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authorMaciej Sosnowski <maciej.sosnowski@intel.com>2008-07-22 10:07:33 -0700
committerDan Williams <dan.j.williams@intel.com>2008-07-22 10:07:33 -0700
commit09177e85d6a0bffac8b55afd28ed8b82bd873f0b (patch)
treece3cb72509cc6c03bfc5d70a3ca0901a44b87fc0 /drivers/dca/dca-core.c
parent2a46fa13d788364c093c4296fe01cae837aa8919 (diff)
downloadlinux-2.6.38-lt-ux500-09177e85d6a0bffac8b55afd28ed8b82bd873f0b.tar.gz
I/OAT: Add watchdog/reset functionality to ioatdma
Due to occasional DMA channel hangs observed for I/OAT versions 1.2 and 2.0 a watchdog has been introduced to check every 2 seconds if all channels progress normally. If stuck channel is detected, driver resets it. The reset is done in two parts. The second part is scheduled by the first one to reinitialize the channel after the restart. Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/dca/dca-core.c')
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