s390/zcrypt: replace snprintf/sprintf with scnprintf

snprintf() may not always return the correct size of used bytes but
instead the length the resulting string would be if it would fit into
the buffer. So scnprintf() is the function to use when the real length
of the resulting string is needed.

Replace all occurrences of snprintf() with scnprintf() where the return
code is further processed. Also find and fix some occurrences where
sprintf() was used.

Suggested-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c
index 5256e3ce84e56a5144368d9017c17da5bb336c12..171b0a08e0f954b8dd7f12dfeae94c94a04ef8b1 100644 (file)
--- a/drivers/s390/crypto/ap_bus.c
+++ b/drivers/s390/crypto/ap_bus.c
@@ -1021,7 +1021,7 @@ EXPORT_SYMBOL(ap_parse_mask_str);
 
 static ssize_t ap_domain_show(struct bus_type *bus, char *buf)
 {
-       return snprintf(buf, PAGE_SIZE, "%d\n", ap_domain_index);
+       return scnprintf(buf, PAGE_SIZE, "%d\n", ap_domain_index);
 }
 
 static ssize_t ap_domain_store(struct bus_type *bus,
@@ -1047,14 +1047,14 @@ static BUS_ATTR_RW(ap_domain);
 static ssize_t ap_control_domain_mask_show(struct bus_type *bus, char *buf)
 {
        if (!ap_configuration)  /* QCI not supported */
-               return snprintf(buf, PAGE_SIZE, "not supported\n");
+               return scnprintf(buf, PAGE_SIZE, "not supported\n");
 
-       return snprintf(buf, PAGE_SIZE,
-                       "0x%08x%08x%08x%08x%08x%08x%08x%08x\n",
-                       ap_configuration->adm[0], ap_configuration->adm[1],
-                       ap_configuration->adm[2], ap_configuration->adm[3],
-                       ap_configuration->adm[4], ap_configuration->adm[5],
-                       ap_configuration->adm[6], ap_configuration->adm[7]);
+       return scnprintf(buf, PAGE_SIZE,
+                        "0x%08x%08x%08x%08x%08x%08x%08x%08x\n",
+                        ap_configuration->adm[0], ap_configuration->adm[1],
+                        ap_configuration->adm[2], ap_configuration->adm[3],
+                        ap_configuration->adm[4], ap_configuration->adm[5],
+                        ap_configuration->adm[6], ap_configuration->adm[7]);
 }
 
 static BUS_ATTR_RO(ap_control_domain_mask);
@@ -1062,14 +1062,14 @@ static BUS_ATTR_RO(ap_control_domain_mask);
 static ssize_t ap_usage_domain_mask_show(struct bus_type *bus, char *buf)
 {
        if (!ap_configuration)  /* QCI not supported */
-               return snprintf(buf, PAGE_SIZE, "not supported\n");
+               return scnprintf(buf, PAGE_SIZE, "not supported\n");
 
-       return snprintf(buf, PAGE_SIZE,
-                       "0x%08x%08x%08x%08x%08x%08x%08x%08x\n",
-                       ap_configuration->aqm[0], ap_configuration->aqm[1],
-                       ap_configuration->aqm[2], ap_configuration->aqm[3],
-                       ap_configuration->aqm[4], ap_configuration->aqm[5],
-                       ap_configuration->aqm[6], ap_configuration->aqm[7]);
+       return scnprintf(buf, PAGE_SIZE,
+                        "0x%08x%08x%08x%08x%08x%08x%08x%08x\n",
+                        ap_configuration->aqm[0], ap_configuration->aqm[1],
+                        ap_configuration->aqm[2], ap_configuration->aqm[3],
+                        ap_configuration->aqm[4], ap_configuration->aqm[5],
+                        ap_configuration->aqm[6], ap_configuration->aqm[7]);
 }
 
 static BUS_ATTR_RO(ap_usage_domain_mask);
@@ -1077,29 +1077,29 @@ static BUS_ATTR_RO(ap_usage_domain_mask);
 static ssize_t ap_adapter_mask_show(struct bus_type *bus, char *buf)
 {
        if (!ap_configuration)  /* QCI not supported */
-               return snprintf(buf, PAGE_SIZE, "not supported\n");
+               return scnprintf(buf, PAGE_SIZE, "not supported\n");
 
