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authorJun'ichi Nomura \(NEC\)2015-02-12 01:26:24 +0000
committerDavid S. Miller2015-02-11 19:51:08 -0800
commitd0af71a3573f1217b140c60b66f1a9b335fb058b (patch)
tree9ff0a8a40744df0ab52f64e3eb1f16dc67855f07
parentb3b482c6e2259729ca8ab25eb488373abbc4675d (diff)
tg3: Hold tp->lock before calling tg3_halt() from tg3_init_one()
tg3_init_one() calls tg3_halt() without tp->lock despite its assumption and causes deadlock. If lockdep is enabled, a warning like this shows up before the stall: [ BUG: bad unlock balance detected! ] 3.19.0test #3 Tainted: G E ------------------------------------- insmod/369 is trying to release lock (&(&tp->lock)->rlock) at: [<ffffffffa02d5a1d>] tg3_chip_reset+0x14d/0x780 [tg3] but there are no more locks to release! tg3_init_one() doesn't call tg3_halt() under normal situation but during kexec kdump I hit this problem. Fixes: 932f19de ("tg3: Release tp->lock before invoking synchronize_irq()") Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/ethernet/broadcom/tg3.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index 615a6dbde047..23a019cee279 100644
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -17855,8 +17855,10 @@ static int tg3_init_one(struct pci_dev *pdev,
*/
if ((tr32(HOSTCC_MODE) & HOSTCC_MODE_ENABLE) ||
(tr32(WDMAC_MODE) & WDMAC_MODE_ENABLE)) {
+ tg3_full_lock(tp, 0);
tw32(MEMARB_MODE, MEMARB_MODE_ENABLE);
tg3_halt(tp, RESET_KIND_SHUTDOWN, 1);
+ tg3_full_unlock(tp);
}
err = tg3_test_dma(tp);