Hi, On Friday, June 06, 2014 11:10:58 AM Suravee Suthikulanit wrote: > Hans/Bartlomiej, > > Do you guys have any questions about this patch? Sorry for the delay, some questions regarding the patch below. > Thank you, > > Suravee > > On 6/3/2014 12:58 PM, Tejun Heo wrote: > > Hans, Bartlomiej, can you guys please review this patch? > > > > Thanks. > > > > On Fri, May 23, 2014 at 12:35:10PM -0500, suravee.suthikulpanit@xxxxxxx wrote: > >> From: Suravee Suthikulpanit <Suravee.Suthikulpanit@xxxxxxx> > >> > >> The current platform AHCI drier does not set the dma_mask correctly > >> for 64-bit DMA capable AHCI controller. This patch checks the AHCI > >> capability bit and set the dma_mask and coherent_dma_mask accordingly. > >> > >> Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@xxxxxxx> > >> --- > >> drivers/ata/libahci_platform.c | 9 +++++++++ > >> 1 file changed, 9 insertions(+) > >> > >> diff --git a/drivers/ata/libahci_platform.c b/drivers/ata/libahci_platform.c > >> index 7cb3a85..85049ef 100644 > >> --- a/drivers/ata/libahci_platform.c > >> +++ b/drivers/ata/libahci_platform.c > >> @@ -368,6 +368,15 @@ int ahci_platform_init_host(struct platform_device *pdev, > >> ahci_init_controller(host); > >> ahci_print_info(host, "platform"); > >> > >> + if (hpriv->cap & HOST_CAP_64) { > >> + if (!dev->dma_mask) What configuration is the above dev->dma_mask checking supposed to handle? Is it really needed? If not the current dma_set_mask_and_coherent() call can be replaced by dma_coerce_mask_and_coherent() one. > >> + dev->dma_mask = &dev->coherent_dma_mask; > >> + > >> + rc = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)); > >> + if (rc) > >> + return rc; Shouldn't we try to set DMA masks to 32-bit ones on error (like it is done in ahci_configure_dma_masks()) instead of failing the initialization? > >> + } > >> + > >> return ata_host_activate(host, irq, ahci_interrupt, IRQF_SHARED, > >> &ahci_platform_sht); > >> } > >> -- > >> 1.9.0 BTW It seems that after DMA masks handling is fixed in the generic AHCI platform code the driver specific code in ahci_xgene.c can be removed. Best regards, -- Bartlomiej Zolnierkiewicz Samsung R&D Institute Poland Samsung Electronics -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html