]> git.apps.os.sepia.ceph.com Git - ceph-client.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>
Wed, 13 Aug 2025 15:16:46 +0000 (17:16 +0200)
commit6ca8af3c8fb584f3424a827f554ff74f898c27cd
treee0b924473275277a7f0ce7405565e890575e90a9
parent8fe06185e11ae753414aa6117f0e798aa77567ff
USB: storage: Add unusual-devs entry for Novatek NTK96550-based camera

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