Input: ims-pcu - fix DMA mapping violation in line setup

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commit 8adf4289d9 upstream.

In ims_pcu_line_setup(), the driver uses pcu->cmd_buf as a transfer
buffer for usb_control_msg(). However, pcu->cmd_buf is embedded in the
struct ims_pcu allocation, which violates DMA mapping rules regarding
cacheline alignment.

Use a heap-allocated buffer for the line coding data instead.

Fixes: 628329d524 ("Input: add IMS Passenger Control Unit driver")
Cc: stable@vger.kernel.org
Reported-by: Sashiko bot <sashiko-bot@kernel.org>
Assisted-by: Gemini:gemini-3.1-pro
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Dmitry Torokhov 2026-05-22 10:30:44 -07:00 • committed by Greg Kroah-Hartman

parent 3e0e8d7f81

commit b208bf48c7

1 changed files with 7 additions and 2 deletions

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drivers/input/misc/ims-pcu.c

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