[PATCH] USB: storage: Remove subclass and protocol overrides from Novatek quirk

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Alan Stern

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Nov 21, 2025, 4:29:39 PM (9 days ago) Nov 21
to Greg KH, stealth, Mael GUERIN, linu...@vger.kernel.org, USB Storage list
A report from Oleg Smirnov indicates that the unusual_devs quirks
entry for the Novatek camera does not need to override the subclass
and protocol parameters:

[3266355.209532] usb 1-3: new high-speed USB device number 10 using xhci_hcd
[3266355.333031] usb 1-3: New USB device found, idVendor=0603, idProduct=8611, bcdDevice= 1.00
[3266355.333040] usb 1-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[3266355.333043] usb 1-3: Product: YICARCAM
[3266355.333045] usb 1-3: Manufacturer: XIAO-YI
[3266355.333047] usb 1-3: SerialNumber: 966110000000100
[3266355.338621] usb-storage 1-3:1.0: USB Mass Storage device detected
[3266355.338817] usb-storage 1-3:1.0: Quirks match for vid 0603 pid 8611: 4000
[3266355.338821] usb-storage 1-3:1.0: This device (0603,8611,0100 S 06 P 50) has unneeded SubClass and Protocol entries in unusual_devs.h (kernel 6.16.10-arch1-1)
Please send a copy of this message to
<linu...@vger.kernel.org> and <usb-s...@lists.one-eyed-alien.net>

The overrides are harmless but they do provoke the driver into logging
this annoying message. Update the entry to remove the unneeded entries.

Reported-by: stealth <oleg.smi...@gmail.com>
Closes: https://lore.kernel.org/CAKxjRRxhC0s19iEWoN=pEMqXJ_z8w_moC0...@mail.gmail.com/
Fixes: 6ca8af3c8fb5 ("USB: storage: Add unusual-devs entry for Novatek NTK96550-based camera")
Signed-off-by: Alan Stern <st...@rowland.harvard.edu>
CC: <sta...@vger.kernel.org>

---

drivers/usb/storage/unusual_devs.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

Index: usb-devel/drivers/usb/storage/unusual_devs.h
===================================================================
--- usb-devel.orig/drivers/usb/storage/unusual_devs.h
+++ usb-devel/drivers/usb/storage/unusual_devs.h
@@ -938,7 +938,7 @@ UNUSUAL_DEV( 0x05e3, 0x0723, 0x9451, 0x
UNUSUAL_DEV( 0x0603, 0x8611, 0x0000, 0xffff,
"Novatek",
"NTK96550-based camera",
- USB_SC_SCSI, USB_PR_BULK, NULL,
+ USB_SC_DEVICE, USB_PR_DEVICE, NULL,
US_FL_BULK_IGNORE_TAG ),

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