linux-kernel - [PATCH v6 9/9] tpm: cleanup of printk error messages

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Message-Id: <1479117656-12403-10-git-send-email-nayna@linux.vnet.ibm.com>
Date:   Mon, 14 Nov 2016 05:00:56 -0500
From:   Nayna Jain <nayna@...ux.vnet.ibm.com>
To:     tpmdd-devel@...ts.sourceforge.net
Cc:     peterhuewe@....de, tpmdd@...horst.net,
        jarkko.sakkinen@...ux.intel.com, jgunthorpe@...idianresearch.com,
        linux-kernel@...r.kernel.org,
        linux-security-module@...r.kernel.org,
        Nayna Jain <nayna@...ux.vnet.ibm.com>
Subject: [PATCH v6 9/9] tpm: cleanup of printk error messages

This patch removes the unnecessary error messages on failing to
allocate memory and replaces pr_err/printk with dev_dbg/dev_info
as applicable.

Suggested-by: Jason Gunthorpe <jgunthorpe@...idianresearch.com>
Signed-off-by: Nayna Jain <nayna@...ux.vnet.ibm.com>
---
 drivers/char/tpm/tpm_acpi.c | 16 ++++------------
 drivers/char/tpm/tpm_of.c   | 29 +++++++++--------------------
 2 files changed, 13 insertions(+), 32 deletions(-)

diff --git a/drivers/char/tpm/tpm_acpi.c b/drivers/char/tpm/tpm_acpi.c
index fa30c969..ddbaef2 100644
--- a/drivers/char/tpm/tpm_acpi.c
+++ b/drivers/char/tpm/tpm_acpi.c
@@ -60,11 +60,8 @@ int read_log_acpi(struct tpm_chip *chip)
 	status = acpi_get_table(ACPI_SIG_TCPA, 1,
 				(struct acpi_table_header **)&buff);
 
-	if (ACPI_FAILURE(status)) {
-		printk(KERN_ERR "%s: ERROR - Could not get TCPA table\n",
-		       __func__);
+	if (ACPI_FAILURE(status))
 		return -EIO;
-	}
 
 	switch(buff->platform_class) {
 	case BIOS_SERVER:
@@ -78,25 +75,20 @@ int read_log_acpi(struct tpm_chip *chip)
 		break;
 	}
 	if (!len) {
-		printk(KERN_ERR "%s: ERROR - TCPA log area empty\n", __func__);
+		dev_warn(&chip->dev, "%s: TCPA log area empty\n", __func__);
 		return -EIO;
 	}
 
 	/* malloc EventLog space */
 	log->bios_event_log = kmalloc(len, GFP_KERNEL);
-	if (!log->bios_event_log) {
-		printk("%s: ERROR - Not enough  Memory for BIOS measurements\n",
-			__func__);
+	if (!log->bios_event_log)
 		return -ENOMEM;
-	}
 
 	log->bios_event_log_end = log->bios_event_log + len;
 
 	virt = acpi_os_map_iomem(start, len);
-	if (!virt) {
-		printk("%s: ERROR - Unable to map memory\n", __func__);
+	if (!virt)
 		goto err;
-	}
 
 	memcpy_fromio(log->bios_event_log, virt, len);
 
diff --git a/drivers/char/tpm/tpm_of.c b/drivers/char/tpm/tpm_of.c
index 22b8f81..3af829f 100644
--- a/drivers/char/tpm/tpm_of.c
+++ b/drivers/char/tpm/tpm_of.c
@@ -31,40 +31,29 @@ int read_log_of(struct tpm_chip *chip)
 	log = &chip->log;
 	if (chip->dev.parent->of_node)
 		np = chip->dev.parent->of_node;
-	if (!np) {
-		pr_err("%s: ERROR - IBMVTPM not supported\n", __func__);
+	if (!np)
 		return -ENODEV;
-	}
 
 	sizep = of_get_property(np, "linux,sml-size", NULL);
-	if (sizep == NULL) {
-		pr_err("%s: ERROR - SML size not found\n", __func__);
-		goto cleanup_eio;
-	}
+	if (sizep == NULL)
+		return -EIO;
+
 	if (*sizep == 0) {
-		pr_err("%s: ERROR - event log area empty\n", __func__);
-		goto cleanup_eio;
+		dev_warn(&chip->dev, "%s: Event log area empty\n", __func__);
+		return -EIO;
 	}
 
 	basep = of_get_property(np, "linux,sml-base", NULL);
-	if (basep == NULL) {
-		pr_err("%s: ERROR - SML not found\n", __func__);
-		goto cleanup_eio;
-	}
+	if (basep == NULL)
+		return -EIO;
 
 	log->bios_event_log = kmalloc(*sizep, GFP_KERNEL);
-	if (!log->bios_event_log) {
-		pr_err("%s: ERROR - Not enough memory for BIOS measurements\n",
-		       __func__);
+	if (!log->bios_event_log)
 		return -ENOMEM;
-	}
 
 	log->bios_event_log_end = log->bios_event_log + *sizep;
 
 	memcpy(log->bios_event_log, __va(*basep), *sizep);
 
 	return 0;
-
-cleanup_eio:
-	return -EIO;
 }
-- 
2.5.0