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[PATCH 3.19.y-ckt 62/99] rtlwifi: pci: use dev_kfree_skb_irq instead of kfree_skb in rtl_pci_reset_trx_ring

From Kamal Mostafa <kamal@canonical.com>
Newsgroups linux.kernel
Subject [PATCH 3.19.y-ckt 62/99] rtlwifi: pci: use dev_kfree_skb_irq instead of kfree_skb in rtl_pci_reset_trx_ring
Date 2016-07-07 21:00 +0200
Message-ID <rSmGK-2kd-43@gated-at.bofh.it> (permalink)
References <rSmnn-2ax-3@gated-at.bofh.it>
Organization linux.* mail to news gateway

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3.19.8-ckt23 -stable review patch.  If anyone has any objections, please let me know.

---8<------------------------------------------------------------

From: wang yanqing <udknight@gmail.com>

commit cf968937d27751296920e6b82ffa89735e3a0023 upstream.

We can't use kfree_skb in irq disable context, because spin_lock_irqsave
make sure we are always in irq disable context, use dev_kfree_skb_irq
instead of kfree_skb is better than dev_kfree_skb_any.

This patch fix below kernel warning:
[ 7612.095528] ------------[ cut here ]------------
[ 7612.095546] WARNING: CPU: 3 PID: 4460 at kernel/softirq.c:150 __local_bh_enable_ip+0x58/0x80()
[ 7612.095550] Modules linked in: rtl8723be x86_pkg_temp_thermal btcoexist rtl_pci rtlwifi rtl8723_common
[ 7612.095567] CPU: 3 PID: 4460 Comm: ifconfig Tainted: G        W       4.4.0+ #4
[ 7612.095570] Hardware name: LENOVO 20DFA04FCD/20DFA04FCD, BIOS J5ET48WW (1.19 ) 08/27/2015
[ 7612.095574]  00000000 00000000 da37fc70 c12ce7c5 00000000 da37fca0 c104cc59 c19d4454
[ 7612.095584]  00000003 0000116c c19d4784 00000096 c10508a8 c10508a8 00000200 c1b42400
[ 7612.095594]  f29be780 da37fcb0 c104ccad 00000009 00000000 da37fcbc c10508a8 f21f08b8
[ 7612.095604] Call Trace:
[ 7612.095614]  [<c12ce7c5>] dump_stack+0x41/0x5c
[ 7612.095620]  [<c104cc59>] warn_slowpath_common+0x89/0xc0
[ 7612.095628]  [<c10508a8>] ? __local_bh_enable_ip+0x58/0x80
[ 7612.095634]  [<c10508a8>] ? __local_bh_enable_ip+0x58/0x80
[ 7612.095640]  [<c104ccad>] warn_slowpath_null+0x1d/0x20
[ 7612.095646]  [<c10508a8>] __local_bh_enable_ip+0x58/0x80
[ 7612.095653]  [<c16b7d34>] destroy_conntrack+0x64/0xa0
[ 7612.095660]  [<c16b300f>] nf_conntrack_destroy+0xf/0x20
[ 7612.095665]  [<c1677565>] skb_release_head_state+0x55/0xa0
[ 7612.095670]  [<c16775bb>] skb_release_all+0xb/0x20
[ 7612.095674]  [<c167760b>] __kfree_skb+0xb/0x60
[ 7612.095679]  [<c16776f0>] kfree_skb+0x30/0x70
[ 7612.095686]  [<f81b869d>] ? rtl_pci_reset_trx_ring+0x22d/0x370 [rtl_pci]
[ 7612.095692]  [<f81b869d>] rtl_pci_reset_trx_ring+0x22d/0x370 [rtl_pci]
[ 7612.095698]  [<f81b87f9>] rtl_pci_start+0x19/0x190 [rtl_pci]
[ 7612.095705]  [<f81970e6>] rtl_op_start+0x56/0x90 [rtlwifi]
[ 7612.095712]  [<c17e3f16>] drv_start+0x36/0xc0
[ 7612.095717]  [<c17f5ab3>] ieee80211_do_open+0x2d3/0x890
[ 7612.095725]  [<c16820fe>] ? call_netdevice_notifiers_info+0x2e/0x60
[ 7612.095730]  [<c17f60bd>] ieee80211_open+0x4d/0x50
[ 7612.095736]  [<c16891b3>] __dev_open+0xa3/0x130
[ 7612.095742]  [<c183fa53>] ? _raw_spin_unlock_bh+0x13/0x20
[ 7612.095748]  [<c1689499>] __dev_change_flags+0x89/0x140
[ 7612.095753]  [<c127c70d>] ? selinux_capable+0xd/0x10
[ 7612.095759]  [<c1689589>] dev_change_flags+0x29/0x60
[ 7612.095765]  [<c1700b93>] devinet_ioctl+0x553/0x670
[ 7612.095772]  [<c12db758>] ? _copy_to_user+0x28/0x40
[ 7612.095777]  [<c17018b5>] inet_ioctl+0x85/0xb0
[ 7612.095783]  [<c166e647>] sock_ioctl+0x67/0x260
[ 7612.095788]  [<c166e5e0>] ? sock_fasync+0x80/0x80
[ 7612.095795]  [<c115c99b>] do_vfs_ioctl+0x6b/0x550
[ 7612.095800]  [<c127c812>] ? selinux_file_ioctl+0x102/0x1e0
[ 7612.095807]  [<c10a8914>] ? timekeeping_suspend+0x294/0x320
[ 7612.095813]  [<c10a256a>] ? __hrtimer_run_queues+0x14a/0x210
[ 7612.095820]  [<c1276e24>] ? security_file_ioctl+0x34/0x50
[ 7612.095827]  [<c115cef0>] SyS_ioctl+0x70/0x80
[ 7612.095832]  [<c1001804>] do_fast_syscall_32+0x84/0x120
[ 7612.095839]  [<c183ff91>] sysenter_past_esp+0x36/0x55
[ 7612.095844] ---[ end trace 97e9c637a20e8348 ]---

