memstick: fix MSProHG 8-bit interface mode support

[pandora-kernel.git] / drivers / s390 / char / sclp_cpi_sys.c

diff --git a/drivers/s390/char/sclp_cpi_sys.c b/drivers/s390/char/sclp_cpi_sys.c
index 9f37456..d887bd2 100644 (file)
--- a/drivers/s390/char/sclp_cpi_sys.c
+++ b/drivers/s390/char/sclp_cpi_sys.c
@@ -27,6 +27,8 @@
 #define CPI_LENGTH_NAME 8
 #define CPI_LENGTH_LEVEL 16
 
+static DEFINE_MUTEX(sclp_cpi_mutex);
+
 struct cpi_evbuf {
        struct evbuf_header header;
        u8      id_format;
@@ -124,21 +126,15 @@ static int cpi_req(void)
        int response;
 
        rc = sclp_register(&sclp_cpi_event);
-       if (rc) {
-               printk(KERN_WARNING "cpi: could not register "
-                       "to hardware console.\n");
+       if (rc)
                goto out;
-       }
        if (!(sclp_cpi_event.sclp_receive_mask & EVTYP_CTLPROGIDENT_MASK)) {
-               printk(KERN_WARNING "cpi: no control program "
-                       "identification support\n");
                rc = -EOPNOTSUPP;
                goto out_unregister;
        }
 
        req = cpi_prepare_req();
        if (IS_ERR(req)) {
-               printk(KERN_WARNING "cpi: could not allocate request\n");
                rc = PTR_ERR(req);
                goto out_unregister;
        }
@@ -148,10 +144,8 @@ static int cpi_req(void)
 
        /* Add request to sclp queue */
        rc = sclp_add_request(req);
-       if (rc) {
-               printk(KERN_WARNING "cpi: could not start request\n");
+       if (rc)
                goto out_free_req;
-       }
 
        wait_for_completion(&completion);
 
@@ -223,7 +217,12 @@ static void set_string(char *attr, const char *value)
 static ssize_t system_name_show(struct kobject *kobj,
                                struct kobj_attribute *attr, char *page)
 {
-       return snprintf(page, PAGE_SIZE, "%s\n", system_name);
+       int rc;
+
+       mutex_lock(&sclp_cpi_mutex);
+       rc = snprintf(page, PAGE_SIZE, "%s\n", system_name);
+       mutex_unlock(&sclp_cpi_mutex);
+       return rc;
 }
 
 static ssize_t system_name_store(struct kobject *kobj,
@@ -237,7 +236,9 @@ static ssize_t system_name_store(struct kobject *kobj,
        if (rc)
                return rc;
 
+       mutex_lock(&sclp_cpi_mutex);
        set_string(system_name, buf);
+       mutex_unlock(&sclp_cpi_mutex);
 
        return len;
 }
@@ -248,7 +249,12 @@ static struct kobj_attribute system_name_attr =
 static ssize_t sysplex_name_show(struct kobject *kobj,
                                 struct kobj_attribute *attr, char *page)
 {
-       return snprintf(page, PAGE_SIZE, "%s\n", sysplex_name);
+       int rc;
+
+       mutex_lock(&sclp_cpi_mutex);
+       rc = snprintf(page, PAGE_SIZE, "%s\n", sysplex_name);
+       mutex_unlock(&sclp_cpi_mutex);
+       return rc;
 }
 
 static ssize_t sysplex_name_store(struct kobject *kobj,
@@ -262,7 +268,9 @@ static ssize_t sysplex_name_store(struct kobject *kobj,
        if (rc)
                return rc;
 
+       mutex_lock(&sclp_cpi_mutex);
        set_string(sysplex_name, buf);
+       mutex_unlock(&sclp_cpi_mutex);
 
        return len;
 }
@@ -273,7 +281,12 @@ static struct kobj_attribute sysplex_name_attr =
 static ssize_t system_type_show(struct kobject *kobj,
                                struct kobj_attribute *attr, char *page)
 {
-       return snprintf(page, PAGE_SIZE, "%s\n", system_type);
+       int rc;
+
+       mutex_lock(&sclp_cpi_mutex);
+       rc = snprintf(page, PAGE_SIZE, "%s\n", system_type);
+       mutex_unlock(&sclp_cpi_mutex);
+       return rc;
 }
 
 static ssize_t system_type_store(struct kobject *kobj,
@@ -287,7 +300,9 @@ static ssize_t system_type_store(struct kobject *kobj,
        if (rc)
                return rc;
 
+       mutex_lock(&sclp_cpi_mutex);
        set_string(system_type, buf);
+       mutex_unlock(&sclp_cpi_mutex);
 
        return len;
 }
@@ -298,8 +313,11 @@ static struct kobj_attribute system_type_attr =
 static ssize_t system_level_show(struct kobject *kobj,
                                 struct kobj_attribute *attr, char *page)
 {
-       unsigned long long level = system_level;
+       unsigned long long level;
 
+       mutex_lock(&sclp_cpi_mutex);
+       level = system_level;
+       mutex_unlock(&sclp_cpi_mutex);
        return snprintf(page, PAGE_SIZE, "%#018llx\n", level);
 }
 
@@ -320,8 +338,9 @@ static ssize_t system_level_store(struct kobject *kobj,
        if (*endp)
                return -EINVAL;
 
+       mutex_lock(&sclp_cpi_mutex);
        system_level = level;
-
+       mutex_unlock(&sclp_cpi_mutex);
        return len;
 }
 
@@ -334,7 +353,9 @@ static ssize_t set_store(struct kobject *kobj,
 {
        int rc;
 
+       mutex_lock(&sclp_cpi_mutex);
        rc = cpi_req();
+       mutex_unlock(&sclp_cpi_mutex);
        if (rc)
                return rc;
 
@@ -373,12 +394,16 @@ int sclp_cpi_set_data(const char *system, const char *sysplex, const char *type,
        if (rc)
                return rc;
 
+       mutex_lock(&sclp_cpi_mutex);
        set_string(system_name, system);
        set_string(sysplex_name, sysplex);
        set_string(system_type, type);
        system_level = level;
 
-       return cpi_req();
+       rc = cpi_req();
+       mutex_unlock(&sclp_cpi_mutex);
+
+       return rc;
 }
 EXPORT_SYMBOL(sclp_cpi_set_data);