From c7515d2365a6b8a018950198ebe1f5be793cd4bb Mon Sep 17 00:00:00 2001 From: Arend van Spriel Date: Wed, 25 Sep 2013 12:11:03 +0200 Subject: brcmsmac: call bcma_core_pci_power_save() from non-atomic context This patch adds explicit call to bcma_core_pci_power_save() from a non-atomic context resolving 'scheduling while atomic' issue. [ 13.224317] BUG: scheduling while atomic: dhcpcd/1800/0x00000202 [ 13.224322] Modules linked in: brcmsmac nouveau coretemp kvm_intel kvm cordic brcmutil bcma dell_wmi atl1c ttm mxm_wmi wmi [ 13.224354] CPU: 0 PID: 1800 Comm: dhcpcd Tainted: G W 3.11.0-wl #1 [ 13.224359] Hardware name: Alienware M11x R2/M11x R2, BIOS A04 11/23/2010 [ 13.224363] ffff880177c12c40 ffff880170fd1968 ffffffff8169af5b 0000000000000007 [ 13.224374] ffff880170fd1ad0 ffff880170fd1978 ffffffff81697ee2 ffff880170fd19f8 [ 13.224383] ffffffff816a19f5 00000000000f4240 000000000000d080 ffff880170fd1fd8 [ 13.224391] Call Trace: [ 13.224399] [] dump_stack+0x4f/0x84 [ 13.224403] [] __schedule_bug+0x43/0x51 [ 13.224409] [] __schedule+0x6e5/0x810 [ 13.224412] [] schedule+0x24/0x70 [ 13.224416] [] schedule_hrtimeout_range_clock+0x10c/0x150 [ 13.224420] [] ? update_rmtp+0x60/0x60 [ 13.224424] [] ? hrtimer_start_range_ns+0xf/0x20 [ 13.224429] [] schedule_hrtimeout_range+0xe/0x10 [ 13.224432] [] usleep_range+0x3b/0x40 [ 13.224437] [] bcma_pcie_mdio_read.isra.5+0x8a/0x100 [bcma] [ 13.224442] [] bcma_pcie_mdio_writeread.isra.6.constprop.13+0x25/0x30 [bcma] [ 13.224448] [] bcma_core_pci_power_save+0x49/0x80 [bcma] [ 13.224452] [] bcma_core_pci_up+0x2d/0x60 [bcma] [ 13.224460] [] brcms_c_up+0xfc/0x430 [brcmsmac] [ 13.224467] [] brcms_up+0x1d/0x20 [brcmsmac] [ 13.224473] [] brcms_ops_start+0x298/0x340 [brcmsmac] [ 13.224478] [] ? cfg80211_netdev_notifier_call+0xd2/0x5f0 [ 13.224483] [] ? packet_notifier+0xad/0x1d0 [ 13.224487] [] ieee80211_do_open+0x325/0xf80 [ 13.224491] [] ? __raw_notifier_call_chain+0x9/0x10 [ 13.224495] [] ieee80211_open+0x71/0x80 [ 13.224498] [] __dev_open+0x87/0xe0 [ 13.224502] [] __dev_change_flags+0x9c/0x180 [ 13.224505] [] dev_change_flags+0x23/0x70 [ 13.224509] [] devinet_ioctl+0x5b8/0x6a0 [ 13.224512] [] inet_ioctl+0x75/0x90 [ 13.224516] [] sock_do_ioctl+0x2b/0x70 [ 13.224519] [] sock_ioctl+0x71/0x2a0 [ 13.224523] [] do_vfs_ioctl+0x87/0x520 [ 13.224528] [] ? ____fput+0x9/0x10 [ 13.224533] [] ? task_work_run+0x9c/0xd0 [ 13.224537] [] SyS_ioctl+0x91/0xb0 [ 13.224541] [] system_call_fastpath+0x16/0x1b Cc: # 3.11.x Cc: Tod Jackson Cc: Joe Perches Cc: Rafal Milecki Cc: Hauke Mehrtens Reviewed-by: Hante Meuleman Signed-off-by: Arend van Spriel Signed-off-by: John W. Linville --- drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.c') diff --git a/drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.c b/drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.c index 3a6544710c8a..edc5d105ff98 100644 --- a/drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.c +++ b/drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.c @@ -457,6 +457,8 @@ static int brcms_ops_start(struct ieee80211_hw *hw) if (err != 0) brcms_err(wl->wlc->hw->d11core, "%s: brcms_up() returned %d\n", __func__, err); + + bcma_core_pci_power_save(wl->wlc->hw->d11core->bus, true); return err; } @@ -479,6 +481,8 @@ static void brcms_ops_stop(struct ieee80211_hw *hw) return; } + bcma_core_pci_power_save(wl->wlc->hw->d11core->bus, false); + /* put driver in down state */ spin_lock_bh(&wl->lock); brcms_down(wl); -- cgit v1.2.2