From 10e48c1c6c772eb9c6754dd2340843fe264f71f8 Mon Sep 17 00:00:00 2001 From: Mael GUERIN Date: Wed, 6 Aug 2025 18:44:03 +0200 Subject: 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 Cc: stable Acked-by: Alan Stern Link: https://lore.kernel.org/r/20250806164406.43450-1-mael.guerin@murena.io Signed-off-by: Greg Kroah-Hartman --- drivers/usb/storage/unusual_devs.h | 7 +++++++ 1 file changed, 7 insertions(+) --- a/drivers/usb/storage/unusual_devs.h +++ b/drivers/usb/storage/unusual_devs.h @@ -934,6 +934,13 @@ UNUSUAL_DEV( 0x05e3, 0x0723, 0x9451, 0x USB_SC_DEVICE, USB_PR_DEVICE, NULL, US_FL_SANE_SENSE ), +/* Added by Maël GUERIN */ +UNUSUAL_DEV( 0x0603, 0x8611, 0x0000, 0xffff, + "Novatek", + "NTK96550-based camera", + USB_SC_SCSI, USB_PR_BULK, NULL, + US_FL_BULK_IGNORE_TAG ), + /* * Reported by Hanno Boeck * Taken from the Lycoris Kernel