Jun Yan 814f6aa7ff USB: usblp: return error when setting unsupported protocol ...

BugLink: https://bugs.launchpad.net/bugs/2106770

commit 7a3d76a0b60b3f6fc3375e4de2174bab43f64545 upstream.

Fix the regression introduced by commit d8c6edfa3f ("USB:
usblp: don't call usb_set_interface if there's a single alt"),
which causes that unsupported protocols can also be set via
ioctl when the num_altsetting of the device is 1.

Move the check for protocol support to the earlier stage.

Fixes: d8c6edfa3f ("USB: usblp: don't call usb_set_interface if there's a single alt")
Cc: stable <stable@kernel.org>
Signed-off-by: Jun Yan <jerrysteve1101@gmail.com>
Link: https://lore.kernel.org/r/20241212143852.671889-1-jerrysteve1101@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Manuel Diewald <manuel.diewald@canonical.com>
Signed-off-by: Mehmet Basaran <mehmet.basaran@canonical.com>

2025-04-15 19:59:45 +03:00

..

cdc-acm.c

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cdc-acm.h

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cdc-wdm.c

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Kconfig

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Makefile

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usblp.c

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usbtmc.c

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