't block probing of consumer of "connector" nodes")
Reported-by: "Regupathy, Rajaram" <rajaram.regupathy(a)intel.com>
Cc: stable(a)vger.kernel.org # 5.14+
Signed-off-by: Heikki Krogerus <heikki.krogerus(a)linux.intel.com>
---
drivers/usb/typec/tipd/core.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/drivers/usb/typec/tipd/core.c b/drivers/usb/typec/tipd/core.c
index 93e56291f0cf1..b30efdb9fa9ed 100644
--- a/drivers/usb/typec/tipd/core.c
+++ b/drivers/usb/typec/tipd/core.c
@@ -628,10 +628,6 @@ static int tps6598x_probe(struct i2c_client *client)
if (ret < 0)
return ret;
- fwnode = device_get_named_child_node(&client->dev, "connector");
- if (!fwnode)
- return -ENODEV;
-
/*
* This fwnode has a "compatible" property, but is never populated as a
* struct device. Instead we simply parse it to read the properties.
@@ -639,7 +635,9 @@ static int tps6598x_probe(struct i2c_client *client)
* with existing DT files, we work around this by deleting any
* fwnode_links to/from this fwnode.
*/
- fw_devlink_purge_absent_suppliers(fwnode);
+ fwnode = device_get_named_child_node(&client->dev, "connector");
+ if (fwnode)
+ fw_devlink_purge_absent_suppliers(fwnode);
tps->role_sw = fwnode_usb_role_switch_get(fwnode);
if (IS_ERR(tps->role_sw)) {
--
2.33.0
Commit 6dbf7bb55598 ("fs: Don't invalidate page buffers in
block_write_full_page()") uncovered a latent bug in ocfs2 conversion
from inline inode format to a normal inode format. The code in
ocfs2_convert_inline_data_to_extents() attempts to zero out the whole
cluster allocated for file data by grabbing, zeroing, and dirtying all
pages covering this cluster. However these pages are beyond i_size, thus
writeback code generally ignores these dirty pages and no blocks were
ever actually zeroed on the disk. This oversight was fixed by commit
693c241a5f6a ("ocfs2: No need to zero pages past i_size.") for standard
ocfs2 write path, inline conversion path was apparently forgotten; the
commit log also has a reasoning why the zeroing actually is not needed.
After commit 6dbf7bb55598, things became worse as writeback code stopped
invalidating buffers on pages beyond i_size and thus these pages end up
with clean PageDirty bit but with buffers attached to these pages being
still dirty. So when a file is converted from inline format, then
writeback triggers, and then the file is grown so that these pages
become valid, the invalid dirtiness state is preserved,
mark_buffer_dirty() does nothing on these pages (buffers are already
dirty) but page is never written back because it is clean. So data
written to these pages is lost once pages are reclaimed.
Simple reproducer for the problem is:
xfs_io -f -c "pwrite 0 2000" -c "pwrite 2000 2000" -c "fsync" \
-c "pwrite 4000 2000" ocfs2_file
After unmounting and mounting the fs again, you can observe that end of
'ocfs2_file' has lost its contents.
Fix the problem by not doing the pointless zeroing during conversion
from inline format similarly as in the standard write path.
