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| author | Hariprasad Shenai <hariprasad@chelsio.com> | 2015-02-09 09:47:10 +0530 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-02-08 21:53:27 -0800 |
| commit | acde2c2d28c8afee41eb67ee1cbf9e47a3f3e475 (patch) | |
| tree | 2c891b1d8914b09ecc960c6e6536f3abf0384442 /drivers/net/ethernet/chelsio/cxgb4/clip_tbl.c | |
| parent | 61d7b097738c9e37f7d5dcb1adf54a54d34444f7 (diff) | |
| download | linux-acde2c2d28c8afee41eb67ee1cbf9e47a3f3e475.tar.bz2 | |
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/ethernet/chelsio/cxgb4/clip_tbl.c')
| -rw-r--r-- | drivers/net/ethernet/chelsio/cxgb4/clip_tbl.c | 3 |
1 files changed, 3 insertions, 0 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 |