From: Bartlomiej Zolnierkiewicz Date: Mon, 9 Jul 2007 21:17:57 +0000 (+0200) Subject: ide: fix pre-EIDE SWDMA support X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=15a4f943e729d8ba215ee551df6d7988ba14ac00;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git ide: fix pre-EIDE SWDMA support If the word 62 is not defined use the word 52 to get SWDMA mask in ide_get_mode_mask(). Signed-off-by: Bartlomiej Zolnierkiewicz --- diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c index 85db8e85443a..e8c6e1ed497a 100644 --- a/drivers/ide/ide-dma.c +++ b/drivers/ide/ide-dma.c @@ -702,8 +702,22 @@ static unsigned int ide_get_mode_mask(ide_drive_t *drive, u8 base) mask = id->dma_mword & hwif->mwdma_mask; break; case XFER_SW_DMA_0: - if (id->field_valid & 2) + if (id->field_valid & 2) { mask = id->dma_1word & hwif->swdma_mask; + } else if (id->tDMA) { + /* + * ide_fix_driveid() doesn't convert ->tDMA to the + * CPU endianness so we need to do it here + */ + u8 mode = le16_to_cpu(id->tDMA); + + /* + * if the mode is valid convert it to the mask + * (the maximum allowed mode is XFER_SW_DMA_2) + */ + if (mode <= 2) + mask = ((2 << mode) - 1) & hwif->swdma_mask; + } break; default: BUG();