<feed xmlns='http://www.w3.org/2005/Atom'>
<title>linux-stable.git/drivers, branch v4.4.288</title>
<subtitle>Linux kernel stable tree</subtitle>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/'/>
<entry>
<title>libata: Add ATA_HORKAGE_NO_NCQ_ON_ATI for Samsung 860 and 870 SSD.</title>
<updated>2021-10-09T11:24:30+00:00</updated>
<author>
<name>Kate Hsuan</name>
<email>hpa@redhat.com</email>
</author>
<published>2021-09-03T09:44:11+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=c90cc2e3c60dace82b7b336bb84f40d4f93767f8'/>
<id>c90cc2e3c60dace82b7b336bb84f40d4f93767f8</id>
<content type='text'>
commit 7a8526a5cd51cf5f070310c6c37dd7293334ac49 upstream.

Many users are reporting that the Samsung 860 and 870 SSD are having
various issues when combined with AMD/ATI (vendor ID 0x1002)  SATA
controllers and only completely disabling NCQ helps to avoid these
issues.

Always disabling NCQ for Samsung 860/870 SSDs regardless of the host
SATA adapter vendor will cause I/O performance degradation with well
behaved adapters. To limit the performance impact to ATI adapters,
introduce the ATA_HORKAGE_NO_NCQ_ON_ATI flag to force disable NCQ
only for these adapters.

Also, two libata.force parameters (noncqati and ncqati) are introduced
to disable and enable the NCQ for the system which equipped with ATI
SATA adapter and Samsung 860 and 870 SSDs. The user can determine NCQ
function to be enabled or disabled according to the demand.

After verifying the chipset from the user reports, the issue appears
on AMD/ATI SB7x0/SB8x0/SB9x0 SATA Controllers and does not appear on
recent AMD SATA adapters. The vendor ID of ATI should be 0x1002.
Therefore, ATA_HORKAGE_NO_NCQ_ON_AMD was modified to
ATA_HORKAGE_NO_NCQ_ON_ATI.

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=201693
Signed-off-by: Kate Hsuan &lt;hpa@redhat.com&gt;
Reviewed-by: Hans de Goede &lt;hdegoede@redhat.com&gt;
Link: https://lore.kernel.org/r/20210903094411.58749-1-hpa@redhat.com
Reviewed-by: Martin K. Petersen &lt;martin.petersen@oracle.com&gt;
Signed-off-by: Jens Axboe &lt;axboe@kernel.dk&gt;
Cc: Krzysztof Olędzki &lt;ole@ans.pl&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
commit 7a8526a5cd51cf5f070310c6c37dd7293334ac49 upstream.

Many users are reporting that the Samsung 860 and 870 SSD are having
various issues when combined with AMD/ATI (vendor ID 0x1002)  SATA
controllers and only completely disabling NCQ helps to avoid these
issues.

Always disabling NCQ for Samsung 860/870 SSDs regardless of the host
SATA adapter vendor will cause I/O performance degradation with well
behaved adapters. To limit the performance impact to ATI adapters,
introduce the ATA_HORKAGE_NO_NCQ_ON_ATI flag to force disable NCQ
only for these adapters.

Also, two libata.force parameters (noncqati and ncqati) are introduced
to disable and enable the NCQ for the system which equipped with ATI
SATA adapter and Samsung 860 and 870 SSDs. The user can determine NCQ
function to be enabled or disabled according to the demand.

After verifying the chipset from the user reports, the issue appears
on AMD/ATI SB7x0/SB8x0/SB9x0 SATA Controllers and does not appear on
recent AMD SATA adapters. The vendor ID of ATI should be 0x1002.
Therefore, ATA_HORKAGE_NO_NCQ_ON_AMD was modified to
ATA_HORKAGE_NO_NCQ_ON_ATI.