Signed-off-by: Wang YanQing <udknight@gmail.com>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
[ kamal: backport to 4.2-stable: files moved ]
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 drivers/net/wireless/rtlwifi/pci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/rtlwifi/pci.c b/drivers/net/wireless/rtlwifi/pci.c
index 348d5aec..2afe4cc 100644
--- a/drivers/net/wireless/rtlwifi/pci.c
+++ b/drivers/net/wireless/rtlwifi/pci.c
@@ -1573,7 +1573,7 @@ int rtl_pci_reset_trx_ring(struct ieee80211_hw *hw)
 							 true,
 							 HW_DESC_TXBUFF_ADDR),
 						 skb->len, PCI_DMA_TODEVICE);
-				kfree_skb(skb);
+				dev_kfree_skb_irq(skb);
 				ring->idx = (ring->idx + 1) % ring->entries;
 			}
 			ring->idx = 0;
-- 
2.7.4

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[3.19.y-ckt stable] Linux 3.19.8-ckt23 stable review Kamal Mostafa <kamal@canonical.com> - 2016-07-07 20:40 +0200
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  [PATCH 3.19.y-ckt 91/99] xen/x86: actually allocate legacy interrupts on PV guests Kamal Mostafa <kamal@canonical.com> - 2016-07-07 20:50 +0200
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  [PATCH 3.19.y-ckt 88/99] mmc: sdhci-acpi: Remove MMC_CAP_BUS_WIDTH_TEST for Intel controllers Kamal Mostafa <kamal@canonical.com> - 2016-07-07 20:50 +0200
  [PATCH 3.19.y-ckt 77/99] remove directory incorrectly tries to set delete on close on non-empty directories Kamal Mostafa <kamal@canonical.com> - 2016-07-07 20:50 +0200
  [PATCH 3.19.y-ckt 71/99] drm/i915/fbdev: Fix num_connector references in intel_fb_initial_config() Kamal Mostafa <kamal@canonical.com> - 2016-07-07 20:50 +0200
  [PATCH 3.19.y-ckt 90/99] wait/ptrace: assume __WALL if the child is traced Kamal Mostafa <kamal@canonical.com> - 2016-07-07 20:50 +0200
  [PATCH 3.19.y-ckt 76/99] fs/cifs: correctly to anonymous authentication for the NTLM(v2) authentication Kamal Mostafa <kamal@canonical.com> - 2016-07-07 20:50 +0200
  [PATCH 3.19.y-ckt 70/99] MIPS: MSA: Fix a link error on `_init_msa_upper' with older GCC Kamal Mostafa <kamal@canonical.com> - 2016-07-07 20:50 +0200
  [PATCH 3.19.y-ckt 98/99] powerpc/pseries: Fix PCI config address for DDW Kamal Mostafa <kamal@canonical.com> - 2016-07-07 20:50 +0200
  [PATCH 3.19.y-ckt 64/99] powerpc/eeh: Restore initial state in eeh_pe_reset_and_recover() Kamal Mostafa <kamal@canonical.com> - 2016-07-07 20:50 +0200
