intel_ips: blacklist HP ProBook laptops

intel_ips driver spews the warning message
  "ME failed to update for more than 1s, likely hung"
at each second endlessly on HP ProBook laptops with IronLake.

As this has never worked, better to blacklist the driver for now.

Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Matthew Garrett <mjg@redhat.com>

diff --git a/drivers/platform/x86/intel_ips.c b/drivers/platform/x86/intel_ips.c
index 0ffdb3cde2bbc3ff569fee774dcd842333585031..9af4257d49018443b19e447455969787b480a944 100644 (file)
--- a/drivers/platform/x86/intel_ips.c
+++ b/drivers/platform/x86/intel_ips.c
@@ -72,6 +72,7 @@
 #include <linux/string.h>
 #include <linux/tick.h>
 #include <linux/timer.h>
+#include <linux/dmi.h>
 #include <drm/i915_drm.h>
 #include <asm/msr.h>
 #include <asm/processor.h>
@@ -1485,6 +1486,24 @@ static DEFINE_PCI_DEVICE_TABLE(ips_id_table) = {
 
 MODULE_DEVICE_TABLE(pci, ips_id_table);
 
+static int ips_blacklist_callback(const struct dmi_system_id *id)
+{
+       pr_info("Blacklisted intel_ips for %s\n", id->ident);
+       return 1;
+}
+
+static const struct dmi_system_id ips_blacklist[] = {
+       {
+               .callback = ips_blacklist_callback,
+               .ident = "HP ProBook",
+               .matches = {
+                       DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
+                       DMI_MATCH(DMI_PRODUCT_NAME, "HP ProBook"),
+               },
+       },
+       { }     /* terminating entry */
+};
+
 static int ips_probe(struct pci_dev *dev, const struct pci_device_id *id)
 {
        u64 platform_info;
@@ -1494,6 +1513,9 @@ static int ips_probe(struct pci_dev *dev, const struct pci_device_id *id)
        u16 htshi, trc, trc_required_mask;
        u8 tse;
 
+       if (dmi_check_system(ips_blacklist))
+               return -ENODEV;
+
        ips = kzalloc(sizeof(struct ips_driver), GFP_KERNEL);
        if (!ips)
                return -ENOMEM;