Home Home > GIT Browse
summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorVishal Verma <vishal.l.verma@intel.com>2016-08-19 14:40:58 -0600
committerDan Williams <dan.j.williams@intel.com>2016-08-23 07:49:08 -0700
commitc09f12186d6b03b798832d95289af76495990192 (patch)
treee13e47bd7190438874b9a470a099f6d396ebeb23
parent02486c2905a7caa50b0f508a86e03d12d8d24ac4 (diff)
acpi, nfit: check for the correct event code in notifications
Commit 209851649dc4 "acpi: nfit: Add support for hot-add" added support for _FIT notifications, but it neglected to verify the notification event code matches the one in the ACPI spec for "NFIT Update". Currently there is only one code in the spec, but once additional codes are added, older kernels (without this fix) will misbehave by assuming all event notifications are for an NFIT Update. Fixes: 209851649dc4 ("acpi: nfit: Add support for hot-add") Cc: <stable@vger.kernel.org> Cc: <linux-acpi@vger.kernel.org> Cc: Dan Williams <dan.j.williams@intel.com> Reported-by: Linda Knippers <linda.knippers@hpe.com> Signed-off-by: Vishal Verma <vishal.l.verma@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
-rw-r--r--drivers/acpi/nfit/core.c3
-rw-r--r--drivers/acpi/nfit/nfit.h4
2 files changed, 7 insertions, 0 deletions
diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
index 80cc7c089a15..4a363bed89b3 100644
--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -2681,6 +2681,9 @@ static void acpi_nfit_notify(struct acpi_device *adev, u32 event)
dev_dbg(dev, "%s: event: %d\n", __func__, event);
+ if (event != NFIT_NOTIFY_UPDATE)
+ return;
+
device_lock(dev);
if (!dev->driver) {
/* dev->driver may be null if we're being removed */
diff --git a/drivers/acpi/nfit/nfit.h b/drivers/acpi/nfit/nfit.h
index e894ded24d99..51d23f130d86 100644
--- a/drivers/acpi/nfit/nfit.h
+++ b/drivers/acpi/nfit/nfit.h
@@ -78,6 +78,10 @@ enum {
NFIT_ARS_TIMEOUT = 90,
};
+enum nfit_root_notifiers {
+ NFIT_NOTIFY_UPDATE = 0x80,
+};
+
struct nfit_spa {
struct list_head list;
struct nd_region *nd_region;