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=201693
Signed-off-by: Kate Hsuan &lt;hpa@redhat.com&gt;
Reviewed-by: Hans de Goede &lt;hdegoede@redhat.com&gt;
Link: https://lore.kernel.org/r/20210903094411.58749-1-hpa@redhat.com
Reviewed-by: Martin K. Petersen &lt;martin.petersen@oracle.com&gt;
Signed-off-by: Jens Axboe &lt;axboe@kernel.dk&gt;
Cc: Krzysztof Olędzki &lt;ole@ans.pl&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>scsi: sd: Free scsi_disk device via put_device()</title>
<updated>2021-10-09T11:24:30+00:00</updated>
<author>
<name>Ming Lei</name>
<email>ming.lei@redhat.com</email>
</author>
<published>2021-09-06T09:01:12+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=d56459d361a9a99bead8b594635353053271356c'/>
<id>d56459d361a9a99bead8b594635353053271356c</id>
<content type='text'>
[ Upstream commit 265dfe8ebbabae7959060bd1c3f75c2473b697ed ]

After a device is initialized via device_initialize() it should be freed
via put_device(). sd_probe() currently gets this wrong, fix it up.

Link: https://lore.kernel.org/r/20210906090112.531442-1-ming.lei@redhat.com
Reviewed-by: Bart Van Assche &lt;bvanassche@acm.org&gt;
Reviewed-by: Christoph Hellwig &lt;hch@lst.de&gt;
Signed-off-by: Ming Lei &lt;ming.lei@redhat.com&gt;
Signed-off-by: Martin K. Petersen &lt;martin.petersen@oracle.com&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit 265dfe8ebbabae7959060bd1c3f75c2473b697ed ]

After a device is initialized via device_initialize() it should be freed
via put_device(). sd_probe() currently gets this wrong, fix it up.

Link: https://lore.kernel.org/r/20210906090112.531442-1-ming.lei@redhat.com
Reviewed-by: Bart Van Assche &lt;bvanassche@acm.org&gt;
Reviewed-by: Christoph Hellwig &lt;hch@lst.de&gt;
Signed-off-by: Ming Lei &lt;ming.lei@redhat.com&gt;
Signed-off-by: Martin K. Petersen &lt;martin.petersen@oracle.com&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>xen-netback: correct success/error reporting for the SKB-with-fraglist case</title>
<updated>2021-10-09T11:24:30+00:00</updated>
<author>
<name>Jan Beulich</name>
<email>jbeulich@suse.com</email>
</author>
<published>2021-09-17T06:27:10+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=e24abee039fef6ede19be53ec922c327fe5f0f32'/>
<id>e24abee039fef6ede19be53ec922c327fe5f0f32</id>
<content type='text'>
[ Upstream commit 3ede7f84c7c21f93c5eac611d60eba3f2c765e0f ]

When re-entering the main loop of xenvif_tx_check_gop() a 2nd time, the
special considerations for the head of the SKB no longer apply. Don't
mistakenly report ERROR to the frontend for the first entry in the list,
even if - from all I can tell - this shouldn't matter much as the overall
transmit will need to be considered failed anyway.

Signed-off-by: Jan Beulich &lt;jbeulich@suse.com&gt;
Reviewed-by: Paul Durrant &lt;paul@xen.org&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit 3ede7f84c7c21f93c5eac611d60eba3f2c765e0f ]

When re-entering the main loop of xenvif_tx_check_gop() a 2nd time, the
special considerations for the head of the SKB no longer apply. Don't
mistakenly report ERROR to the frontend for the first entry in the list,
even if - from all I can tell - this shouldn't matter much as the overall
transmit will need to be considered failed anyway.

Signed-off-by: Jan Beulich &lt;jbeulich@suse.com&gt;
Reviewed-by: Paul Durrant &lt;paul@xen.org&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>HID: usbhid: free raw_report buffers in usbhid_stop</title>
<updated>2021-10-06T08:22:25+00:00</updated>
<author>
<name>Anirudh Rayabharam</name>
<email>mail@anirudhrb.com</email>
</author>
<published>2021-06-23T18:40:29+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=7ce4e49146612261265671b1d30d117139021030'/>
<id>7ce4e49146612261265671b1d30d117139021030</id>
<content type='text'>
commit f7744fa16b96da57187dc8e5634152d3b63d72de upstream.

Free the unsent raw_report buffers when the device is removed.

