* [PATCH 2/2] uevent: use add_uevent_var() instead of open coding it
2007-03-04 0:56 [PATCH 1/2] uevent: improve error checking and handling Eric Rannaud
@ 2007-03-04 1:00 ` Eric Rannaud
0 siblings, 0 replies; 2+ messages in thread
From: Eric Rannaud @ 2007-03-04 1:00 UTC (permalink / raw)
To: linux-kernel; +Cc: torvalds
Subject: uevent: use add_uevent_var() instead of open coding it
From: Eric Rannaud <eric.rannaud@gmail.com>
Make use of add_uevent_var() instead of (often incorrectly)
open coding it.
Signed-off-by: Eric Rannaud <eric.rannaud@gmail.com>
---
drivers/amba/bus.c | 13 +++---
drivers/ieee1394/nodemgr.c | 14 +++----
drivers/mmc/mmc_sysfs.c | 27 +++++-------
drivers/s390/crypto/ap_bus.c | 28 ++++++-------
net/core/net-sysfs.c | 17 ++-----
sound/aoa/soundbus/core.c | 79 ++++++++++++++---------------------
6 files changed, 59 insertions(+), 106 deletions(-)
diff --git a/drivers/amba/bus.c b/drivers/amba/bus.c
index fd54750..e0871b9 100644
--- a/drivers/amba/bus.c
+++ b/drivers/amba/bus.c
@@ -47,14 +47,13 @@ static int amba_match(struct device *dev, struct device_driver *drv)
static int amba_uevent(struct device *dev, char **envp, int nr_env, char *buf, int bufsz)
{
struct amba_device *pcdev = to_amba_device(dev);
+ int retval = 0, i = 0, len = 0;
- if (nr_env < 2)
- return -ENOMEM;
-
- snprintf(buf, bufsz, "AMBA_ID=%08x", pcdev->periphid);
- *envp++ = buf;
- *envp++ = NULL;
- return 0;
+ retval = add_uevent_var(envp, nr_env, &i,
+ buf, bufsize, &len,
+ "AMBA_ID=%08x", pcdev->periphid);
+ envp[i] = NULL;
+ return retval;
}
#else
#define amba_uevent NULL
diff --git a/drivers/ieee1394/nodemgr.c b/drivers/ieee1394/nodemgr.c
index c5ace19..1644e6f 100644
--- a/drivers/ieee1394/nodemgr.c
+++ b/drivers/ieee1394/nodemgr.c
@@ -1163,6 +1163,7 @@ static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
struct unit_directory *ud;
int i = 0;
int length = 0;
+ int retval = 0;
/* ieee1394:venNmoNspNverN */
char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1];
@@ -1176,14 +1177,11 @@ static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
#define PUT_ENVP(fmt,val) \
do { \
- int printed; \
- envp[i++] = buffer; \
- printed = snprintf(buffer, buffer_size - length, \
- fmt, val); \
- if ((buffer_size - (length+printed) <= 0) || (i >= num_envp)) \
- return -ENOMEM; \
- length += printed+1; \
- buffer += printed+1; \
+ retval = add_uevent_var(envp, num_envp, &i, \
+ buffer, buffer_size, &length, \
+ fmt, val); \
+ if (retval) \
+ return retval; \
} while (0)
PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id);
diff --git a/drivers/mmc/mmc_sysfs.c b/drivers/mmc/mmc_sysfs.c
index d32698b..e0e82d8 100644
--- a/drivers/mmc/mmc_sysfs.c
+++ b/drivers/mmc/mmc_sysfs.c
@@ -86,31 +86,26 @@ mmc_bus_uevent(struct device *dev, char **envp, int num_envp, char *buf,
{
struct mmc_card *card = dev_to_mmc_card(dev);
char ccc[13];
- int i = 0;
-
-#define add_env(fmt,val) \
- ({ \
- int len, ret = -ENOMEM; \
- if (i < num_envp) { \
- envp[i++] = buf; \
- len = snprintf(buf, buf_size, fmt, val) + 1; \
- buf_size -= len; \
- buf += len; \
- if (buf_size >= 0) \
- ret = 0; \
- } \
- ret; \
- })
+ int retval = 0, i = 0, length = 0;
+
+#define add_env(fmt,val) do { \
+ retval = add_uevent_var(envp, num_envp, &i, \
+ buf, buf_size, &length, \
+ fmt, val); \
+ if (retval) \
+ return retval; \
+} while (0);
for (i = 0; i < 12; i++)
ccc[i] = card->csd.cmdclass & (1 << i) ? '1' : '0';
ccc[12] = '\0';
- i = 0;
add_env("MMC_CCC=%s", ccc);
add_env("MMC_MANFID=%06x", card->cid.manfid);
add_env("MMC_NAME=%s", mmc_card_name(card));
add_env("MMC_OEMID=%04x", card->cid.oemid);
+#undef add_env
+ envp[i] = NULL;
return 0;
}
diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c
index c7d1355..7bbba9e 100644
--- a/drivers/s390/crypto/ap_bus.c
+++ b/drivers/s390/crypto/ap_bus.c
@@ -421,27 +421,25 @@ static int ap_uevent (struct device *dev, char **envp, int num_envp,
char *buffer, int buffer_size)
{
struct ap_device *ap_dev = to_ap_dev(dev);
- int length;
+ int retval = 0, length = 0, i = 0;
if (!ap_dev)
return -ENODEV;
/* Set up DEV_TYPE environment variable. */
- envp[0] = buffer;
- length = scnprintf(buffer, buffer_size, "DEV_TYPE=%04X",
- ap_dev->device_type);
- if (buffer_size - length <= 0)
- return -ENOMEM;
- buffer += length;
- buffer_size -= length;
