ahci: Enable SB600 64bit DMA on MSI K9A2 Platinum v2 (e65cc194) · Commits · 戴 / test

drivers/ata/ahci.c

+35 −5

Original line number	Diff line number	Diff line
		@@ -2718,6 +2718,30 @@ static bool ahci_sb600_enable_64bit(struct pci_dev *pdev)
		},
		.driver_data = "20071026", /* yyyymmdd */
		},
		/*
		* All BIOS versions for the MSI K9A2 Platinum (MS-7376)
		* support 64bit DMA.
		*
		* BIOS versions earlier than 1.5 had the Manufacturer DMI
		* fields as "MICRO-STAR INTERANTIONAL CO.,LTD".
		* This spelling mistake was fixed in BIOS version 1.5, so
		* 1.5 and later have the Manufacturer as
		* "MICRO-STAR INTERNATIONAL CO.,LTD".
		* So try to match on DMI_BOARD_VENDOR of "MICRO-STAR INTER".
		*
		* BIOS versions earlier than 1.9 had a Board Product Name
		* DMI field of "MS-7376". This was changed to be
		* "K9A2 Platinum (MS-7376)" in version 1.9, but we can still
		* match on DMI_BOARD_NAME of "MS-7376".
		*/
		{
		.ident = "MSI K9A2 Platinum",
		.matches = {
		DMI_MATCH(DMI_BOARD_VENDOR,
		"MICRO-STAR INTER"),
		DMI_MATCH(DMI_BOARD_NAME, "MS-7376"),
		},
		},
		{ }
		};
		const struct dmi_system_id *match;
		@@ -2729,18 +2753,24 @@ static bool ahci_sb600_enable_64bit(struct pci_dev *pdev)
		!match)
		return false;

		if (!match->driver_data)
		goto enable_64bit;

		dmi_get_date(DMI_BIOS_DATE, &year, &month, &date);
		snprintf(buf, sizeof(buf), "%04d%02d%02d", year, month, date);

		if (strcmp(buf, match->driver_data) >= 0) {
		dev_printk(KERN_WARNING, &pdev->dev, "%s: enabling 64bit DMA\n",
		match->ident);
		return true;
		} else {
		if (strcmp(buf, match->driver_data) >= 0)
		goto enable_64bit;
		else {
		dev_printk(KERN_WARNING, &pdev->dev, "%s: BIOS too old, "
		"forcing 32bit DMA, update BIOS\n", match->ident);
		return false;
		}

		enable_64bit:
		dev_printk(KERN_WARNING, &pdev->dev, "%s: enabling 64bit DMA\n",
		match->ident);
		return true;
		}

		static bool ahci_broken_system_poweroff(struct pci_dev *pdev)

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