linux-kernel - [PATCH 02/14] platform/x86/intel/ifs: Propagate load failure error code

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Date:   Fri, 21 Oct 2022 13:34:01 -0700
From:   Jithu Joseph <jithu.joseph@...el.com>
To:     hdegoede@...hat.com, markgross@...nel.org
Cc:     tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
        dave.hansen@...ux.intel.com, x86@...nel.org, hpa@...or.com,
        gregkh@...uxfoundation.org, jithu.joseph@...el.com,
        ashok.raj@...el.com, tony.luck@...el.com,
        linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org,
        patches@...ts.linux.dev, ravi.v.shankar@...el.com,
        thiago.macieira@...el.com, athenas.jimenez.gonzalez@...el.com
Subject: [PATCH 02/14] platform/x86/intel/ifs: Propagate load failure error code

Existing implementation was returning fixed error code to user space
regardless of the load failure encountered.

Modify this to propagate the actual error code to user space.

Reviewed-by: Tony Luck <tony.luck@...el.com>
Signed-off-by: Jithu Joseph <jithu.joseph@...el.com>
---
 drivers/platform/x86/intel/ifs/ifs.h   | 2 +-
 drivers/platform/x86/intel/ifs/load.c  | 4 +++-
 drivers/platform/x86/intel/ifs/sysfs.c | 7 +++----
 3 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/platform/x86/intel/ifs/ifs.h b/drivers/platform/x86/intel/ifs/ifs.h
index 73c8e91cf144..782bcc039ddb 100644
--- a/drivers/platform/x86/intel/ifs/ifs.h
+++ b/drivers/platform/x86/intel/ifs/ifs.h
@@ -225,7 +225,7 @@ static inline struct ifs_data *ifs_get_data(struct device *dev)
 	return &d->data;
 }
 
-void ifs_load_firmware(struct device *dev);
+int ifs_load_firmware(struct device *dev);
 int do_core_test(int cpu, struct device *dev);
 const struct attribute_group **ifs_get_groups(void);
 
diff --git a/drivers/platform/x86/intel/ifs/load.c b/drivers/platform/x86/intel/ifs/load.c
index d056617ddc85..ebaa1d6a2b18 100644
--- a/drivers/platform/x86/intel/ifs/load.c
+++ b/drivers/platform/x86/intel/ifs/load.c
@@ -234,7 +234,7 @@ static bool ifs_image_sanity_check(struct device *dev, const struct microcode_he
  * Load ifs image. Before loading ifs module, the ifs image must be located
  * in /lib/firmware/intel/ifs and named as {family/model/stepping}.{testname}.
  */
-void ifs_load_firmware(struct device *dev)
+int ifs_load_firmware(struct device *dev)
 {
 	struct ifs_data *ifsd = ifs_get_data(dev);
 	const struct firmware *fw;
@@ -263,4 +263,6 @@ void ifs_load_firmware(struct device *dev)
 	release_firmware(fw);
 done:
 	ifsd->loaded = (ret == 0);
+
+	return ret;
 }
diff --git a/drivers/platform/x86/intel/ifs/sysfs.c b/drivers/platform/x86/intel/ifs/sysfs.c
index 37d8380d6fa8..4af4e1bea98d 100644
--- a/drivers/platform/x86/intel/ifs/sysfs.c
+++ b/drivers/platform/x86/intel/ifs/sysfs.c
@@ -94,9 +94,8 @@ static ssize_t reload_store(struct device *dev,
 			    struct device_attribute *attr,
 			    const char *buf, size_t count)
 {
-	struct ifs_data *ifsd = ifs_get_data(dev);
 	bool res;
-
+	int rc;
 
 	if (kstrtobool(buf, &res))
 		return -EINVAL;
@@ -106,11 +105,11 @@ static ssize_t reload_store(struct device *dev,
 	if (down_interruptible(&ifs_sem))
 		return -EINTR;
 
-	ifs_load_firmware(dev);
+	rc = ifs_load_firmware(dev);
 
 	up(&ifs_sem);
 
-	return ifsd->loaded ? count : -ENODEV;
+	return (rc == 0) ? count : rc;
 }
 
 static DEVICE_ATTR_WO(reload);
-- 
2.25.1