Fixes a memory leak reported by syzbot at:
https://syzkaller.appspot.com/bug?id=7b4fa7cb1a7c2d3342a2a8a6c53371c8c418ab47

Reported-by: syzbot+47b26cd837ececfc666d@syzkaller.appspotmail.com
Tested-by: syzbot+47b26cd837ececfc666d@syzkaller.appspotmail.com
Signed-off-by: Anirudh Rayabharam &lt;mail@anirudhrb.com&gt;
Signed-off-by: Jiri Kosina &lt;jkosina@suse.cz&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
commit f7744fa16b96da57187dc8e5634152d3b63d72de upstream.

Free the unsent raw_report buffers when the device is removed.

Fixes a memory leak reported by syzbot at:
https://syzkaller.appspot.com/bug?id=7b4fa7cb1a7c2d3342a2a8a6c53371c8c418ab47

Reported-by: syzbot+47b26cd837ececfc666d@syzkaller.appspotmail.com
Tested-by: syzbot+47b26cd837ececfc666d@syzkaller.appspotmail.com
Signed-off-by: Anirudh Rayabharam &lt;mail@anirudhrb.com&gt;
Signed-off-by: Jiri Kosina &lt;jkosina@suse.cz&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>HID: betop: fix slab-out-of-bounds Write in betop_probe</title>
<updated>2021-10-06T08:22:25+00:00</updated>
<author>
<name>F.A.Sulaiman</name>
<email>asha.16@itfac.mrt.ac.lk</email>
</author>
<published>2021-08-24T15:07:30+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=a4faa7153b87fbcfe4be15f4278676f79ca6e019'/>
<id>a4faa7153b87fbcfe4be15f4278676f79ca6e019</id>
<content type='text'>
commit 1e4ce418b1cb1a810256b5fb3fd33d22d1325993 upstream.

Syzbot reported slab-out-of-bounds Write bug in hid-betopff driver.
The problem is the driver assumes the device must have an input report but
some malicious devices violate this assumption.

So this patch checks hid_device's input is non empty before it's been used.

Reported-by: syzbot+07efed3bc5a1407bd742@syzkaller.appspotmail.com
Signed-off-by: F.A. SULAIMAN &lt;asha.16@itfac.mrt.ac.lk&gt;
Reviewed-by: Pavel Skripkin &lt;paskripkin@gmail.com&gt;
Signed-off-by: Jiri Kosina &lt;jkosina@suse.cz&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
commit 1e4ce418b1cb1a810256b5fb3fd33d22d1325993 upstream.

Syzbot reported slab-out-of-bounds Write bug in hid-betopff driver.
The problem is the driver assumes the device must have an input report but
some malicious devices violate this assumption.

So this patch checks hid_device's input is non empty before it's been used.

Reported-by: syzbot+07efed3bc5a1407bd742@syzkaller.appspotmail.com
Signed-off-by: F.A. SULAIMAN &lt;asha.16@itfac.mrt.ac.lk&gt;
Reviewed-by: Pavel Skripkin &lt;paskripkin@gmail.com&gt;
Signed-off-by: Jiri Kosina &lt;jkosina@suse.cz&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>EDAC/synopsys: Fix wrong value type assignment for edac_mode</title>
<updated>2021-10-06T08:22:25+00:00</updated>
<author>
<name>Sai Krishna Potthuri</name>
<email>lakshmi.sai.krishna.potthuri@xilinx.com</email>
</author>
<published>2021-08-18T07:23:14+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=be3d91ceea78f140bc6e9140ed4c53b5eadfb3af'/>
<id>be3d91ceea78f140bc6e9140ed4c53b5eadfb3af</id>
<content type='text'>
commit 5297cfa6bdf93e3889f78f9b482e2a595a376083 upstream.

dimm-&gt;edac_mode contains values of type enum edac_type - not the
corresponding capability flags. Fix that.

Issue caught by Coverity check "enumerated type mixed with another
type."

 [ bp: Rewrite commit message, add tags. ]

Fixes: ae9b56e3996d ("EDAC, synps: Add EDAC support for zynq ddr ecc controller")
Signed-off-by: Sai Krishna Potthuri &lt;lakshmi.sai.krishna.potthuri@xilinx.com&gt;
Signed-off-by: Shubhrajyoti Datta &lt;shubhrajyoti.datta@xilinx.com&gt;
Signed-off-by: Borislav Petkov &lt;bp@suse.de&gt;
Cc: &lt;stable@vger.kernel.org&gt;
Link: https://lkml.kernel.org/r/20210818072315.15149-1-shubhrajyoti.datta@xilinx.com
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;

</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
commit 5297cfa6bdf93e3889f78f9b482e2a595a376083 upstream.

dimm-&gt;edac_mode contains values of type enum edac_type - not the
corresponding capability flags. Fix that.

