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pstore: Improve register_pstore() error reporting

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Uncommon errors are better to get reported to dmesg so developers can
more easily figure out why pstore is unhappy with a backend attempting
to register.

Signed-off-by: Kees Cook <keescook@chromium.org>
This commit is contained in:
Kees Cook 2017-03-03 12:11:40 -08:00
parent 1344dd86f3
commit 0d7cd09a3d
1 changed files with 5 additions and 1 deletions
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6
fs/pstore/platform.c
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@ -673,11 +673,15 @@ int pstore_register(struct pstore_info *psi)
{ {
struct module *owner = psi->owner; struct module *owner = psi->owner;
if (backend && strcmp(backend, psi->name)) if (backend && strcmp(backend, psi->name)) {
pr_warn("ignoring unexpected backend '%s'\n", psi->name);
return -EPERM; return -EPERM;
}
spin_lock(&pstore_lock); spin_lock(&pstore_lock);
if (psinfo) { if (psinfo) {
pr_warn("backend '%s' already loaded: ignoring '%s'\n",
psinfo->name, psi->name);
spin_unlock(&pstore_lock); spin_unlock(&pstore_lock);
return -EBUSY; return -EBUSY;
} }