]> git.ipfire.org Git - thirdparty/kernel/stable.git/commit
USB: storage: Add unusual-devs entry for Novatek NTK96550-based camera
authorMael GUERIN <mael.guerin@murena.io>
Wed, 6 Aug 2025 16:44:03 +0000 (18:44 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 28 Aug 2025 14:31:09 +0000 (16:31 +0200)
commitad105db0a264ba6839ada75c1ea9f4e98efb375a
treef1b9a04d1a1da1722535ebb9f02aba424d9f878f
parent5bbe1e67fc677c322ddccd1520c9b008c7ccbe3d
USB: storage: Add unusual-devs entry for Novatek NTK96550-based camera

commit 6ca8af3c8fb584f3424a827f554ff74f898c27cd upstream.

Add the US_FL_BULK_IGNORE_TAG quirk for Novatek NTK96550-based camera
to fix USB resets after sending SCSI vendor commands due to CBW and
CSW tags difference, leading to undesired slowness while communicating
with the device.

Please find below the copy of /sys/kernel/debug/usb/devices with my
device plugged in (listed as TechSys USB mass storage here, the
underlying chipset being the Novatek NTK96550-based camera):

T:  Bus=03 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  3 Spd=480  MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=0603 ProdID=8611 Rev= 0.01
S:  Manufacturer=TechSys
S:  Product=USB Mass Storage
S:  SerialNumber=966110000000100
C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr=100mA
I:* If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage
E:  Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms

Signed-off-by: Mael GUERIN <mael.guerin@murena.io>
Cc: stable <stable@kernel.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20250806164406.43450-1-mael.guerin@murena.io
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/storage/unusual_devs.h