Messages in this thread Patch in this message | | | Date | Thu, 17 Jul 2003 14:14:10 -0400 | From | Ben Collins <> | Subject | [PATCH] Fix ALi15x3 DMA on sparc64 (maybe others) |
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Attached is a patch that is known to fix atleast the DMA corruption occuring on sparc64 in 2.4.x kernels for ALi15x3 IDE chipsets. I think Alan hinted that someone also reported it fixed a similar problem on alpha.
I've been using this patch for some time now, with great results, and Debian unstable sparc64 users have unknowingly been testing the patch aswell. No reports of problems.
Please apply for 2.4.22. Original patch was from Ivan Kokshaysky.
--- linux/drivers/ide/pci/alim15x3.c.orig Tue Apr 22 19:17:22 2003 +++ linux/drivers/ide/pci/alim15x3.c Tue May 27 17:42:17 2003 @@ -525,10 +525,14 @@ static int ali15x3_config_drive_for_dma( drive->init_speed = 0; + /* Set reasonable PIO timings first - some of them are needed + for DMA as well. */ + hwif->tuneproc(drive, 255); + if ((id->capability & 1) != 0 && drive->autodma) { /* Consult the list of known "bad" drives */ if (hwif->ide_dma_bad_drive(drive)) - goto ata_pio; + goto no_dma_set; if ((id->field_valid & 4) && (m5229_revision >= 0xC2)) { if (id->dma_ultra & hwif->ultra_mask) { /* Force if Capable UltraDMA */ @@ -550,11 +554,9 @@ try_dma_modes: if (!config_chipset_for_dma(drive)) goto no_dma_set; } else { - goto ata_pio; + goto no_dma_set; } } else { -ata_pio: - hwif->tuneproc(drive, 255); no_dma_set: return hwif->ide_dma_off_quietly(drive); } -- Debian - http://www.debian.org/ Linux 1394 - http://www.linux1394.org/ Subversion - http://subversion.tigris.org/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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