s390/qeth: clean up L3 sysfs code

Consolidate some duplicated code for adding RXIP/VIPA addresses, and
move the locking to where it's actually needed.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index 3710761..8db5483 100644 (file)
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -571,6 +571,7 @@ int qeth_l3_add_ipato_entry(struct qeth_card *card,
 
        QETH_CARD_TEXT(card, 2, "addipato");
 
+       mutex_lock(&card->conf_mutex);
        mutex_lock(&card->ip_lock);
 
        list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
@@ -590,6 +591,7 @@ int qeth_l3_add_ipato_entry(struct qeth_card *card,
        }
 
        mutex_unlock(&card->ip_lock);
+       mutex_unlock(&card->conf_mutex);
 
        return rc;
 }
@@ -603,6 +605,7 @@ int qeth_l3_del_ipato_entry(struct qeth_card *card,
 
        QETH_CARD_TEXT(card, 2, "delipato");
 
+       mutex_lock(&card->conf_mutex);
        mutex_lock(&card->ip_lock);
 
        list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
@@ -619,6 +622,8 @@ int qeth_l3_del_ipato_entry(struct qeth_card *card,
        }
 
        mutex_unlock(&card->ip_lock);
+       mutex_unlock(&card->conf_mutex);
+
        return rc;
 }
 
@@ -627,6 +632,7 @@ int qeth_l3_modify_rxip_vipa(struct qeth_card *card, bool add, const u8 *ip,
                             enum qeth_prot_versions proto)
 {
        struct qeth_ipaddr addr;
+       int rc;
 
        qeth_l3_init_ipaddr(&addr, type, proto);
        if (proto == QETH_PROT_IPV4)
@@ -634,7 +640,11 @@ int qeth_l3_modify_rxip_vipa(struct qeth_card *card, bool add, const u8 *ip,
        else
                memcpy(&addr.u.a6.addr, ip, 16);
 
-       return qeth_l3_modify_ip(card, &addr, add);
+       mutex_lock(&card->conf_mutex);
+       rc = qeth_l3_modify_ip(card, &addr, add);
+       mutex_unlock(&card->conf_mutex);
+
+       return rc;
 }
 
 int qeth_l3_modify_hsuid(struct qeth_card *card, bool add)

diff --git a/drivers/s390/net/qeth_l3_sys.c b/drivers/s390/net/qeth_l3_sys.c
index aa9f3fc..96c7396 100644 (file)
--- a/drivers/s390/net/qeth_l3_sys.c
+++ b/drivers/s390/net/qeth_l3_sys.c
@@ -460,16 +460,14 @@ static ssize_t qeth_l3_dev_ipato_add_store(const char *buf, size_t count,
        int mask_bits;
        int rc = 0;
 
-       mutex_lock(&card->conf_mutex);
        rc = qeth_l3_parse_ipatoe(buf, proto, addr, &mask_bits);
        if (rc)
-               goto out;
+               return rc;
 
        ipatoe = kzalloc(sizeof(struct qeth_ipato_entry), GFP_KERNEL);
-       if (!ipatoe) {
-               rc = -ENOMEM;
-               goto out;
-       }
+       if (!ipatoe)
+               return -ENOMEM;
+
        ipatoe->proto = proto;
        memcpy(ipatoe->addr, addr, (proto == QETH_PROT_IPV4)? 4:16);
        ipatoe->mask_bits = mask_bits;
@@ -477,8 +475,7 @@ static ssize_t qeth_l3_dev_ipato_add_store(const char *buf, size_t count,
        rc = qeth_l3_add_ipato_entry(card, ipatoe);
        if (rc)
                kfree(ipatoe);
-out:
-       mutex_unlock(&card->conf_mutex);
+
        return rc ? rc : count;
 }
 
@@ -501,11 +498,9 @@ static ssize_t qeth_l3_dev_ipato_del_store(const char *buf, size_t count,
        int mask_bits;
        int rc = 0;
 
-       mutex_lock(&card->conf_mutex);
        rc = qeth_l3_parse_ipatoe(buf, proto, addr, &mask_bits);
        if (!rc)
                rc = qeth_l3_del_ipato_entry(card, proto, addr, mask_bits);
-       mutex_unlock(&card->conf_mutex);
        return rc ? rc : count;
 }
 
