Source

hgbook / fr / examples / data / remove-redundant-null-checks.patch

From: Jesper Juhl <jesper.juhl@gmail.com>

Remove redundant NULL chck before kfree + tiny CodingStyle cleanup for
drivers/

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 drivers/char/agp/sgi-agp.c        |    5 ++---
 drivers/char/hvcs.c               |   11 +++++------
 drivers/message/fusion/mptfc.c    |    6 ++----
 drivers/message/fusion/mptsas.c   |    3 +--
 drivers/net/fs_enet/fs_enet-mii.c |    3 +--
 drivers/net/wireless/ipw2200.c    |   22 ++++++----------------
 drivers/scsi/libata-scsi.c        |    4 +---
 drivers/video/au1100fb.c          |    3 +--
 8 files changed, 19 insertions(+), 38 deletions(-)

diff -puN drivers/char/agp/sgi-agp.c~remove-redundant-null-checks-before-free-in-drivers drivers/char/agp/sgi-agp.c
--- a/drivers/char/agp/sgi-agp.c~remove-redundant-null-checks-before-free-in-drivers
+++ a/drivers/char/agp/sgi-agp.c
@@ -329,9 +329,8 @@ static int __devinit agp_sgi_init(void)
 
 static void __devexit agp_sgi_cleanup(void)
 {
-	if (sgi_tioca_agp_bridges)
-		kfree(sgi_tioca_agp_bridges);
-	sgi_tioca_agp_bridges=NULL;
+	kfree(sgi_tioca_agp_bridges);
+	sgi_tioca_agp_bridges = NULL;
 }
 
 module_init(agp_sgi_init);
diff -puN drivers/char/hvcs.c~remove-redundant-null-checks-before-free-in-drivers drivers/char/hvcs.c
--- a/drivers/char/hvcs.c~remove-redundant-null-checks-before-free-in-drivers
+++ a/drivers/char/hvcs.c
@@ -1320,11 +1320,12 @@ static struct tty_operations hvcs_ops = 
 static int hvcs_alloc_index_list(int n)
 {
 	int i;
+
 	hvcs_index_list = kmalloc(n * sizeof(hvcs_index_count),GFP_KERNEL);
 	if (!hvcs_index_list)
 		return -ENOMEM;
 	hvcs_index_count = n;
-	for(i = 0; i < hvcs_index_count; i++)
+	for (i = 0; i < hvcs_index_count; i++)
 		hvcs_index_list[i] = -1;
 	return 0;
 }
@@ -1332,11 +1333,9 @@ static int hvcs_alloc_index_list(int n)
 static void hvcs_free_index_list(void)
 {
 	/* Paranoia check to be thorough. */
-	if (hvcs_index_list) {
-		kfree(hvcs_index_list);
-		hvcs_index_list = NULL;
-		hvcs_index_count = 0;
-	}
+	kfree(hvcs_index_list);
+	hvcs_index_list = NULL;
+	hvcs_index_count = 0;
 }
 
 static int __init hvcs_module_init(void)
diff -puN drivers/message/fusion/mptfc.c~remove-redundant-null-checks-before-free-in-drivers drivers/message/fusion/mptfc.c
--- a/drivers/message/fusion/mptfc.c~remove-redundant-null-checks-before-free-in-drivers
+++ a/drivers/message/fusion/mptfc.c
@@ -305,10 +305,8 @@ mptfc_GetFcDevPage0(MPT_ADAPTER *ioc, in
 	}
 
  out:
-	if (pp0_array)
-		kfree(pp0_array);
-	if (p0_array)
-		kfree(p0_array);
+	kfree(pp0_array);
+	kfree(p0_array);
 	return rc;
 }
 
diff -puN drivers/message/fusion/mptsas.c~remove-redundant-null-checks-before-free-in-drivers drivers/message/fusion/mptsas.c
--- a/drivers/message/fusion/mptsas.c~remove-redundant-null-checks-before-free-in-drivers
+++ a/drivers/message/fusion/mptsas.c
@@ -1378,8 +1378,7 @@ mptsas_probe_hba_phys(MPT_ADAPTER *ioc)
 	return 0;
 
