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| /linux/drivers/hid/i2c-hid/ |
| H A D | i2c-hid-core.c | diff b4ed18a3d56eabd18cfd9841ff05111e3cfbe8f9 Mon Sep 09 22:37:40 CEST 2024 Dmitry Torokhov <dmitry.torokhov@gmail.com> HID: i2c-hid: ensure various commands do not interfere with each other
i2c-hid uses 2 shared buffers: command and "raw" input buffer for
sending requests to peripherals and read data from peripherals when
executing variety of commands. Such commands include reading of HID
registers, requesting particular power mode, getting and setting
reports and so on. Because all such requests use the same 2 buffers
they should not execute simultaneously.
Fix this by introducing "cmd_lock" mutex and acquire it whenever
we needs to access ihid->cmdbuf or idid->rawbuf.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
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