net: ethernet: ti: am65-cpsw-nuss: cleanup DMA Channels before using them

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[ Upstream commit c24cd679b0 ]

The TX and RX DMA Channels used by the driver to exchange data with CPSW
are not guaranteed to be in a clean state during driver initialization.
The Bootloader could have used the same DMA Channels without cleaning them
up in the event of failure. Thus, reset and disable the DMA Channels to
ensure that they are in a clean state before using them.

Fixes: 93a7653031 ("net: ethernet: ti: introduce am65x/j721e gigabit eth subsystem driver")
Reported-by: Schuyler Patton <spatton@ti.com>
Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/r/20240417095425.2253876-1-s-vadapalli@ti.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Siddharth Vadapalli 2024-04-17 15:24:25 +05:30 • committed by Greg Kroah-Hartman

parent 9495b7a412

commit 831157756e

1 changed files with 18 additions and 0 deletions

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drivers/net/ethernet/ti/am65-cpsw-nuss.c

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