]> 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 14:28:46 +0000 (16:28 +0200)
commitadfdc6ed189b8b3bf220234df39e5ae3b73c3f51
tree958c0329a5452147917493bce559c5ed59791893
parentcd3bace9c9a3720f0af02e7e4479f7e7ee37ca02
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