-       return snprintf(buf, PAGE_SIZE,
-                       "0x%08x%08x%08x%08x%08x%08x%08x%08x\n",
-                       ap_configuration->apm[0], ap_configuration->apm[1],
-                       ap_configuration->apm[2], ap_configuration->apm[3],
-                       ap_configuration->apm[4], ap_configuration->apm[5],
-                       ap_configuration->apm[6], ap_configuration->apm[7]);
+       return scnprintf(buf, PAGE_SIZE,
+                        "0x%08x%08x%08x%08x%08x%08x%08x%08x\n",
+                        ap_configuration->apm[0], ap_configuration->apm[1],
+                        ap_configuration->apm[2], ap_configuration->apm[3],
+                        ap_configuration->apm[4], ap_configuration->apm[5],
+                        ap_configuration->apm[6], ap_configuration->apm[7]);
 }
 
 static BUS_ATTR_RO(ap_adapter_mask);
 
 static ssize_t ap_interrupts_show(struct bus_type *bus, char *buf)
 {
-       return snprintf(buf, PAGE_SIZE, "%d\n",
-                       ap_using_interrupts() ? 1 : 0);
+       return scnprintf(buf, PAGE_SIZE, "%d\n",
+                        ap_using_interrupts() ? 1 : 0);
 }
 
 static BUS_ATTR_RO(ap_interrupts);
 
 static ssize_t config_time_show(struct bus_type *bus, char *buf)
 {
-       return snprintf(buf, PAGE_SIZE, "%d\n", ap_config_time);
+       return scnprintf(buf, PAGE_SIZE, "%d\n", ap_config_time);
 }
 
 static ssize_t config_time_store(struct bus_type *bus,
@@ -1118,7 +1118,7 @@ static BUS_ATTR_RW(config_time);
 
 static ssize_t poll_thread_show(struct bus_type *bus, char *buf)
 {
-       return snprintf(buf, PAGE_SIZE, "%d\n", ap_poll_kthread ? 1 : 0);
+       return scnprintf(buf, PAGE_SIZE, "%d\n", ap_poll_kthread ? 1 : 0);
 }
 
 static ssize_t poll_thread_store(struct bus_type *bus,
@@ -1141,7 +1141,7 @@ static BUS_ATTR_RW(poll_thread);
 
 static ssize_t poll_timeout_show(struct bus_type *bus, char *buf)
 {
-       return snprintf(buf, PAGE_SIZE, "%llu\n", poll_timeout);
+       return scnprintf(buf, PAGE_SIZE, "%llu\n", poll_timeout);
 }
 
 static ssize_t poll_timeout_store(struct bus_type *bus, const char *buf,
@@ -1176,7 +1176,7 @@ static ssize_t ap_max_domain_id_show(struct bus_type *bus, char *buf)
                max_domain_id = ap_max_domain_id ? : -1;
        else
                max_domain_id = 15;
-       return snprintf(buf, PAGE_SIZE, "%d\n", max_domain_id);
+       return scnprintf(buf, PAGE_SIZE, "%d\n", max_domain_id);
 }
 
 static BUS_ATTR_RO(ap_max_domain_id);
@@ -1187,10 +1187,10 @@ static ssize_t apmask_show(struct bus_type *bus, char *buf)
 
        if (mutex_lock_interruptible(&ap_perms_mutex))
                return -ERESTARTSYS;
-       rc = snprintf(buf, PAGE_SIZE,
-                     "0x%016lx%016lx%016lx%016lx\n",
-                     ap_perms.apm[0], ap_perms.apm[1],
-                     ap_perms.apm[2], ap_perms.apm[3]);
+       rc = scnprintf(buf, PAGE_SIZE,
+                      "0x%016lx%016lx%016lx%016lx\n",
+                      ap_perms.apm[0], ap_perms.apm[1],
+                      ap_perms.apm[2], ap_perms.apm[3]);
        mutex_unlock(&ap_perms_mutex);
 
        return rc;
@@ -1218,10 +1218,10 @@ static ssize_t aqmask_show(struct bus_type *bus, char *buf)
 
