From: Dor Shaish <dor.shaish@intel.com>
Date: Tue, 1 Jun 2010 07:04:08 +0000 (-0700)
Subject: iwlwifi: Fix null pointer referencing in iwl_dbgfs_rx_queue_read.
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=f5cc6a224d9f41d963fa4cee35d3db2559e8015d;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

iwlwifi: Fix null pointer referencing in iwl_dbgfs_rx_queue_read.

Test for null pointer prior to access.
Print "Not Allocated" if null pointer.

Signed-off-by: Dor Shaish <dor.shaish@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
---

diff --git a/drivers/net/wireless/iwlwifi/iwl-debugfs.c b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
index d9f21bb9d75d..cee3d12eb383 100644
--- a/drivers/net/wireless/iwlwifi/iwl-debugfs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
@@ -1018,8 +1018,13 @@ static ssize_t iwl_dbgfs_rx_queue_read(struct file *file,
 						rxq->write);
 	pos += scnprintf(buf + pos, bufsz - pos, "free_count: %u\n",
 						rxq->free_count);
-	pos += scnprintf(buf + pos, bufsz - pos, "closed_rb_num: %u\n",
+	if (rxq->rb_stts) {
+		pos += scnprintf(buf + pos, bufsz - pos, "closed_rb_num: %u\n",
 			 le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF);
+	} else {
+		pos += scnprintf(buf + pos, bufsz - pos,
+					"closed_rb_num: Not Allocated\n");
+	}
 	return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 }