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hpt366: fix HPT370 DMA timeouts
The big driver change in 2.4.19-rc1 introduced a regression for many HPT370[A] chips -- DMA stopped to work completely, only causing endless timeouts... The culprit has been identified (at last!): it turned to be the code resetting the DMA state machine before each transfer. Stop doing it now as this counter- measure has clearly caused more harm than good. This should fix the kernel.org bug #7703. Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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1 changed files with 3 additions and 1 deletions
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@ -114,6 +114,8 @@
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* the register setting lists into the table indexed by the clock selected
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* - set the correct hwif->ultra_mask for each individual chip
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* - add Ultra and MW DMA mode filtering for the HPT37[24] based SATA cards
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* - stop resetting HPT370's state machine before each DMA transfer as that has
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* caused more harm than good
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* Sergei Shtylyov, <sshtylyov@ru.mvista.com> or <source@mvista.com>
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*/
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@ -133,7 +135,7 @@
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#define DRV_NAME "hpt366"
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/* various tuning parameters */
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#define HPT_RESET_STATE_ENGINE
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#undef HPT_RESET_STATE_ENGINE
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#undef HPT_DELAY_INTERRUPT
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static const char *quirk_drives[] = {
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