net: stmmac: remove rx_tail_addr

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There is only one place where rx_q->rx_tail_addr is used - the new
stmmac_set_queue_rx_tail_ptr(). Make this a local variable and remove
it from struct stmmac_rx_queue.

This commit does not change the semantics - the hardware relies upon
the descriptor ring not crossing a 4GiB boundary as the high address
bits are programmed into a separate register via stmmac_init_rx_chan().
Hence, truncating the DMA address to 32-bit is fine as the register it
will be programmed into is 32-bit, and the high bits are handled
elsewhere.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://patch.msgid.link/E1w1LWJ-0000000DGSL-2jWd@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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This commit is contained in:

Russell King (Oracle) 2026-03-14 09:42:55 +00:00 • committed by Jakub Kicinski

parent e9d0cafa9d

commit bea37bda7f

2 changed files with 3 additions and 3 deletions

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1

drivers/net/ethernet/stmicro/stmmac/stmmac.h

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5

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

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