@@ -650,63 +645,34 @@ static ssize_t qeth_l3_dev_vipa_add4_show(struct device *dev,
                                       QETH_IP_TYPE_VIPA);
 }
 
-static int qeth_l3_parse_vipae(const char *buf, enum qeth_prot_versions proto,
-                u8 *addr)
-{
-       if (qeth_l3_string_to_ipaddr(buf, proto, addr)) {
-               return -EINVAL;
-       }
-       return 0;
-}
-
-static ssize_t qeth_l3_dev_vipa_add_store(const char *buf, size_t count,
-                       struct qeth_card *card, enum qeth_prot_versions proto)
+static ssize_t qeth_l3_vipa_store(struct device *dev, const char *buf, bool add,
+                                 size_t count, enum qeth_prot_versions proto)
 {
+       struct qeth_card *card = dev_get_drvdata(dev);
        u8 addr[16] = {0, };
        int rc;
 
-       mutex_lock(&card->conf_mutex);
-       rc = qeth_l3_parse_vipae(buf, proto, addr);
+       rc = qeth_l3_string_to_ipaddr(buf, proto, addr);
        if (!rc)
-               rc = qeth_l3_modify_rxip_vipa(card, true, addr,
+               rc = qeth_l3_modify_rxip_vipa(card, add, addr,
                                              QETH_IP_TYPE_VIPA, proto);
-       mutex_unlock(&card->conf_mutex);
        return rc ? rc : count;
 }
 
 static ssize_t qeth_l3_dev_vipa_add4_store(struct device *dev,
                struct device_attribute *attr, const char *buf, size_t count)
 {
-       struct qeth_card *card = dev_get_drvdata(dev);
-
-       return qeth_l3_dev_vipa_add_store(buf, count, card, QETH_PROT_IPV4);
+       return qeth_l3_vipa_store(dev, buf, true, count, QETH_PROT_IPV4);
 }
 
 static QETH_DEVICE_ATTR(vipa_add4, add4, 0644,
                        qeth_l3_dev_vipa_add4_show,
                        qeth_l3_dev_vipa_add4_store);
 
-static ssize_t qeth_l3_dev_vipa_del_store(const char *buf, size_t count,
-                        struct qeth_card *card, enum qeth_prot_versions proto)
-{
-       u8 addr[16];
-       int rc;
-
-       mutex_lock(&card->conf_mutex);
-       rc = qeth_l3_parse_vipae(buf, proto, addr);
-       if (!rc)
-               rc = qeth_l3_modify_rxip_vipa(card, false, addr,
-                                             QETH_IP_TYPE_VIPA, proto);
-       mutex_unlock(&card->conf_mutex);
-       return rc ? rc : count;
-}
-
 static ssize_t qeth_l3_dev_vipa_del4_store(struct device *dev,
                struct device_attribute *attr, const char *buf, size_t count)
 {
-       struct qeth_card *card = dev_get_drvdata(dev);
-
-       return qeth_l3_dev_vipa_del_store(buf, count, card, QETH_PROT_IPV4);
+       return qeth_l3_vipa_store(dev, buf, true, count, QETH_PROT_IPV4);
 }
 
 static QETH_DEVICE_ATTR(vipa_del4, del4, 0200, NULL,
@@ -723,9 +689,7 @@ static ssize_t qeth_l3_dev_vipa_add6_show(struct device *dev,
 static ssize_t qeth_l3_dev_vipa_add6_store(struct device *dev,
                struct device_attribute *attr, const char *buf, size_t count)
 {
-       struct qeth_card *card = dev_get_drvdata(dev);
-
-       return qeth_l3_dev_vipa_add_store(buf, count, card, QETH_PROT_IPV6);
+       return qeth_l3_vipa_store(dev, buf, true, count, QETH_PROT_IPV6);
 }
 
 static QETH_DEVICE_ATTR(vipa_add6, add6, 0644,
@@ -735,9 +699,7 @@ static QETH_DEVICE_ATTR(vipa_add6, add6, 0644,
 static ssize_t qeth_l3_dev_vipa_del6_store(struct device *dev,
                struct device_attribute *attr, const char *buf, size_t count)
 {
-       struct qeth_card *card = dev_get_drvdata(dev);
-
-       return qeth_l3_dev_vipa_del_store(buf, count, card, QETH_PROT_IPV6);
+       return qeth_l3_vipa_store(dev, buf, false, count, QETH_PROT_IPV6);
 }
 
 static QETH_DEVICE_ATTR(vipa_del6, del6, 0200, NULL,
@@ -790,54 +752,34 @@ static int qeth_l3_parse_rxipe(const char *buf, enum qeth_prot_versions proto,
        return 0;
 }
 
