misc: genwqe: handle a first DMA address of zero

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genwqe_setup_sgl() uses zero as the initial previous DMA address. DMA
address zero is valid, so a first entry at that address enters the
merge path before last_s has been assigned and dereferences NULL.

Only merge adjacent mappings after an SGL data entry has been created.

Signed-off-by: Yousef Alhouseen <alhouseenyousef@gmail.com>
Link: https://patch.msgid.link/20260630104923.53827-1-alhouseenyousef@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Yousef Alhouseen 2026-06-30 12:49:23 +02:00 • committed by Greg Kroah-Hartman

parent 7a7a0d97d5

commit d401772a9e

1 changed files with 1 additions and 1 deletions

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drivers/misc/genwqe/card_utils.c

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