kernel/git/next/linux-next.git/drivers/usb/serial, branch master

Merge branch 'usb-next' of https://git.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial.git

2026-07-14T13:04:15+00:00

Merge branch 'usb-next' of https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git

2026-07-14T13:04:11+00:00

USB: serial: ftdi_sio: add support for E+H FXA291

2026-07-13T09:43:39+00:00

The Commubox FXA291 by Endress+Hauser AG is a USB serial converter based on FT232B which is used to communicate with field devices. It enumerates using the FTDI vendor ID and a custom PID. usb 1-9: New USB device found, idVendor=0403, idProduct=e510, bcdDevice= 4.00 usb 1-9: New USB device strings: Mfr=1, Product=2, SerialNumber=0 usb 1-9: Product: FXA291 usb 1-9: Manufacturer: Endress+Hauser usb 1-9: SerialNumber: 00000000 ftdi_sio 1-9:1.0: FTDI USB Serial Device converter detected usb 1-9: Detected FT232B usb 1-9: FTDI USB Serial Device converter now attached to ttyUSB0 Signed-off-by: Tim Pambor Cc: stable@vger.kernel.org Signed-off-by: Johan Hovold

USB: serial: keyspan_pda: fix data loss on receive throttling

2026-07-13T09:32:52+00:00

Killing the interrupt-in urb when the line disciple requests throttling may lead to data loss if an ongoing transfer is cancelled. Instead set a flag to prevent the completion handler from resubmitting the urb until the port is unthrottled. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Cc: stable@vger.kernel.org Signed-off-by: Johan Hovold

USB: serial: keyspan_pda: drop unused driver data usb-serial pointer

2026-07-13T09:24:56+00:00

The driver data usb-serial pointer is unused since commit 66c32e483355 ("USB: serial: keyspan_pda: drop redundant usb-serial pointer"), which apparently failed to remove the pointer as intended. Signed-off-by: Johan Hovold

USB: serial: metro-usb: drop redundant initialisations

2026-07-13T09:24:55+00:00

Three functions are initialising their return value variables at declaration only to later assign them unconditionally. Signed-off-by: Johan Hovold

USB: serial: metro-usb: fix unthrottle race

2026-07-13T09:24:55+00:00

If the completion handler races with unthrottle() both functions may try to resubmit the same interrupt-in urb, but at most one will succeed. Fix the unthrottle logic using a throttle-requested flag so that only one attempt to resubmit the urb is made to avoid logging an error. Fixes: 43d186fe992d ("USB: serial: add metro-usb driver to the tree") Signed-off-by: Johan Hovold

USB: serial: metro-usb: replace unnecessary atomic allocation

2026-07-13T09:24:55+00:00

The unthrottle callback is allowed to sleep so pass the correct GFP flag to usb_submit_urb() to avoid unnecessary atomic allocations. Signed-off-by: Johan Hovold

USB: serial: digi_acceleport: fix oob port dev_printk()

2026-07-13T09:24:33+00:00

The OOB port is not registered with driver core and does not have a name. Use the USB interface with dev_printk() that may involve the OOB port to avoid log entries with no driver and a "null" device name. Fixes: f9dfbebb8b39 ("USB: serial: digi_acceleport.c: remove dbg() usage") Fixes: 194343d9364e ("USB: remove use of err() in drivers/usb/serial") Signed-off-by: Johan Hovold

USB: serial: digi_acceleport: clean up inb command submission

2026-07-13T08:09:19+00:00

Clean up the inb command handling a bit by removing an unnecessary line break and moving the assignment operator before breaking another long expression. Signed-off-by: Johan Hovold