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authorOlaf Hering <olh@suse.de>2006-02-01 03:05:58 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-02-01 08:53:19 -0800
commite61997881e0402aedbfad8696e369568a0583f14 (patch)
tree2b66d348024b41c22966c386f3ca6647a9efdb00 /drivers/macintosh
parent39931e41becd6abeb2014747369d8b6392f5dbac (diff)
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[PATCH] MODALIAS= for macio
Prodive a MODALIAS= enviroment variable for devices on the mac-io bus. Change the buffer length counter to not waste memory by advancing the pointer for the next string too far. Tested on an ibook1 with modular pmac_zilog. Signed-off-by: Olaf Hering <olh@suse.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/macintosh')
-rw-r--r--drivers/macintosh/macio_asic.c72
1 files changed, 48 insertions, 24 deletions
diff --git a/drivers/macintosh/macio_asic.c b/drivers/macintosh/macio_asic.c
index ed6d3174d660..69596f6438e9 100644
--- a/drivers/macintosh/macio_asic.c
+++ b/drivers/macintosh/macio_asic.c
@@ -140,10 +140,9 @@ static int macio_uevent(struct device *dev, char **envp, int num_envp,
{
struct macio_dev * macio_dev;
struct of_device * of;
- char *scratch, *compat;
+ char *scratch, *compat, *compat2;
int i = 0;
- int length = 0;
- int cplen, seen = 0;
+ int length, cplen, cplen2, seen = 0;
if (!dev)
return -ENODEV;
@@ -153,23 +152,22 @@ static int macio_uevent(struct device *dev, char **envp, int num_envp,
return -ENODEV;
of = &macio_dev->ofdev;
- scratch = buffer;
/* stuff we want to pass to /sbin/hotplug */
- envp[i++] = scratch;
- length += scnprintf (scratch, buffer_size - length, "OF_NAME=%s",
- of->node->name);
- if ((buffer_size - length <= 0) || (i >= num_envp))
- return -ENOMEM;
+ 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 - length, "OF_TYPE=%s",
- of->node->type);
- if ((buffer_size - length <= 0) || (i >= num_envp))
- return -ENOMEM;
+ 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;
/* Since the compatible field can contain pretty much anything
@@ -177,29 +175,55 @@ static int macio_uevent(struct device *dev, char **envp, int num_envp,
* up using a number of environment variables instead. */
compat = (char *) get_property(of->node, "compatible", &cplen);
+ compat2 = compat;
+ cplen2= cplen;
while (compat && cplen > 0) {
- int l;
envp[i++] = scratch;
- length += scnprintf (scratch, buffer_size - length,
+ length = scnprintf (scratch, buffer_size,
"OF_COMPATIBLE_%d=%s", seen, compat);
- if ((buffer_size - length <= 0) || (i >= num_envp))
+ ++length;
+ buffer_size -= length;
+ if ((buffer_size <= 0) || (i >= num_envp))
return -ENOMEM;
- length++;
scratch += length;
- l = strlen (compat) + 1;
- compat += l;
- cplen -= l;
+ length = strlen (compat) + 1;
+ compat += length;
+ cplen -= length;
seen++;
}
envp[i++] = scratch;
- length += scnprintf (scratch, buffer_size - length,
- "OF_COMPATIBLE_N=%d", seen);
- if ((buffer_size - length <= 0) || (i >= num_envp))
- return -ENOMEM;
+ 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=of:N%sT%s",
+ of->node->name, of->node->type);
+ /* overwrite '\0' */
+ buffer_size -= length;
+ if ((buffer_size <= 0) || (i >= num_envp))
+ return -ENOMEM;
scratch += length;
+ if (!compat2) {
+ compat2 = "";
+ cplen2 = 1;
+ }
+ while (cplen2 > 0) {
+ length = snprintf (scratch, buffer_size, "C%s", compat2);
+ buffer_size -= length;
+ if (buffer_size <= 0)
+ return -ENOMEM;
+ scratch += length;
+ length = strlen (compat2) + 1;
+ compat2 += length;
+ cplen2 -= length;
+ }
+
envp[i] = NULL;
return 0;