kernel.git/drivers/misc/mei/interrupt.c, branch linux-6.16.y

mei: Cast the cb->ext_hdr allocation type

2025-05-01T15:57:15Z

In preparation for making the kmalloc family of allocators type aware, we need to make sure that the returned type from the allocation matches the type of the variable being assigned. (Before, the allocator would always return "void *", which can be implicitly cast to any pointer type.) The assigned type is "struct mei_ext_hdr *", but the returned type will be "struct mei_ext_hdr_gsc_f2h *", which is a larger allocation size. This is by design as struct mei_ext_hdr_gsc_f2h contains struct mei_ext_hdr as its first member. Cast the allocation to the match the assignment. Signed-off-by: Kees Cook Acked-by: Alexander Usyskin Link: https://lore.kernel.org/r/20250426061815.work.435-kees@kernel.org Signed-off-by: Greg Kroah-Hartman

misc: mei: interrupt.c: fix kernel-doc warnings

2023-10-18T08:01:34Z

Fix kernel-doc warnings in interrupt.c: interrupt.c:631: warning: contents before sections Signed-off-by: Randy Dunlap Cc: Tomas Winkler Cc: Arnd Bergmann Cc: Greg Kroah-Hartman Link: https://lore.kernel.org/r/20231012024845.29169-7-rdunlap@infradead.org Signed-off-by: Greg Kroah-Hartman

mei: docs: fix spelling errors

2023-10-18T08:01:33Z

Fix spelling errors in the mei code base. Signed-off-by: Tomas Winkler Reviewed-by: Randy Dunlap Link: https://lore.kernel.org/r/20231011074301.223879-4-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman

mei: add support to GSC extended header

2022-10-03T18:29:07Z

GSC extend header is of variable size and data is provided in a sgl list inside the header and not in the data buffers, need to enable the path. Signed-off-by: Tomas Winkler Signed-off-by: Daniele Ceraolo Spurio Cc: Vitaly Lubart Cc: Greg Kroah-Hartman Reviewed-by: Greg Kroah-Hartman Link: https://patchwork.freedesktop.org/patch/msgid/20220928004145.745803-2-daniele.ceraolospurio@intel.com

mei: avoid iterator usage outside of list_for_each_entry

2022-03-18T12:48:30Z

Usage of the iterator outside of the list_for_each_entry is considered harmful. https://lkml.org/lkml/2022/2/17/1032 Do not reference the loop variable outside of the loop, by rearranging the orders of execution. Instead of performing search loop and checking outside the loop if the end of the list was hit and no matching element was found, the execution is performed inside the loop upon a successful match followed by a goto statement to the next step, therefore no condition has to be performed after the loop has ended. Cc: Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Link: https://lore.kernel.org/r/20220308095926.300412-1-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman

mei: revamp mei extension header structure layout.

2021-06-22T10:40:31Z

The mei extension header was build as array of flexible structures which will not work if actually more headers are added. (Currently only vtag header was used). Sparse reports: drivers/misc/mei/hw.h:253:32: warning: array of flexible structures Use basic type u8 for the variable sized extension. Define explicitly mei_ext_hdr_vtag structure. And also fix mei_ext_next() function to point correctly to the end of the header. Note: the headers are part of firmware interface and need to be __packed. Signed-off-by: Tomas Winkler Link: https://lore.kernel.org/r/20210621193756.134027-2-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman

mei: request autosuspend after sending rx flow control

2021-05-27T13:17:19Z

A rx flow control waiting in the control queue may block autosuspend. Re-request autosuspend after flow control been sent to unblock the transition to the low power state. Cc: Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Link: https://lore.kernel.org/r/20210526193334.445759-1-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman

mei: implement client dma setup.

2021-02-06T14:48:11Z

Implement HBM message protocol to setup and tear down DMA buffer on behalf of an client. On top there DMA buffer allocation and its life time management. Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Link: https://lore.kernel.org/r/20210206144325.25682-5-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman

mei: fix transfer over dma with extended header

2021-01-29T15:59:11Z

The size in header field for packet transferred over DMA includes size of the extended header. Include extended header in size check. Add size and sanity checks on extended header. Cc: # v5.10+ Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Link: https://lore.kernel.org/r/20210129120752.850325-1-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman

mei: add support for mei extended header.

2020-08-18T13:44:43Z

Add an extend header beyond existing 4 bytes of the mei message header. The extension is of variable length, starting with meta header that contains the number of headers and the overall size of the extended headers excluding meta header itself followed by TLV list of extended headers. Currently only supported extension is the vtag. From the HW perspective the extended headers is already part of the payload. Signed-off-by: Tomas Winkler Signed-off-by: Alexander Usyskin Link: https://lore.kernel.org/r/20200818115147.2567012-5-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman