Merge branch 'pstore' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux

* 'pstore' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux:
  pstore: make pstore write function return normal success/fail value
  pstore: change mutex locking to spin_locks
  pstore: defer inserting OOPS entries into pstore

2 files changed, 17 insertions, 14 deletions

diff --git a/drivers/acpi/apei/erst.c b/drivers/acpi/apei/erst.c
index 2ca59dc69f7..127408069ca 100644
--- a/drivers/acpi/apei/erst.c
+++ b/drivers/acpi/apei/erst.c
@@ -933,7 +933,7 @@ static int erst_open_pstore(struct pstore_info *psi);
 static int erst_close_pstore(struct pstore_info *psi);
 static ssize_t erst_reader(u64 *id, enum pstore_type_id *type,
                            struct timespec *time, struct pstore_info *psi);
-static u64 erst_writer(enum pstore_type_id type, unsigned int part,
+static int erst_writer(enum pstore_type_id type, u64 *id, unsigned int part,
                        size_t size, struct pstore_info *psi);
 static int erst_clearer(enum pstore_type_id type, u64 id,
                         struct pstore_info *psi);
@@ -1040,11 +1040,12 @@ out:
         return (rc < 0) ? rc : (len - sizeof(*rcd));
 }
 
-static u64 erst_writer(enum pstore_type_id type, unsigned int part,
+static int erst_writer(enum pstore_type_id type, u64 *id, unsigned int part,
                        size_t size, struct pstore_info *psi)
 {
         struct cper_pstore_record *rcd = (struct cper_pstore_record *)
                                         (erst_info.buf - sizeof(*rcd));
+        int ret;
 
         memset(rcd, 0, sizeof(*rcd));
         memcpy(rcd->hdr.signature, CPER_SIG_RECORD, CPER_SIG_SIZE);
@@ -1079,9 +1080,10 @@ static u64 erst_writer(enum pstore_type_id type, unsigned int part,
         }
         rcd->sec_hdr.section_severity = CPER_SEV_FATAL;
 
-        erst_write(&rcd->hdr);
+        ret = erst_write(&rcd->hdr);
+        *id = rcd->hdr.record_id;
 
-        return rcd->hdr.record_id;
+        return ret;
 }
 
 static int erst_clearer(enum pstore_type_id type, u64 id,
@@ -1165,7 +1167,7 @@ static int __init erst_init(void)
                 goto err_release_erange;
 
         buf = kmalloc(erst_erange.size, GFP_KERNEL);
-        mutex_init(&erst_info.buf_mutex);
+        spin_lock_init(&erst_info.buf_lock);
         if (buf) {
                 erst_info.buf = buf + sizeof(struct cper_pstore_record);
                 erst_info.bufsize = erst_erange.size -
diff --git a/drivers/firmware/efivars.c b/drivers/firmware/efivars.c
index eb80b549ed8..8370f72d87f 100644
--- a/drivers/firmware/efivars.c
+++ b/drivers/firmware/efivars.c
@@ -490,8 +490,8 @@ static ssize_t efi_pstore_read(u64 *id, enum pstore_type_id *type,
         return 0;
 }
 
-static u64 efi_pstore_write(enum pstore_type_id type, unsigned int part,
-                            size_t size, struct pstore_info *psi)
+static int efi_pstore_write(enum pstore_type_id type, u64 *id,
+                unsigned int part, size_t size, struct pstore_info *psi)
 {
         char name[DUMP_NAME_LEN];
         char stub_name[DUMP_NAME_LEN];
@@ -499,7 +499,7 @@ static u64 efi_pstore_write(enum pstore_type_id type, unsigned int part,
         efi_guid_t vendor = LINUX_EFI_CRASH_GUID;
         struct efivars *efivars = psi->data;
         struct efivar_entry *entry, *found = NULL;
-        int i;
+        int i, ret = 0;
 
         sprintf(stub_name, "dump-type%u-%u-", type, part);
         sprintf(name, "%s%lu", stub_name, get_seconds());
@@ -548,18 +548,19 @@ static u64 efi_pstore_write(enum pstore_type_id type, unsigned int part,
                 efivar_unregister(found);
 
         if (size)
-                efivar_create_sysfs_entry(efivars,
+                ret = efivar_create_sysfs_entry(efivars,
                                           utf16_strsize(efi_name,
                                                         DUMP_NAME_LEN * 2),
                                           efi_name, &vendor);
 
-        return part;
+        *id = part;
+        return ret;
 };
 
 static int efi_pstore_erase(enum pstore_type_id type, u64 id,
                             struct pstore_info *psi)
 {
-        efi_pstore_write(type, id, 0, psi);
+        efi_pstore_write(type, &id, (unsigned int)id, 0, psi);
 
         return 0;
 }
@@ -580,8 +581,8 @@ static ssize_t efi_pstore_read(u64 *id, enum pstore_type_id *type,
         return -1;
 }
 
-static u64 efi_pstore_write(enum pstore_type_id type, unsigned int part,
-                            size_t size, struct pstore_info *psi)
+static int efi_pstore_write(enum pstore_type_id type, u64 *id,
+                unsigned int part, size_t size, struct pstore_info *psi)
 {
         return 0;
 }
@@ -978,7 +979,7 @@ int register_efivars(struct efivars *efivars,
         if (efivars->efi_pstore_info.buf) {
                 efivars->efi_pstore_info.bufsize = 1024;
                 efivars->efi_pstore_info.data = efivars;
-                mutex_init(&efivars->efi_pstore_info.buf_mutex);
+                spin_lock_init(&efivars->efi_pstore_info.buf_lock);
                 pstore_register(&efivars->efi_pstore_info);
         }