serial: pch: replace __get_free_page() with kmalloc()

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pch_uart_init_port() allocates a staging buffer for non-DMA receive path
using __get_free_page().

This buffer can be allocated with kmalloc() as there's nothing special
about it to go directly to the page allocator.

kmalloc() provides a better API that does not require ugly casts and
kfree() does not need to know the size of the freed object.

Replace use of __get_free_page() with kmalloc() and free_page() with
kfree().

Link: https://lore.kernel.org/all/635405e4-9423-4a25-a6e7-e03c8ea0bcbe@redhat.com
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Link: https://patch.msgid.link/20260528-b4-tty-v1-1-9da9f7aec5f2@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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This commit is contained in:

Mike Rapoport (Microsoft) 2026-05-28 13:24:17 +03:00 • committed by Greg Kroah-Hartman

parent addee0be24

commit 120fc59a20

1 changed files with 3 additions and 3 deletions

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drivers/tty/serial/pch_uart.c

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