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(parent: 500c3a1) | patch
ag71xx: fix memory corruption issues on ar7240 on ethernet start/stop
authorFelix Fietkau <[email protected]>
Thu, 4 Aug 2011 17:36:27 +0000 (17:36 +0000)
committerFelix Fietkau <[email protected]>
Thu, 4 Aug 2011 17:36:27 +0000 (17:36 +0000)
commitd2aeca6b6dbb96121b823200b15b6b2beae959f0
tree3ae86d895056e617a12082772febdde984b011a1tree | snapshot
parent500c3a147574fae2b953b00514b380b5adc9b097commit | diff
ag71xx: fix memory corruption issues on ar7240 on ethernet start/stop

When the DMA engine state gets corrupted due to a hardware issues, it
often won't stop rx until a full reset is issued. In that case the hardware
must keep a valid descriptor, otherwise it will write to random places in
system RAM, triggering random crashes. To fix this, keep a dummy descriptor
without a buffer that keeps the DMA engine in a sane state until the reset
is done

SVN-Revision: 27895
target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx.h diff | blob | history
target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c diff | blob | history
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