  out_free_port_info:
-	if (hba)
-		kfree(hba);
+	kfree(hba);
  out:
 	return error;
 }
diff -puN drivers/net/fs_enet/fs_enet-mii.c~remove-redundant-null-checks-before-free-in-drivers drivers/net/fs_enet/fs_enet-mii.c
--- a/drivers/net/fs_enet/fs_enet-mii.c~remove-redundant-null-checks-before-free-in-drivers
+++ a/drivers/net/fs_enet/fs_enet-mii.c
@@ -431,8 +431,7 @@ static struct fs_enet_mii_bus *create_bu
 	return bus;
 
 err:
-	if (bus)
-		kfree(bus);
+	kfree(bus);
 	return ERR_PTR(ret);
 }
 
diff -puN drivers/net/wireless/ipw2200.c~remove-redundant-null-checks-before-free-in-drivers drivers/net/wireless/ipw2200.c
--- a/drivers/net/wireless/ipw2200.c~remove-redundant-null-checks-before-free-in-drivers
+++ a/drivers/net/wireless/ipw2200.c
@@ -1229,12 +1229,6 @@ static struct ipw_fw_error *ipw_alloc_er
 	return error;
 }
 
-static void ipw_free_error_log(struct ipw_fw_error *error)
-{
-	if (error)
-		kfree(error);
-}
-
 static ssize_t show_event_log(struct device *d,
 			      struct device_attribute *attr, char *buf)
 {
@@ -1296,10 +1290,9 @@ static ssize_t clear_error(struct device
 			   const char *buf, size_t count)
 {
 	struct ipw_priv *priv = dev_get_drvdata(d);
-	if (priv->error) {
-		ipw_free_error_log(priv->error);
-		priv->error = NULL;
-	}
+
+	kfree(priv->error);
+	priv->error = NULL;
 	return count;
 }
 
@@ -1970,8 +1963,7 @@ static void ipw_irq_tasklet(struct ipw_p
 				struct ipw_fw_error *error =
 				    ipw_alloc_error_log(priv);
 				ipw_dump_error_log(priv, error);
-				if (error)
-					ipw_free_error_log(error);
+				kfree(error);
 			}
 #endif
 		} else {
@@ -11693,10 +11685,8 @@ static void ipw_pci_remove(struct pci_de
 		}
 	}
 
-	if (priv->error) {
-		ipw_free_error_log(priv->error);
-		priv->error = NULL;
-	}
+	kfree(priv->error);
+	priv->error = NULL;
 
 #ifdef CONFIG_IPW2200_PROMISCUOUS
 	ipw_prom_free(priv);
diff -puN drivers/scsi/libata-scsi.c~remove-redundant-null-checks-before-free-in-drivers drivers/scsi/libata-scsi.c
--- a/drivers/scsi/libata-scsi.c~remove-redundant-null-checks-before-free-in-drivers
+++ a/drivers/scsi/libata-scsi.c
@@ -222,9 +222,7 @@ int ata_cmd_ioctl(struct scsi_device *sc
 	 && copy_to_user(arg + sizeof(args), argbuf, argsize))
 		rc = -EFAULT;
 error:
-	if (argbuf)
-		kfree(argbuf);
-
+	kfree(argbuf);
 	return rc;
 }
 
diff -puN drivers/video/au1100fb.c~remove-redundant-null-checks-before-free-in-drivers drivers/video/au1100fb.c
--- a/drivers/video/au1100fb.c~remove-redundant-null-checks-before-free-in-drivers
+++ a/drivers/video/au1100fb.c
@@ -743,8 +743,7 @@ void __exit au1100fb_cleanup(void)
 {
 	driver_unregister(&au1100fb_driver);
 
-	if (drv_info.opt_mode)
-		kfree(drv_info.opt_mode);
+	kfree(drv_info.opt_mode);
 }
 
 module_init(au1100fb_init);
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