ag71xx: fix a memory corruption bug that happens if you flood the interface with packets while it's being brought down fixes boot time crashes under load reported by matteo
SVN-Revision: 22054
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1 changed files with 6 additions and 0 deletions
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@ -454,6 +454,12 @@ static void ag71xx_dma_reset(struct ag71xx *ag)
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ag71xx_wr(ag, AG71XX_REG_RX_CTRL, 0);
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ag71xx_wr(ag, AG71XX_REG_TX_CTRL, 0);
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/*
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* give the hardware some time to really stop all rx/tx activity
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* clearing the descriptors too early causes random memory corruption
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*/
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mdelay(1);
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/* clear descriptor addresses */
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ag71xx_wr(ag, AG71XX_REG_TX_DESC, 0);
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ag71xx_wr(ag, AG71XX_REG_RX_DESC, 0);
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