+ retval = add_uevent_var(envp, num_envp, &i,
+ buffer, buffer_size, &length,
+ "DEV_TYPE=%04X", ap_dev->device_type);
+ if (retval)
+ return retval;
+
/* Add MODALIAS= */
- envp[1] = buffer;
- length = scnprintf(buffer, buffer_size, "MODALIAS=ap:t%02X",
- ap_dev->device_type);
- if (buffer_size - length <= 0)
- return -ENOMEM;
- envp[2] = NULL;
- return 0;
+ retval = add_uevent_var(envp, num_envp, &i,
+ buffer, buffer_size, &length,
+ "MODALIAS=ap:t%02X", ap_dev->device_type);
+
+ envp[i] = NULL;
+ return retval;
}
static struct bus_type ap_bus_type = {
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index 4cbb129..57ed29d 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -412,20 +412,13 @@ static int netdev_uevent(struct device *d, char **envp,
int num_envp, char *buf, int size)
{
struct net_device *dev = to_net_dev(d);
- int i = 0;
- int n;
-
- /* pass interface to uevent. */
- envp[i++] = buf;
- n = snprintf(buf, size, "INTERFACE=%s", dev->name) + 1;
- buf += n;
- size -= n;
-
- if ((size <= 0) || (i >= num_envp))
- return -ENOMEM;
+ int retval = 0, len = 0, i = 0;
+ retval = add_uevent_var(envp, num_envp, &i,
+ buf, size, &len,
+ "INTERFACE=%s", dev->name);
envp[i] = NULL;
- return 0;
+ return retval;
}
#endif
diff --git a/sound/aoa/soundbus/core.c b/sound/aoa/soundbus/core.c
index 47b3e37..aa62932 100644
--- a/sound/aoa/soundbus/core.c
+++ b/sound/aoa/soundbus/core.c
@@ -61,9 +61,9 @@ static int soundbus_uevent(struct device *dev, char **envp, int num_envp,
{
struct soundbus_dev * soundbus_dev;
struct of_device * of;
- char *scratch, *compat, *compat2;
- int i = 0;
- int length, cplen, cplen2, seen = 0;
+ char *compat;
+ int retval = 0, i = 0, length = 0;
+ int cplen, seen = 0;
if (!dev)
return -ENODEV;
@@ -75,63 +75,46 @@ static int soundbus_uevent(struct device *dev, char **envp, int num_envp,
of = &soundbus_dev->ofdev;
/* stuff we want to pass to /sbin/hotplug */
- envp[i++] = scratch = buffer;
- length = scnprintf (scratch, buffer_size, "OF_NAME=%s", of->node->name);
- ++length;
- buffer_size -= length;
- if ((buffer_size <= 0) || (i >= num_envp))
- return -ENOMEM;
- scratch += length;
-
- envp[i++] = scratch;
- length = scnprintf (scratch, buffer_size, "OF_TYPE=%s", of->node->type);
- ++length;
- buffer_size -= length;
- if ((buffer_size <= 0) || (i >= num_envp))
- return -ENOMEM;
- scratch += length;
+ retval = add_uevent_var(envp, num_env, &i,
+ buffer, buffer_size, &length,
+ "OF_NAME=%s", of->node->name);
+ if (retval)
+ return retval;
+
+ retval = add_uevent_var(envp, num_env, &i,
+ buffer, buffer_size, &length,
+ "OF_TYPE=%s", of->node->type);
+ if (retval)
+ return retval;
/* Since the compatible field can contain pretty much anything
* it's not really legal to split it out with commas. We split it
* up using a number of environment variables instead. */
compat = (char *) get_property(of->node, "compatible", &cplen);
- compat2 = compat;
- cplen2= cplen;
while (compat && cplen > 0) {
- envp[i++] = scratch;
- length = scnprintf (scratch, buffer_size,
- "OF_COMPATIBLE_%d=%s", seen, compat);
- ++length;
- buffer_size -= length;
- if ((buffer_size <= 0) || (i >= num_envp))
- return -ENOMEM;
- scratch += length;
- length = strlen (compat) + 1;
- compat += length;
- cplen -= length;
- seen++;
+ int tmp = length;
+ retval = add_uevent_var(envp, num_env, &i,
+ buffer, buffer_size, &length,
+ "OF_COMPATIBLE_%d=%s", seen, compat);
+ if (retval)
+ return retval;
+ compat += length - tmp;
+ cplen -= length - tmp;
}
- envp[i++] = scratch;
- length = scnprintf (scratch, buffer_size, "OF_COMPATIBLE_N=%d", seen);
- ++length;
- buffer_size -= length;
- if ((buffer_size <= 0) || (i >= num_envp))
- return -ENOMEM;
- scratch += length;
-
- envp[i++] = scratch;
- length = scnprintf (scratch, buffer_size, "MODALIAS=%s",
- soundbus_dev->modalias);
-
- buffer_size -= length;
- if ((buffer_size <= 0) || (i >= num_envp))
- return -ENOMEM;
+ retval = add_uevent_var(envp, num_env, &i,
+ buffer, buffer_size, &length,
+ "OF_COMPATIBLE_N=%d", seen);
+ if (retval)
+ return retval;
+ retval = add_uevent_var(envp, num_env, &i,
+ buffer, buffer_size, &length,
+ "MODALIAS=%s", soundbus_dev->modalias);
envp[i] = NULL;
- return 0;
+ return retval;
}
static int soundbus_device_remove(struct device *dev)
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