From 63350bdb384543e2fcfd007b9da8239f03c56860 Mon Sep 17 00:00:00 2001 From: Rohit Sarkar Date: Wed, 11 Sep 2019 19:21:13 +0530 Subject: [PATCH] staging: vhciq_core: replace snprintf with scnprintf When the number of bytes to be printed exceeds the limit snprintf returns the number of bytes that would have been printed (if there was no truncation). This might cause issues, hence use scnprintf which returns the actual number of bytes printed to buffer always Signed-off-by: Rohit Sarkar Reviewed-by: Dan Carpenter Link: https://lore.kernel.org/r/20190911135112.GA5569@SARKAR Signed-off-by: Greg Kroah-Hartman --- .../interface/vchiq_arm/vchiq_core.c | 38 +++++++++---------- 1 file changed, 19 insertions(+), 19 deletions(-) diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c index 183f5cf887e0..56a23a297fa4 100644 --- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c +++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c @@ -3322,13 +3322,13 @@ vchiq_dump_shared_state(void *dump_context, struct vchiq_state *state, char buf[80]; int len; - len = snprintf(buf, sizeof(buf), + len = scnprintf(buf, sizeof(buf), " %s: slots %d-%d tx_pos=%x recycle=%x", label, shared->slot_first, shared->slot_last, shared->tx_pos, shared->slot_queue_recycle); vchiq_dump(dump_context, buf, len + 1); - len = snprintf(buf, sizeof(buf), + len = scnprintf(buf, sizeof(buf), " Slots claimed:"); vchiq_dump(dump_context, buf, len + 1); @@ -3336,7 +3336,7 @@ vchiq_dump_shared_state(void *dump_context, struct vchiq_state *state, struct vchiq_slot_info slot_info = *SLOT_INFO_FROM_INDEX(state, i); if (slot_info.use_count != slot_info.release_count) { - len = snprintf(buf, sizeof(buf), + len = scnprintf(buf, sizeof(buf), " %d: %d/%d", i, slot_info.use_count, slot_info.release_count); vchiq_dump(dump_context, buf, len + 1); @@ -3344,7 +3344,7 @@ vchiq_dump_shared_state(void *dump_context, struct vchiq_state *state, } for (i = 1; i < shared->debug[DEBUG_ENTRIES]; i++) { - len = snprintf(buf, sizeof(buf), " DEBUG: %s = %d(%x)", + len = scnprintf(buf, sizeof(buf), " DEBUG: %s = %d(%x)", debug_names[i], shared->debug[i], shared->debug[i]); vchiq_dump(dump_context, buf, len + 1); } @@ -3357,11 +3357,11 @@ vchiq_dump_state(void *dump_context, struct vchiq_state *state) int len; int i; - len = snprintf(buf, sizeof(buf), "State %d: %s", state->id, + len = scnprintf(buf, sizeof(buf), "State %d: %s", state->id, conn_state_names[state->conn_state]); vchiq_dump(dump_context, buf, len + 1); - len = snprintf(buf, sizeof(buf), + len = scnprintf(buf, sizeof(buf), " tx_pos=%x(@%pK), rx_pos=%x(@%pK)", state->local->tx_pos, state->tx_data + (state->local_tx_pos & VCHIQ_SLOT_MASK), @@ -3369,13 +3369,13 @@ vchiq_dump_state(void *dump_context, struct vchiq_state *state) state->rx_data + (state->rx_pos & VCHIQ_SLOT_MASK)); vchiq_dump(dump_context, buf, len + 1); - len = snprintf(buf, sizeof(buf), + len = scnprintf(buf, sizeof(buf), " Version: %d (min %d)", VCHIQ_VERSION, VCHIQ_VERSION_MIN); vchiq_dump(dump_context, buf, len + 1); if (VCHIQ_ENABLE_STATS) { - len = snprintf(buf, sizeof(buf), + len = scnprintf(buf, sizeof(buf), " Stats: ctrl_tx_count=%d, ctrl_rx_count=%d, " "error_count=%d", state->stats.ctrl_tx_count, state->stats.ctrl_rx_count, @@ -3383,7 +3383,7 @@ vchiq_dump_state(void *dump_context, struct vchiq_state *state) vchiq_dump(dump_context, buf, len + 1); } - len = snprintf(buf, sizeof(buf), + len = scnprintf(buf, sizeof(buf), " Slots: %d available (%d data), %d recyclable, %d stalls " "(%d data)", ((state->slot_queue_available * VCHIQ_SLOT_SIZE) - @@ -3416,7 +3416,7 @@ vchiq_dump_service_state(void *dump_context, struct vchiq_service *service) char buf[80]; int len; - len = snprintf(buf, sizeof(buf), "Service %u: %s (ref %u)", + len = scnprintf(buf, sizeof(buf), "Service %u: %s (ref %u)", service->localport, srvstate_names[service->srvstate], service->ref_count - 1); /*Don't include the lock just taken*/ @@ -3428,17 +3428,17 @@ vchiq_dump_service_state(void *dump_context, struct vchiq_service *service) int tx_pending, rx_pending; if (service->remoteport != VCHIQ_PORT_FREE) { - int len2 = snprintf(remoteport, sizeof(remoteport), + int len2 = scnprintf(remoteport, sizeof(remoteport), "%u", service->remoteport); if (service->public_fourcc != VCHIQ_FOURCC_INVALID) - snprintf(remoteport + len2, + scnprintf(remoteport + len2, sizeof(remoteport) - len2, " (client %x)", service->client_id); } else strcpy(remoteport, "n/a"); - len += snprintf(buf + len, sizeof(buf) - len, + len += scnprintf(buf + len, sizeof(buf) - len, " '%c%c%c%c' remote %s (msg use %d/%d, slot use %d/%d)", VCHIQ_FOURCC_AS_4CHARS(fourcc), remoteport, @@ -3455,7 +3455,7 @@ vchiq_dump_service_state(void *dump_context, struct vchiq_service *service) rx_pending = service->bulk_rx.local_insert - service->bulk_rx.remote_insert; - len = snprintf(buf, sizeof(buf), + len = scnprintf(buf, sizeof(buf), " Bulk: tx_pending=%d (size %d)," " rx_pending=%d (size %d)", tx_pending, @@ -3468,7 +3468,7 @@ vchiq_dump_service_state(void *dump_context, struct vchiq_service *service) if (VCHIQ_ENABLE_STATS) { vchiq_dump(dump_context, buf, len + 1); - len = snprintf(buf, sizeof(buf), + len = scnprintf(buf, sizeof(buf), " Ctrl: tx_count=%d, tx_bytes=%llu, " "rx_count=%d, rx_bytes=%llu", service->stats.ctrl_tx_count, @@ -3477,7 +3477,7 @@ vchiq_dump_service_state(void *dump_context, struct vchiq_service *service) service->stats.ctrl_rx_bytes); vchiq_dump(dump_context, buf, len + 1); - len = snprintf(buf, sizeof(buf), + len = scnprintf(buf, sizeof(buf), " Bulk: tx_count=%d, tx_bytes=%llu, " "rx_count=%d, rx_bytes=%llu", service->stats.bulk_tx_count, @@ -3486,7 +3486,7 @@ vchiq_dump_service_state(void *dump_context, struct vchiq_service *service) service->stats.bulk_rx_bytes); vchiq_dump(dump_context, buf, len + 1); - len = snprintf(buf, sizeof(buf), + len = scnprintf(buf, sizeof(buf), " %d quota stalls, %d slot stalls, " "%d bulk stalls, %d aborted, %d errors", service->stats.quota_stalls, @@ -3562,9 +3562,9 @@ void vchiq_log_dump_mem(const char *label, u32 addr, const void *void_mem, for (offset = 0; offset < 16; offset++) { if (offset < num_bytes) - s += snprintf(s, 4, "%02x ", mem[offset]); + s += scnprintf(s, 4, "%02x ", mem[offset]); else - s += snprintf(s, 4, " "); + s += scnprintf(s, 4, " "); } for (offset = 0; offset < 16; offset++) {