CC: stable(a)vger.kernel.org
Fixes: 6dbf7bb55598 ("fs: Don't invalidate page buffers in block_write_full_page()")
Signed-off-by: Jan Kara <jack(a)suse.cz>
---
fs/ocfs2/alloc.c | 46 ++++++++++++----------------------------------
1 file changed, 12 insertions(+), 34 deletions(-)
diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
index f1cc8258d34a..12aead0dabe2 100644
--- a/fs/ocfs2/alloc.c
+++ b/fs/ocfs2/alloc.c
@@ -7045,7 +7045,7 @@ void ocfs2_set_inode_data_inline(struct inode *inode, struct ocfs2_dinode *di)
int ocfs2_convert_inline_data_to_extents(struct inode *inode,
struct buffer_head *di_bh)
{
- int ret, i, has_data, num_pages = 0;
+ int ret,has_data, num_pages = 0;
int need_free = 0;
u32 bit_off, num;
handle_t *handle;
@@ -7054,26 +7054,17 @@ int ocfs2_convert_inline_data_to_extents(struct inode *inode,
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
struct ocfs2_alloc_context *data_ac = NULL;
- struct page **pages = NULL;
- loff_t end = osb->s_clustersize;
+ struct page *page = NULL;
struct ocfs2_extent_tree et;
int did_quota = 0;
has_data = i_size_read(inode) ? 1 : 0;
if (has_data) {
- pages = kcalloc(ocfs2_pages_per_cluster(osb->sb),
- sizeof(struct page *), GFP_NOFS);
- if (pages == NULL) {
- ret = -ENOMEM;
- mlog_errno(ret);
- return ret;
- }
-
ret = ocfs2_reserve_clusters(osb, 1, &data_ac);
if (ret) {
mlog_errno(ret);
- goto free_pages;
+ goto out;
}
}
@@ -7093,7 +7084,8 @@ int ocfs2_convert_inline_data_to_extents(struct inode *inode,
}
if (has_data) {
- unsigned int page_end;
+ unsigned int page_end = min_t(unsigned, PAGE_SIZE,
+ osb->s_clustersize);
u64 phys;
ret = dquot_alloc_space_nodirty(inode,
@@ -7117,15 +7109,8 @@ int ocfs2_convert_inline_data_to_extents(struct inode *inode,
*/
block = phys = ocfs2_clusters_to_blocks(inode->i_sb, bit_off);
- /*
- * Non sparse file systems zero on extend, so no need
- * to do that now.
- */
- if (!ocfs2_sparse_alloc(osb) &&
- PAGE_SIZE < osb->s_clustersize)
- end = PAGE_SIZE;
-
- ret = ocfs2_grab_eof_pages(inode, 0, end, pages, &num_pages);
+ ret = ocfs2_grab_eof_pages(inode, 0, page_end, &page,
+ &num_pages);
if (ret) {
mlog_errno(ret);
need_free = 1;
@@ -7136,20 +7121,15 @@ int ocfs2_convert_inline_data_to_extents(struct inode *inode,
* This should populate the 1st page for us and mark
* it up to date.
*/
- ret = ocfs2_read_inline_data(inode, pages[0], di_bh);
+ ret = ocfs2_read_inline_data(inode, page, di_bh);
if (ret) {
mlog_errno(ret);
need_free = 1;
goto out_unlock;
}
- page_end = PAGE_SIZE;
- if (PAGE_SIZE > osb->s_clustersize)
- page_end = osb->s_clustersize;
-
- for (i = 0; i < num_pages; i++)
- ocfs2_map_and_dirty_page(inode, handle, 0, page_end,
- pages[i], i > 0, &phys);
+ ocfs2_map_and_dirty_page(inode, handle, 0, page_end, page, 0,
+ &phys);
}
spin_lock(&oi->ip_lock);
@@ -7180,8 +7160,8 @@ int ocfs2_convert_inline_data_to_extents(struct inode *inode,
}
out_unlock:
- if (pages)
- ocfs2_unlock_and_free_pages(pages, num_pages);
+ if (page)
+ ocfs2_unlock_and_free_pages(&page, num_pages);
out_commit:
if (ret < 0 && did_quota)
@@ -7205,8 +7185,6 @@ int ocfs2_convert_inline_data_to_extents(struct inode *inode,
out:
if (data_ac)
ocfs2_free_alloc_context(data_ac);
-free_pages:
- kfree(pages);
return ret;
}
--
2.26.2
Commit 5c912e679506 ("usb: cdc-wdm: fix build error when CONFIG_WWAN_CORE
is not set") fixed a build error when CONFIG_WWAN was set but
CONFIG_WWAN_CORE was not. Since then CONFIG_WWAN_CORE was removed and
joined with CONFIG_WWAN in commit 89212e160b81 ("net: wwan: Fix WWAN
config symbols").