-static ssize_t qeth_l3_dev_rxip_add_store(const char *buf, size_t count,
-                       struct qeth_card *card, enum qeth_prot_versions proto)
+static ssize_t qeth_l3_rxip_store(struct device *dev, const char *buf, bool add,
+                                 size_t count, enum qeth_prot_versions proto)
 {
+       struct qeth_card *card = dev_get_drvdata(dev);
        u8 addr[16] = {0, };
        int rc;
 
-       mutex_lock(&card->conf_mutex);
        rc = qeth_l3_parse_rxipe(buf, proto, addr);
        if (!rc)
-               rc = qeth_l3_modify_rxip_vipa(card, true, addr,
+               rc = qeth_l3_modify_rxip_vipa(card, add, addr,
                                              QETH_IP_TYPE_RXIP, proto);
-       mutex_unlock(&card->conf_mutex);
        return rc ? rc : count;
 }
 
 static ssize_t qeth_l3_dev_rxip_add4_store(struct device *dev,
                struct device_attribute *attr, const char *buf, size_t count)
 {
-       struct qeth_card *card = dev_get_drvdata(dev);
-
-       return qeth_l3_dev_rxip_add_store(buf, count, card, QETH_PROT_IPV4);
+       return qeth_l3_rxip_store(dev, buf, true, count, QETH_PROT_IPV4);
 }
 
 static QETH_DEVICE_ATTR(rxip_add4, add4, 0644,
                        qeth_l3_dev_rxip_add4_show,
                        qeth_l3_dev_rxip_add4_store);
 
-static ssize_t qeth_l3_dev_rxip_del_store(const char *buf, size_t count,
-                       struct qeth_card *card, enum qeth_prot_versions proto)
-{
-       u8 addr[16];
-       int rc;
-
-       mutex_lock(&card->conf_mutex);
-       rc = qeth_l3_parse_rxipe(buf, proto, addr);
-       if (!rc)
-               rc = qeth_l3_modify_rxip_vipa(card, false, addr,
-                                             QETH_IP_TYPE_RXIP, proto);
-       mutex_unlock(&card->conf_mutex);
-       return rc ? rc : count;
-}
-
 static ssize_t qeth_l3_dev_rxip_del4_store(struct device *dev,
                struct device_attribute *attr, const char *buf, size_t count)
 {
-       struct qeth_card *card = dev_get_drvdata(dev);
-
-       return qeth_l3_dev_rxip_del_store(buf, count, card, QETH_PROT_IPV4);
+       return qeth_l3_rxip_store(dev, buf, false, count, QETH_PROT_IPV4);
 }
 
 static QETH_DEVICE_ATTR(rxip_del4, del4, 0200, NULL,
@@ -854,9 +796,7 @@ static ssize_t qeth_l3_dev_rxip_add6_show(struct device *dev,
 static ssize_t qeth_l3_dev_rxip_add6_store(struct device *dev,
                struct device_attribute *attr, const char *buf, size_t count)
 {
-       struct qeth_card *card = dev_get_drvdata(dev);
-
-       return qeth_l3_dev_rxip_add_store(buf, count, card, QETH_PROT_IPV6);
+       return qeth_l3_rxip_store(dev, buf, true, count, QETH_PROT_IPV6);
 }
 
 static QETH_DEVICE_ATTR(rxip_add6, add6, 0644,
@@ -866,9 +806,7 @@ static QETH_DEVICE_ATTR(rxip_add6, add6, 0644,
 static ssize_t qeth_l3_dev_rxip_del6_store(struct device *dev,
                struct device_attribute *attr, const char *buf, size_t count)
 {
-       struct qeth_card *card = dev_get_drvdata(dev);
-
-       return qeth_l3_dev_rxip_del_store(buf, count, card, QETH_PROT_IPV6);
+       return qeth_l3_rxip_store(dev, buf, false, count, QETH_PROT_IPV6);
 }
 
 static QETH_DEVICE_ATTR(rxip_del6, del6, 0200, NULL,