Issue caught by Coverity check "enumerated type mixed with another
type."

 [ bp: Rewrite commit message, add tags. ]

Fixes: ae9b56e3996d ("EDAC, synps: Add EDAC support for zynq ddr ecc controller")
Signed-off-by: Sai Krishna Potthuri &lt;lakshmi.sai.krishna.potthuri@xilinx.com&gt;
Signed-off-by: Shubhrajyoti Datta &lt;shubhrajyoti.datta@xilinx.com&gt;
Signed-off-by: Borislav Petkov &lt;bp@suse.de&gt;
Cc: &lt;stable@vger.kernel.org&gt;
Link: https://lkml.kernel.org/r/20210818072315.15149-1-shubhrajyoti.datta@xilinx.com
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;

</pre>
</div>
</content>
</entry>
<entry>
<title>ipack: ipoctal: fix module reference leak</title>
<updated>2021-10-06T08:22:25+00:00</updated>
<author>
<name>Johan Hovold</name>
<email>johan@kernel.org</email>
</author>
<published>2021-09-17T11:46:21+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=31398849b84ebae0d43a1cf379cb9895597f221a'/>
<id>31398849b84ebae0d43a1cf379cb9895597f221a</id>
<content type='text'>
commit bb8a4fcb2136508224c596a7e665bdba1d7c3c27 upstream.

A reference to the carrier module was taken on every open but was only
released once when the final reference to the tty struct was dropped.

Fix this by taking the module reference and initialising the tty driver
data when installing the tty.

Fixes: 82a82340bab6 ("ipoctal: get carrier driver to avoid rmmod")
Cc: stable@vger.kernel.org      # 3.18
Cc: Federico Vaga &lt;federico.vaga@cern.ch&gt;
Acked-by: Samuel Iglesias Gonsalvez &lt;siglesias@igalia.com&gt;
Signed-off-by: Johan Hovold &lt;johan@kernel.org&gt;
Link: https://lore.kernel.org/r/20210917114622.5412-6-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
commit bb8a4fcb2136508224c596a7e665bdba1d7c3c27 upstream.

A reference to the carrier module was taken on every open but was only
released once when the final reference to the tty struct was dropped.

Fix this by taking the module reference and initialising the tty driver
data when installing the tty.

Fixes: 82a82340bab6 ("ipoctal: get carrier driver to avoid rmmod")
Cc: stable@vger.kernel.org      # 3.18
Cc: Federico Vaga &lt;federico.vaga@cern.ch&gt;
Acked-by: Samuel Iglesias Gonsalvez &lt;siglesias@igalia.com&gt;
Signed-off-by: Johan Hovold &lt;johan@kernel.org&gt;
Link: https://lore.kernel.org/r/20210917114622.5412-6-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>ipack: ipoctal: fix missing allocation-failure check</title>
<updated>2021-10-06T08:22:25+00:00</updated>
<author>
<name>Johan Hovold</name>
<email>johan@kernel.org</email>
</author>
<published>2021-09-17T11:46:20+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=27c0c13e88c39e84c5e1a01b134a8103ea2c27a8'/>
<id>27c0c13e88c39e84c5e1a01b134a8103ea2c27a8</id>
<content type='text'>
commit 445c8132727728dc297492a7d9fc074af3e94ba3 upstream.

Add the missing error handling when allocating the transmit buffer to
avoid dereferencing a NULL pointer in write() should the allocation
ever fail.

Fixes: ba4dc61fe8c5 ("Staging: ipack: add support for IP-OCTAL mezzanine board")
Cc: stable@vger.kernel.org      # 3.5
Acked-by: Samuel Iglesias Gonsalvez &lt;siglesias@igalia.com&gt;
Signed-off-by: Johan Hovold &lt;johan@kernel.org&gt;
Link: https://lore.kernel.org/r/20210917114622.5412-5-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
commit 445c8132727728dc297492a7d9fc074af3e94ba3 upstream.

