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authorLorenzo Pieralisi <lorenzo.pieralisi@arm.com>2015-05-01 12:41:10 +0300
committerLee Jones <lee.jones@linaro.org>2015-06-22 14:25:17 +0300
commitec40c606c7aebb8d61cb47af27e2f62c26e09e29 (patch)
treeecd1c5d08f2ee8a83a757131d29832781516613f /drivers/mfd
parentb64610dfbdf6a21e92073d50fef33704dbfe6028 (diff)
downloadlinux-ec40c606c7aebb8d61cb47af27e2f62c26e09e29.tar.xz
mfd: Check ACPI device companion before checking resources
Current code in mfd-core calls into ACPI to check resources even on a system that booted with a DT (on kernels with both DT and ACPI support compiled in). This triggers ACPI exceptions since we may end up calling the ACPI interpreter when it has not been initialized: "ACPI Exception: AE_BAD_PARAMETER, Thread 2064154624 could not acquire Mutex [0x1] (20150410/utmutex-285)" This patch fixes the issues by adding a check for an ACPI companion device before carrying out ACPI resources checks to avoid calling the ACPI interpreter if the fwnode representing the device is an OF one. Cc: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers/mfd')
-rw-r--r--drivers/mfd/mfd-core.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c
index 1aed3b7b8d9b..14fd5cbcf0f2 100644
--- a/drivers/mfd/mfd-core.c
+++ b/drivers/mfd/mfd-core.c
@@ -207,9 +207,11 @@ static int mfd_add_device(struct device *parent, int id,
}
if (!cell->ignore_resource_conflicts) {
- ret = acpi_check_resource_conflict(&res[r]);
- if (ret)
- goto fail_alias;
+ if (has_acpi_companion(&pdev->dev)) {
+ ret = acpi_check_resource_conflict(&res[r]);
+ if (ret)
+ goto fail_alias;
+ }
}
}