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(parent: 9779015) | patch
ag71xx: fix memory corruption issues on ar7240 on ethernet start/stop
authorFelix Fietkau <nbd@openwrt.org>
Thu, 4 Aug 2011 17:36:27 +0000 (17:36 +0000)
committerFelix Fietkau <nbd@openwrt.org>
Thu, 4 Aug 2011 17:36:27 +0000 (17:36 +0000)
commit1781d3384c33164612c324c4d0120e80a9cd40d3
treeb54751568f45b9ef4b3feb77b866856dc732039dtree | snapshot
parent977901576fb2e3a05173b1fb5b1c066aa9964f69commit | 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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