Add the missing error handling when allocating the transmit buffer to
avoid dereferencing a NULL pointer in write() should the allocation
ever fail.

Fixes: ba4dc61fe8c5 ("Staging: ipack: add support for IP-OCTAL mezzanine board")
Cc: stable@vger.kernel.org      # 3.5
Acked-by: Samuel Iglesias Gonsalvez &lt;siglesias@igalia.com&gt;
Signed-off-by: Johan Hovold &lt;johan@kernel.org&gt;
Link: https://lore.kernel.org/r/20210917114622.5412-5-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>ipack: ipoctal: fix tty-registration error handling</title>
<updated>2021-10-06T08:22:25+00:00</updated>
<author>
<name>Johan Hovold</name>
<email>johan@kernel.org</email>
</author>
<published>2021-09-17T11:46:19+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=0b211c9d291b21b841df69b12b8ed74136c5532e'/>
<id>0b211c9d291b21b841df69b12b8ed74136c5532e</id>
<content type='text'>
commit cd20d59291d1790dc74248476e928f57fc455189 upstream.

Registration of the ipoctal tty devices is unlikely to fail, but if it
ever does, make sure not to deregister a never registered tty device
(and dereference a NULL pointer) when the driver is later unbound.

Fixes: 2afb41d9d30d ("Staging: ipack/devices/ipoctal: Check tty_register_device return value.")
Cc: stable@vger.kernel.org      # 3.7
Acked-by: Samuel Iglesias Gonsalvez &lt;siglesias@igalia.com&gt;
Signed-off-by: Johan Hovold &lt;johan@kernel.org&gt;
Link: https://lore.kernel.org/r/20210917114622.5412-4-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
commit cd20d59291d1790dc74248476e928f57fc455189 upstream.

Registration of the ipoctal tty devices is unlikely to fail, but if it
ever does, make sure not to deregister a never registered tty device
(and dereference a NULL pointer) when the driver is later unbound.

Fixes: 2afb41d9d30d ("Staging: ipack/devices/ipoctal: Check tty_register_device return value.")
Cc: stable@vger.kernel.org      # 3.7
Acked-by: Samuel Iglesias Gonsalvez &lt;siglesias@igalia.com&gt;
Signed-off-by: Johan Hovold &lt;johan@kernel.org&gt;
Link: https://lore.kernel.org/r/20210917114622.5412-4-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>ipack: ipoctal: fix tty registration race</title>
<updated>2021-10-06T08:22:25+00:00</updated>
<author>
<name>Johan Hovold</name>
<email>johan@kernel.org</email>
</author>
<published>2021-09-17T11:46:18+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=e7116e81187a1a6972cb8aa3dfb9a2250f5e8a3e'/>
<id>e7116e81187a1a6972cb8aa3dfb9a2250f5e8a3e</id>
<content type='text'>
commit 65c001df517a7bf9be8621b53d43c89f426ce8d6 upstream.

Make sure to set the tty class-device driver data before registering the
tty to avoid having a racing open() dereference a NULL pointer.

Fixes: 9c1d784afc6f ("Staging: ipack/devices/ipoctal: Get rid of ipoctal_list.")
Cc: stable@vger.kernel.org      # 3.7
Acked-by: Samuel Iglesias Gonsalvez &lt;siglesias@igalia.com&gt;
Signed-off-by: Johan Hovold &lt;johan@kernel.org&gt;
Link: https://lore.kernel.org/r/20210917114622.5412-3-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
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commit 65c001df517a7bf9be8621b53d43c89f426ce8d6 upstream.

Make sure to set the tty class-device driver data before registering the
tty to avoid having a racing open() dereference a NULL pointer.

Fixes: 9c1d784afc6f ("Staging: ipack/devices/ipoctal: Get rid of ipoctal_list.")
Cc: stable@vger.kernel.org      # 3.7
Acked-by: Samuel Iglesias Gonsalvez &lt;siglesias@igalia.com&gt;
Signed-off-by: Johan Hovold &lt;johan@kernel.org&gt;
Link: https://lore.kernel.org/r/20210917114622.5412-3-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
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