From 183d020258dfd08178a05c6793dae10409db8abb Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Mon, 7 Nov 2005 14:29:02 +1100 Subject: [PATCH] ppc64: SMU partition recovery This patch adds the ability to the SMU driver to recover missing calibration partitions from the SMU chip itself. It also adds some dynamic mecanism to /proc/device-tree so that new properties are visible to userland. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Paul Mackerras --- fs/proc/proc_devtree.c | 57 +++++++++++++++++++++++++++++++------------------- 1 file changed, 35 insertions(+), 22 deletions(-) (limited to 'fs/proc/proc_devtree.c') diff --git a/fs/proc/proc_devtree.c b/fs/proc/proc_devtree.c index 6fd57f15419..fb117b74809 100644 --- a/fs/proc/proc_devtree.c +++ b/fs/proc/proc_devtree.c @@ -48,6 +48,39 @@ static int property_read_proc(char *page, char **start, off_t off, * and "@10" to it. */ +/* + * Add a property to a node + */ +static struct proc_dir_entry * +__proc_device_tree_add_prop(struct proc_dir_entry *de, struct property *pp) +{ + struct proc_dir_entry *ent; + + /* + * Unfortunately proc_register puts each new entry + * at the beginning of the list. So we rearrange them. + */ + ent = create_proc_read_entry(pp->name, + strncmp(pp->name, "security-", 9) + ? S_IRUGO : S_IRUSR, de, + property_read_proc, pp); + if (ent == NULL) + return NULL; + + if (!strncmp(pp->name, "security-", 9)) + ent->size = 0; /* don't leak number of password chars */ + else + ent->size = pp->length; + + return ent; +} + + +void proc_device_tree_add_prop(struct proc_dir_entry *pde, struct property *prop) +{ + __proc_device_tree_add_prop(pde, prop); +} + /* * Process a node, adding entries for its children and its properties. */ @@ -57,11 +90,9 @@ void proc_device_tree_add_node(struct device_node *np, struct property *pp; struct proc_dir_entry *ent; struct device_node *child; - struct proc_dir_entry *list = NULL, **lastp; const char *p; set_node_proc_entry(np, de); - lastp = &list; for (child = NULL; (child = of_get_next_child(np, child));) { p = strrchr(child->full_name, '/'); if (!p) @@ -71,9 +102,6 @@ void proc_device_tree_add_node(struct device_node *np, ent = proc_mkdir(p, de); if (ent == 0) break; - *lastp = ent; - ent->next = NULL; - lastp = &ent->next; proc_device_tree_add_node(child, ent); } of_node_put(child); @@ -84,7 +112,7 @@ void proc_device_tree_add_node(struct device_node *np, * properties are quite unimportant for us though, thus we * simply "skip" them here, but we do have to check. */ - for (ent = list; ent != NULL; ent = ent->next) + for (ent = de->subdir; ent != NULL; ent = ent->next) if (!strcmp(ent->name, pp->name)) break; if (ent != NULL) { @@ -94,25 +122,10 @@ void proc_device_tree_add_node(struct device_node *np, continue; } - /* - * Unfortunately proc_register puts each new entry - * at the beginning of the list. So we rearrange them. - */ - ent = create_proc_read_entry(pp->name, - strncmp(pp->name, "security-", 9) - ? S_IRUGO : S_IRUSR, de, - property_read_proc, pp); + ent = __proc_device_tree_add_prop(de, pp); if (ent == 0) break; - if (!strncmp(pp->name, "security-", 9)) - ent->size = 0; /* don't leak number of password chars */ - else - ent->size = pp->length; - ent->next = NULL; - *lastp = ent; - lastp = &ent->next; } - de->subdir = list; } /* -- cgit v1.2.3