net: stmmac: use dma_addr_t for DMA addresses

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In jumbo_frm() (implemented in both "chain_mode.c" and "ring_mode.c"),
an unsigned integer local variable is used to hold the value returned
by dma_map_single().  On systems where a dma_addr_t is 64 bits, the
subsequent dma_mapping_error() check of the returned value operates
only on the low 32 bits (whose high bit won't be sign-extended).  In
this case, dma_mapping_error() would return 0 (no error) even if there
were one.

Fix this in both spots by using a dma_addr_t for the local variable.

Reported-by: Sashiko <sashiko-bot@kernel.org>
Link: https://lore.kernel.org/linux-devicetree/20260606010122.21A211F00899@smtp.kernel.org/
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Signed-off-by: Alex Elder <elder@riscstar.com>
Link: https://patch.msgid.link/20260812163832.271742-2-elder@riscstar.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Alex Elder 2026-08-12 11:38:30 -05:00 • committed by Jakub Kicinski

parent 97a1e65df7

commit 0c1f9020d2

2 changed files with 4 additions and 2 deletions

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3

drivers/net/ethernet/stmicro/stmmac/chain_mode.c

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3

drivers/net/ethernet/stmicro/stmmac/ring_mode.c

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