]> 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 14:26:14 +0000 (16:26 +0200)
commit9845e3fd10e136997db926dca48ab3bacfe923f7
tree7a2d71546f1b89539d1bfd4d6a898ebebf2b78c5
parente1b711db5f32f2c12afeba5bf744c3cabe80ff10
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