Also, since CONFIG_WWAN has class tri-state instead of bool, we cannot
check if it is defined directly, but have to use IS_DEFINED() instead.
Fixes: 5c912e679506 ("usb: cdc-wdm: fix build error when CONFIG_WWAN_CORE is not set")
Cc: <stable(a)vger.kernel.org>
Signed-off-by: Rikard Falkeborn <rikard.falkeborn(a)gmail.com>
---
drivers/usb/class/cdc-wdm.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c
index 35d5908b5478..03b25aaaa1dd 100644
--- a/drivers/usb/class/cdc-wdm.c
+++ b/drivers/usb/class/cdc-wdm.c
@@ -824,7 +824,7 @@ static struct usb_class_driver wdm_class = {
};
/* --- WWAN framework integration --- */
-#ifdef CONFIG_WWAN_CORE
+#if IS_ENABLED(CONFIG_WWAN)
static int wdm_wwan_port_start(struct wwan_port *port)
{
struct wdm_device *desc = wwan_port_get_drvdata(port);
@@ -963,11 +963,11 @@ static void wdm_wwan_rx(struct wdm_device *desc, int length)
/* inbuf has been copied, it is safe to check for outstanding data */
schedule_work(&desc->service_outs_intr);
}
-#else /* CONFIG_WWAN_CORE */
+#else /* CONFIG_WWAN */
static void wdm_wwan_init(struct wdm_device *desc) {}
static void wdm_wwan_deinit(struct wdm_device *desc) {}
static void wdm_wwan_rx(struct wdm_device *desc, int length) {}
-#endif /* CONFIG_WWAN_CORE */
+#endif /* CONFIG_WWAN */
/* --- error handling --- */
static void wdm_rxwork(struct work_struct *work)
--
2.33.0
A recent change that started reporting break events forgot to push the
event to the line discipline, which meant that a detected break would
not be reported until further characters had been receive (the port
could even have been closed and reopened in between).
Fixes: 08dff274edda ("cdc-acm: fix BREAK rx code path adding necessary calls")
Cc: stable(a)vger.kernel.org
Signed-off-by: Johan Hovold <johan(a)kernel.org>
---
drivers/usb/class/cdc-acm.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index c7a1736720e7..7b2e2420ecae 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -340,6 +340,9 @@ static void acm_process_notification(struct acm *acm, unsigned char *buf)
acm->iocount.overrun++;
spin_unlock_irqrestore(&acm->read_lock, flags);
+ if (newctrl & ACM_CTRL_BRK)
+ tty_flip_buffer_push(&acm->port);
+
if (difference)
wake_up_all(&acm->wioctl);
--
2.32.0
A recent change that started reporting break events to the line
discipline caused the tty-buffer insertions to no longer be serialised
by inserting events also from the completion handler for the interrupt
endpoint.
Completion calls for distinct endpoints are not guaranteed to be
serialised. For example, in case a host-controller driver uses
bottom-half completion, the interrupt and bulk-in completion handlers
can end up running in parallel on two CPUs (high-and low-prio tasklets,
respectively) thereby breaking the tty layer's single producer
assumption.
Fix this by holding the read lock also when inserting characters from
the bulk endpoint.
Fixes: 08dff274edda ("cdc-acm: fix BREAK rx code path adding necessary calls")
Cc: stable(a)vger.kernel.org
Signed-off-by: Johan Hovold <johan(a)kernel.org>
---
drivers/usb/class/cdc-acm.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 4e2f1552f4b7..c7a1736720e7 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -475,11 +475,16 @@ static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags)
static void acm_process_read_urb(struct acm *acm, struct urb *urb)
{
+ unsigned long flags;
+
if (!urb->actual_length)
return;
+ spin_lock_irqsave(&acm->read_lock, flags);
tty_insert_flip_string(&acm->port, urb->transfer_buffer,
urb->actual_length);
+ spin_unlock_irqrestore(&acm->read_lock, flags);
+
tty_flip_buffer_push(&acm->port);
}
--
2.32.0