ahci: use BIOS date in broken_suspend list

commit 9deb343189b3cf45e84dd08480f330575ffe2004 upstream.

HP is recycling both DMI_PRODUCT_NAME and DMI_BIOS_VERSION making
ahci_broken_suspend() trigger for later products which are not
affected by the original problems.  Match BIOS date instead of version
and add references to bko's so that full information can be found
easier later.

This fixes http://bugzilla.kernel.org/show_bug.cgi?id=15462

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: tigerfishdaisy@gmail.com
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index a587046e9966436f6824e4d996164f55a48225d9..2c530247c96b1cdec0f7086e7b4c4ac89b3c324c 100644 (file)
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -2831,6 +2831,14 @@ static bool ahci_broken_suspend(struct pci_dev *pdev)
                 * On HP dv[4-6] and HDX18 with earlier BIOSen, link
                 * to the harddisk doesn't become online after
                 * resuming from STR.  Warn and fail suspend.
+                *
+                * http://bugzilla.kernel.org/show_bug.cgi?id=12276
+                *
+                * Use dates instead of versions to match as HP is
+                * apparently recycling both product and version
+                * strings.
+                *
+                * http://bugzilla.kernel.org/show_bug.cgi?id=15462
                 */
                {
                        .ident = "dv4",
@@ -2839,7 +2847,7 @@ static bool ahci_broken_suspend(struct pci_dev *pdev)
                                DMI_MATCH(DMI_PRODUCT_NAME,
                                          "HP Pavilion dv4 Notebook PC"),
                        },
-                       .driver_data = "F.30", /* cutoff BIOS version */
+                       .driver_data = "20090105",      /* F.30 */
                },
                {
                        .ident = "dv5",
@@ -2848,7 +2856,7 @@ static bool ahci_broken_suspend(struct pci_dev *pdev)
                                DMI_MATCH(DMI_PRODUCT_NAME,
                                          "HP Pavilion dv5 Notebook PC"),
                        },
-                       .driver_data = "F.16", /* cutoff BIOS version */
+                       .driver_data = "20090506",      /* F.16 */
                },
                {
                        .ident = "dv6",
@@ -2857,7 +2865,7 @@ static bool ahci_broken_suspend(struct pci_dev *pdev)
                                DMI_MATCH(DMI_PRODUCT_NAME,
                                          "HP Pavilion dv6 Notebook PC"),
                        },
-                       .driver_data = "F.21",  /* cutoff BIOS version */
+                       .driver_data = "20090423",      /* F.21 */
                },
                {
                        .ident = "HDX18",
@@ -2866,7 +2874,7 @@ static bool ahci_broken_suspend(struct pci_dev *pdev)
                                DMI_MATCH(DMI_PRODUCT_NAME,
                                          "HP HDX18 Notebook PC"),
                        },
-                       .driver_data = "F.23",  /* cutoff BIOS version */
+                       .driver_data = "20090430",      /* F.23 */
                },
                /*
                 * Acer eMachines G725 has the same problem.  BIOS
@@ -2874,6 +2882,8 @@ static bool ahci_broken_suspend(struct pci_dev *pdev)
                 * work.  Inbetween, there are V1.06, V2.06 and V3.03
                 * that we don't have much idea about.  For now,
                 * blacklist anything older than V3.04.
+                *
+                * http://bugzilla.kernel.org/show_bug.cgi?id=15104
                 */
                {
                        .ident = "G725",
@@ -2881,19 +2891,21 @@ static bool ahci_broken_suspend(struct pci_dev *pdev)
                                DMI_MATCH(DMI_SYS_VENDOR, "eMachines"),
                                DMI_MATCH(DMI_PRODUCT_NAME, "eMachines G725"),
                        },
-                       .driver_data = "V3.04", /* cutoff BIOS version */
+                       .driver_data = "20091216",      /* V3.04 */
                },
                { }     /* terminate list */
        };
        const struct dmi_system_id *dmi = dmi_first_match(sysids);
-       const char *ver;
+       int year, month, date;
+       char buf[9];
 
        if (!dmi || pdev->bus->number || pdev->devfn != PCI_DEVFN(0x1f, 2))
                return false;
 
-       ver = dmi_get_system_info(DMI_BIOS_VERSION);
+       dmi_get_date(DMI_BIOS_DATE, &year, &month, &date);
+       snprintf(buf, sizeof(buf), "%04d%02d%02d", year, month, date);
 
-       return !ver || strcmp(ver, dmi->driver_data) < 0;
+       return strcmp(buf, dmi->driver_data) < 0;
 }
 
 static bool ahci_broken_online(struct pci_dev *pdev)