linux-kernel - [PATCH 2/2] x86: intel-mid: sfi_handle_*_dev() should check for pdata error code

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Date:	Thu, 19 Dec 2013 21:42:59 -0800
From:	David Cohen <david.a.cohen@...ux.intel.com>
To:	tglx@...utronix.de, mingo@...hat.com, hpa@...or.com, x86@...nel.org
Cc:	linux-kernel@...r.kernel.org,
	David Cohen <david.a.cohen@...ux.intel.com>
Subject: [PATCH 2/2] x86: intel-mid: sfi_handle_*_dev() should check for pdata error code

Prevent sfi_handle_*_dev() to register device in case
intel_mid_sfi_get_pdata() failed to execute.

Since 'NULL' is a valid return value, this patch makes
sfi_handle_*_dev() functions to use IS_ERR() to validate returned pdata.

Signed-off-by: David Cohen <david.a.cohen@...ux.intel.com>
---
 arch/x86/platform/intel-mid/sfi.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/x86/platform/intel-mid/sfi.c b/arch/x86/platform/intel-mid/sfi.c
index c67b9a2f48a1..438306ebed05 100644
--- a/arch/x86/platform/intel-mid/sfi.c
+++ b/arch/x86/platform/intel-mid/sfi.c
@@ -337,6 +337,8 @@ static void __init sfi_handle_ipc_dev(struct sfi_device_table_entry *pentry,
 	pr_debug("IPC bus, name = %16.16s, irq = 0x%2x\n",
 		pentry->name, pentry->irq);
 	pdata = intel_mid_sfi_get_pdata(dev, pentry);
+	if (IS_ERR(pdata))
+		return;
 
 	pdev = platform_device_alloc(pentry->name, 0);
 	if (pdev == NULL) {
@@ -370,6 +372,8 @@ static void __init sfi_handle_spi_dev(struct sfi_device_table_entry *pentry,
 		spi_info.chip_select);
 
 	pdata = intel_mid_sfi_get_pdata(dev, &spi_info);
+	if (IS_ERR(pdata))
+		return;
 
 	spi_info.platform_data = pdata;
 	if (dev->delay)
@@ -395,6 +399,8 @@ static void __init sfi_handle_i2c_dev(struct sfi_device_table_entry *pentry,
 		i2c_info.addr);
 	pdata = intel_mid_sfi_get_pdata(dev, &i2c_info);
 	i2c_info.platform_data = pdata;
+	if (IS_ERR(pdata))
+		return;
 
 	if (dev->delay)
 		intel_scu_i2c_device_register(pentry->host_num, &i2c_info);
-- 
1.8.4.2

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