        if (mutex_lock_interruptible(&ap_perms_mutex))
                return -ERESTARTSYS;
-       rc = snprintf(buf, PAGE_SIZE,
-                     "0x%016lx%016lx%016lx%016lx\n",
-                     ap_perms.aqm[0], ap_perms.aqm[1],
-                     ap_perms.aqm[2], ap_perms.aqm[3]);
+       rc = scnprintf(buf, PAGE_SIZE,
+                      "0x%016lx%016lx%016lx%016lx\n",
+                      ap_perms.aqm[0], ap_perms.aqm[1],
+                      ap_perms.aqm[2], ap_perms.aqm[3]);
        mutex_unlock(&ap_perms_mutex);
 
        return rc;

diff --git a/drivers/s390/crypto/ap_card.c b/drivers/s390/crypto/ap_card.c
index e85bfca1ed163575989cae3e8120b235369ba0b4..0a39dfdb6a1dd1d1cd016a2db09d20368cee565c 100644 (file)
--- a/drivers/s390/crypto/ap_card.c
+++ b/drivers/s390/crypto/ap_card.c
@@ -23,7 +23,7 @@ static ssize_t hwtype_show(struct device *dev,
 {
        struct ap_card *ac = to_ap_card(dev);
 
-       return snprintf(buf, PAGE_SIZE, "%d\n", ac->ap_dev.device_type);
+       return scnprintf(buf, PAGE_SIZE, "%d\n", ac->ap_dev.device_type);
 }
 
 static DEVICE_ATTR_RO(hwtype);
@@ -33,7 +33,7 @@ static ssize_t raw_hwtype_show(struct device *dev,
 {
        struct ap_card *ac = to_ap_card(dev);
 
-       return snprintf(buf, PAGE_SIZE, "%d\n", ac->raw_hwtype);
+       return scnprintf(buf, PAGE_SIZE, "%d\n", ac->raw_hwtype);
 }
 
 static DEVICE_ATTR_RO(raw_hwtype);
@@ -43,7 +43,7 @@ static ssize_t depth_show(struct device *dev, struct device_attribute *attr,
 {
        struct ap_card *ac = to_ap_card(dev);
 
-       return snprintf(buf, PAGE_SIZE, "%d\n", ac->queue_depth);
+       return scnprintf(buf, PAGE_SIZE, "%d\n", ac->queue_depth);
 }
 
 static DEVICE_ATTR_RO(depth);
@@ -53,7 +53,7 @@ static ssize_t ap_functions_show(struct device *dev,
 {
        struct ap_card *ac = to_ap_card(dev);
 
-       return snprintf(buf, PAGE_SIZE, "0x%08X\n", ac->functions);
+       return scnprintf(buf, PAGE_SIZE, "0x%08X\n", ac->functions);
 }
 
 static DEVICE_ATTR_RO(ap_functions);
@@ -69,7 +69,7 @@ static ssize_t request_count_show(struct device *dev,
        spin_lock_bh(&ap_list_lock);
        req_cnt = atomic64_read(&ac->total_request_count);
        spin_unlock_bh(&ap_list_lock);
-       return snprintf(buf, PAGE_SIZE, "%llu\n", req_cnt);
+       return scnprintf(buf, PAGE_SIZE, "%llu\n", req_cnt);
 }
 
 static ssize_t request_count_store(struct device *dev,
@@ -102,7 +102,7 @@ static ssize_t requestq_count_show(struct device *dev,
        for_each_ap_queue(aq, ac)
                reqq_cnt += aq->requestq_count;
        spin_unlock_bh(&ap_list_lock);
-       return snprintf(buf, PAGE_SIZE, "%d\n", reqq_cnt);
+       return scnprintf(buf, PAGE_SIZE, "%d\n", reqq_cnt);
 }
 
 static DEVICE_ATTR_RO(requestq_count);
@@ -119,7 +119,7 @@ static ssize_t pendingq_count_show(struct device *dev,
        for_each_ap_queue(aq, ac)
                penq_cnt += aq->pendingq_count;
        spin_unlock_bh(&ap_list_lock);
-       return snprintf(buf, PAGE_SIZE, "%d\n", penq_cnt);
+       return scnprintf(buf, PAGE_SIZE, "%d\n", penq_cnt);
 }
 
 static DEVICE_ATTR_RO(pendingq_count);
@@ -127,7 +127,8 @@ static DEVICE_ATTR_RO(pendingq_count);
 static ssize_t modalias_show(struct device *dev,
                             struct device_attribute *attr, char *buf)
 {
-       return sprintf(buf, "ap:t%02X\n", to_ap_dev(dev)->device_type);
+       return scnprintf(buf, PAGE_SIZE, "ap:t%02X\n",
+                        to_ap_dev(dev)->device_type);
 }
 
 static DEVICE_ATTR_RO(modalias);

diff --git a/drivers/s390/crypto/ap_queue.c b/drivers/s390/crypto/ap_queue.c
index a317ab48493203e8082b0acc1a57fdd8fe62524b..39c0b246c69a2df1409eb5d768fc9ef244e37df9 100644 (file)
--- a/drivers/s390/crypto/ap_queue.c
+++ b/drivers/s390/crypto/ap_queue.c
@@ -484,7 +484,7 @@ static ssize_t request_count_show(struct device *dev,
        spin_lock_bh(&aq->lock);
        req_cnt = aq->total_request_count;
        spin_unlock_bh(&aq->lock);
-       return snprintf(buf, PAGE_SIZE, "%llu\n", req_cnt);
+       return scnprintf(buf, PAGE_SIZE, "%llu\n", req_cnt);
 }
 
 static ssize_t request_count_store(struct device *dev,
@@ -511,7 +511,7 @@ static ssize_t requestq_count_show(struct device *dev,
        spin_lock_bh(&aq->lock);
        reqq_cnt = aq->requestq_count;
        spin_unlock_bh(&aq->lock);
-       return snprintf(buf, PAGE_SIZE, "%d\n", reqq_cnt);
+       return scnprintf(buf, PAGE_SIZE, "%d\n", reqq_cnt);
 }
 
 static DEVICE_ATTR_RO(requestq_count);
@@ -525,7 +525,7 @@ static ssize_t pendingq_count_show(struct device *dev,
        spin_lock_bh(&aq->lock);
        penq_cnt = aq->pendingq_count;
        spin_unlock_bh(&aq->lock);
-       return snprintf(buf, PAGE_SIZE, "%d\n", penq_cnt);
+       return scnprintf(buf, PAGE_SIZE, "%d\n", penq_cnt);
 }
 
 static DEVICE_ATTR_RO(pendingq_count);
@@ -540,14 +540,14 @@ static ssize_t reset_show(struct device *dev,
        switch (aq->state) {
        case AP_STATE_RESET_START:
        case AP_STATE_RESET_WAIT:
-               rc = snprintf(buf, PAGE_SIZE, "Reset in progress.\n");
+               rc = scnprintf(buf, PAGE_SIZE, "Reset in progress.\n");
                break;
        case AP_STATE_WORKING:
        case AP_STATE_QUEUE_FULL:
-               rc = snprintf(buf, PAGE_SIZE, "Reset Timer armed.\n");
+               rc = scnprintf(buf, PAGE_SIZE, "Reset Timer armed.\n");
                break;
        default:
-               rc = snprintf(buf, PAGE_SIZE, "No Reset Timer set.\n");
+               rc = scnprintf(buf, PAGE_SIZE, "No Reset Timer set.\n");
        }
        spin_unlock_bh(&aq->lock);
        return rc;
@@ -581,11 +581,11 @@ static ssize_t interrupt_show(struct device *dev,
 
        spin_lock_bh(&aq->lock);
        if (aq->state == AP_STATE_SETIRQ_WAIT)
-               rc = snprintf(buf, PAGE_SIZE, "Enable Interrupt pending.\n");
+               rc = scnprintf(buf, PAGE_SIZE, "Enable Interrupt pending.\n");
        else if (aq->interrupt == AP_INTR_ENABLED)
-               rc = snprintf(buf, PAGE_SIZE, "Interrupts enabled.\n");
+               rc = scnprintf(buf, PAGE_SIZE, "Interrupts enabled.\n");
        else
-               rc = snprintf(buf, PAGE_SIZE, "Interrupts disabled.\n");
+               rc = scnprintf(buf, PAGE_SIZE, "Interrupts disabled.\n");
        spin_unlock_bh(&aq->lock);
        return rc;
 }

diff --git a/drivers/s390/crypto/zcrypt_card.c b/drivers/s390/crypto/zcrypt_card.c
index d4f35a183c157e899e3c505c40fd329aa60ab592..c53cab4b0c9e39d98e5a85903805fdc1bbd77776 100644 (file)
--- a/drivers/s390/crypto/zcrypt_card.c
+++ b/drivers/s390/crypto/zcrypt_card.c
@@ -41,7 +41,7 @@ static ssize_t type_show(struct device *dev,
 {
        struct zcrypt_card *zc = to_ap_card(dev)->private;
 
-       return snprintf(buf, PAGE_SIZE, "%s\n", zc->type_string);
+       return scnprintf(buf, PAGE_SIZE, "%s\n", zc->type_string);
 }
 
 static DEVICE_ATTR_RO(type);
@@ -52,7 +52,7 @@ static ssize_t online_show(struct device *dev,
 {
        struct zcrypt_card *zc = to_ap_card(dev)->private;
 
-       return snprintf(buf, PAGE_SIZE, "%d\n", zc->online);
+       return scnprintf(buf, PAGE_SIZE, "%d\n", zc->online);
 }
 
 static ssize_t online_store(struct device *dev,
@@ -86,7 +86,7 @@ static ssize_t load_show(struct device *dev,
 {
        struct zcrypt_card *zc = to_ap_card(dev)->private;
 
-       return snprintf(buf, PAGE_SIZE, "%d\n", atomic_read(&zc->load));
+       return scnprintf(buf, PAGE_SIZE, "%d\n", atomic_read(&zc->load));
 }
 
 static DEVICE_ATTR_RO(load);

diff --git a/drivers/s390/crypto/zcrypt_cex4.c b/drivers/s390/crypto/zcrypt_cex4.c
index 6fc1ea77fbe9e9b93bc7d101b5d9de6c779d8bf6..8cfb1e2e9e1b0cc153262fe55f1423d077bee281 100644 (file)
--- a/drivers/s390/crypto/zcrypt_cex4.c
+++ b/drivers/s390/crypto/zcrypt_cex4.c
@@ -87,7 +87,7 @@ static ssize_t cca_serialnr_show(struct device *dev,
        if (ap_domain_index >= 0)
                cca_get_info(ac->id, ap_domain_index, &ci, zc->online);
 
-       return snprintf(buf, PAGE_SIZE, "%s\n", ci.serial);
+       return scnprintf(buf, PAGE_SIZE, "%s\n", ci.serial);
 }
 
 static struct device_attribute dev_attr_cca_serialnr =
@@ -122,10 +122,10 @@ static ssize_t cca_mkvps_show(struct device *dev,
                     &ci, zq->online);
 
        if (ci.new_mk_state >= '1' && ci.new_mk_state <= '3')
-               n = snprintf(buf, PAGE_SIZE, "AES NEW: %s 0x%016llx\n",
-                            new_state[ci.new_mk_state - '1'], ci.new_mkvp);
+               n = scnprintf(buf, PAGE_SIZE, "AES NEW: %s 0x%016llx\n",
+                             new_state[ci.new_mk_state - '1'], ci.new_mkvp);
        else
-               n = snprintf(buf, PAGE_SIZE, "AES NEW: - -\n");
+               n = scnprintf(buf, PAGE_SIZE, "AES NEW: - -\n");
 
        if (ci.cur_mk_state >= '1' && ci.cur_mk_state <= '2')
                n += scnprintf(buf + n, PAGE_SIZE - n,
@@ -172,9 +172,9 @@ static ssize_t ep11_api_ordinalnr_show(struct device *dev,
        ep11_get_card_info(ac->id, &ci, zc->online);
 
        if (ci.API_ord_nr > 0)
-               return snprintf(buf, PAGE_SIZE, "%u\n", ci.API_ord_nr);
+               return scnprintf(buf, PAGE_SIZE, "%u\n", ci.API_ord_nr);
        else
-               return snprintf(buf, PAGE_SIZE, "\n");
+               return scnprintf(buf, PAGE_SIZE, "\n");
 }
 
 static struct device_attribute dev_attr_ep11_api_ordinalnr =
@@ -193,11 +193,11 @@ static ssize_t ep11_fw_version_show(struct device *dev,
        ep11_get_card_info(ac->id, &ci, zc->online);
 
        if (ci.FW_version > 0)
-               return snprintf(buf, PAGE_SIZE, "%d.%d\n",
-                               (int)(ci.FW_version >> 8),
-                               (int)(ci.FW_version & 0xFF));
+               return scnprintf(buf, PAGE_SIZE, "%d.%d\n",
+                                (int)(ci.FW_version >> 8),
+                                (int)(ci.FW_version & 0xFF));
        else
-               return snprintf(buf, PAGE_SIZE, "\n");
+               return scnprintf(buf, PAGE_SIZE, "\n");
 }
 
 static struct device_attribute dev_attr_ep11_fw_version =
@@ -216,9 +216,9 @@ static ssize_t ep11_serialnr_show(struct device *dev,
        ep11_get_card_info(ac->id, &ci, zc->online);
 
        if (ci.serial[0])
-               return snprintf(buf, PAGE_SIZE, "%16.16s\n", ci.serial);
+               return scnprintf(buf, PAGE_SIZE, "%16.16s\n", ci.serial);
        else
-               return snprintf(buf, PAGE_SIZE, "\n");
+               return scnprintf(buf, PAGE_SIZE, "\n");
 }
 
 static struct device_attribute dev_attr_ep11_serialnr =
@@ -300,16 +300,16 @@ static ssize_t ep11_mkvps_show(struct device *dev,
                                     &di);
 
        if (di.cur_wk_state == '0') {
-               n = snprintf(buf, PAGE_SIZE, "WK CUR: %s -\n",
-                            cwk_state[di.cur_wk_state - '0']);
+               n = scnprintf(buf, PAGE_SIZE, "WK CUR: %s -\n",
+                             cwk_state[di.cur_wk_state - '0']);
        } else if (di.cur_wk_state == '1') {
-               n = snprintf(buf, PAGE_SIZE, "WK CUR: %s 0x",
-                            cwk_state[di.cur_wk_state - '0']);
+               n = scnprintf(buf, PAGE_SIZE, "WK CUR: %s 0x",
+                             cwk_state[di.cur_wk_state - '0']);
                bin2hex(buf + n, di.cur_wkvp, sizeof(di.cur_wkvp));
                n += 2 * sizeof(di.cur_wkvp);
                n += scnprintf(buf + n, PAGE_SIZE - n, "\n");
        } else
-               n = snprintf(buf, PAGE_SIZE, "WK CUR: - -\n");
+               n = scnprintf(buf, PAGE_SIZE, "WK CUR: - -\n");
 
        if (di.new_wk_state == '0') {
                n += scnprintf(buf + n, PAGE_SIZE - n, "WK NEW: %s -\n",

diff --git a/drivers/s390/crypto/zcrypt_queue.c b/drivers/s390/crypto/zcrypt_queue.c
index 522c4bc69a084c7e0613231bfd1809efffdcdcfe..b7d9fa5678806d66bcbec90794949dcd89f3f226 100644 (file)
--- a/drivers/s390/crypto/zcrypt_queue.c
+++ b/drivers/s390/crypto/zcrypt_queue.c
@@ -42,7 +42,7 @@ static ssize_t online_show(struct device *dev,
 {
        struct zcrypt_queue *zq = to_ap_queue(dev)->private;
 
-       return snprintf(buf, PAGE_SIZE, "%d\n", zq->online);
+       return scnprintf(buf, PAGE_SIZE, "%d\n", zq->online);
 }
 
 static ssize_t online_store(struct device *dev,
@@ -78,7 +78,7 @@ static ssize_t load_show(struct device *dev,
 {
        struct zcrypt_queue *zq = to_ap_queue(dev)->private;
 
-       return snprintf(buf, PAGE_SIZE, "%d\n", atomic_read(&zq->load));
+       return scnprintf(buf, PAGE_SIZE, "%d\n", atomic_read(&zq->load));
 }
 
 static DEVICE_ATTR_RO(load);