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authorHariprasad Shenai <hariprasad@chelsio.com>2015-02-09 07:17:10 +0300
committerDavid S. Miller <davem@davemloft.net>2015-02-09 08:53:27 +0300
commitacde2c2d28c8afee41eb67ee1cbf9e47a3f3e475 (patch)
tree2c891b1d8914b09ecc960c6e6536f3abf0384442 /drivers/net
parent61d7b097738c9e37f7d5dcb1adf54a54d34444f7 (diff)
downloadlinux-acde2c2d28c8afee41eb67ee1cbf9e47a3f3e475.tar.xz
cxgb4: Fix trace observed while dumping clip_tbl
Handle clip_tbl debugfs entry, when clip_tbl isn't allocated. In commit b5a02f503caa0837 ("cxgb4: Update ipv6 address handling api") wrong argument was passed for single_open for clip_tbl debugfs entry, which led to below trace. Fixing it. ====== call Trace: [<ffffffffa073c606>] clip_tbl_open+0x16/0x30 [cxgb4] [<ffffffff8119e2fa>] do_dentry_open+0x21a/0x370 [<ffffffff8119e499>] vfs_open+0x49/0x50 [<ffffffff811b0d0e>] do_last+0x21e/0x800 [<ffffffff811b1382>] path_openat+0x92/0x470 [<ffffffff8110569f>] ? rb_reserve_next_event+0xaf/0x380 [<ffffffff8110569f>] ? rb_reserve_next_event+0xaf/0x380 [<ffffffff811b189a>] do_filp_open+0x4a/0xa0 [<ffffffff811bdc5d>] ? __alloc_fd+0xcd/0x140 [<ffffffff8119fa4a>] do_sys_open+0x11a/0x230 [<ffffffff8101219f>] ? syscall_trace_enter_phase2+0xaf/0x1b0 [<ffffffff8119fb9e>] SyS_open+0x1e/0x20 [<ffffffff815bf6f0>] tracesys_phase2+0xd4/0xd9 Code: 89 e5 66 66 66 66 90 48 8b 47 e0 48 8b 40 30 48 8b 40 58 c9 c3 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 66 66 66 66 90 48 8b 47 e0 <48> 8b 40 58 c9 c3 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 RIP [<ffffffff8120898d>] PDE_DATA+0xd/0x20 RSP <ffff8800b08c3c48> CR2: 0000000000000058 ===== Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/ethernet/chelsio/cxgb4/clip_tbl.c3
-rw-r--r--drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c2
2 files changed, 4 insertions, 1 deletions
diff --git a/drivers/net/ethernet/chelsio/cxgb4/clip_tbl.c b/drivers/net/ethernet/chelsio/cxgb4/clip_tbl.c
index 2b407b6a35a8..9062a8434246 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/clip_tbl.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/clip_tbl.c
@@ -81,6 +81,9 @@ int cxgb4_clip_get(const struct net_device *dev, const u32 *lip, u8 v6)
int addr_len;
int ret = 0;
+ if (!ctbl)
+ return 0;
+
if (v6)
addr_len = 16;
else
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
index a1029eecef02..d221f6b28fcd 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
@@ -1237,7 +1237,7 @@ DEFINE_SIMPLE_DEBUGFS_FILE(sensors);
#if IS_ENABLED(CONFIG_IPV6)
static int clip_tbl_open(struct inode *inode, struct file *file)
{
- return single_open(file, clip_tbl_show, PDE_DATA(inode));
+ return single_open(file, clip_tbl_show, inode->i_private);
}
static const struct file_operations clip_tbl_debugfs_fops = {