  [PATCH 3.19.y-ckt 83/99] ASoC: ak4642: Enable cache usage to fix crashes on resume Kamal Mostafa <kamal@canonical.com> - 2016-07-07 20:50 +0200
  [PATCH 3.19.y-ckt 93/99] dma-debug: avoid spinlock recursion when disabling dma-debug Kamal Mostafa <kamal@canonical.com> - 2016-07-07 20:50 +0200
  [PATCH 3.19.y-ckt 65/99] MIPS: math-emu: Fix jalr emulation when rd == $0 Kamal Mostafa <kamal@canonical.com> - 2016-07-07 20:50 +0200
  [PATCH 3.19.y-ckt 85/99] PM / sleep: Handle failures in device_suspend_late() consistently Kamal Mostafa <kamal@canonical.com> - 2016-07-07 20:50 +0200
  [PATCH 3.19.y-ckt 97/99] powerpc/iommu: Remove the dependency on EEH struct in DDW mechanism Kamal Mostafa <kamal@canonical.com> - 2016-07-07 20:50 +0200
  [PATCH 3.19.y-ckt 78/99] cpuidle: Fix cpuidle_state_is_coupled() argument in cpuidle_enter() Kamal Mostafa <kamal@canonical.com> - 2016-07-07 20:50 +0200
  [PATCH 3.19.y-ckt 96/99] hpfs: implement the show_options method Kamal Mostafa <kamal@canonical.com> - 2016-07-07 20:50 +0200
  [PATCH 3.19.y-ckt 44/99] MIPS: Don't unwind to user mode with EVA Kamal Mostafa <kamal@canonical.com> - 2016-07-07 20:50 +0200
  [PATCH 3.19.y-ckt 86/99] mmc: longer timeout for long read time quirk Kamal Mostafa <kamal@canonical.com> - 2016-07-07 20:50 +0200
  [PATCH 3.19.y-ckt 01/99] mm: migrate dirty page without clear_page_dirty_for_io etc Kamal Mostafa <kamal@canonical.com> - 2016-07-07 20:50 +0200
  [PATCH 3.19.y-ckt 99/99] can: fix handling of unmodifiable configuration options fix Kamal Mostafa <kamal@canonical.com> - 2016-07-07 20:50 +0200
  [PATCH 3.19.y-ckt 75/99] fs/cifs: correctly to anonymous authentication for the NTLM(v1) authentication Kamal Mostafa <kamal@canonical.com> - 2016-07-07 20:50 +0200
  [PATCH 3.19.y-ckt 69/99] PCI: Disable all BAR sizing for devices with non-compliant BARs Kamal Mostafa <kamal@canonical.com> - 2016-07-07 20:50 +0200
  [PATCH 3.19.y-ckt 36/99] ACPI / osi: Fix an issue that acpi_osi=!* cannot disable ACPICA internal strings Kamal Mostafa <kamal@canonical.com> - 2016-07-07 20:50 +0200
  [PATCH 3.19.y-ckt 94/99] Input: xpad - prevent spurious input from wired Xbox 360 controllers Kamal Mostafa <kamal@canonical.com> - 2016-07-07 20:50 +0200
  [PATCH 3.19.y-ckt 80/99] xfs: fix inode validity check in xfs_iflush_cluster Kamal Mostafa <kamal@canonical.com> - 2016-07-07 20:50 +0200
  [PATCH 3.19.y-ckt 79/99] xfs: xfs_iflush_cluster fails to abort on error Kamal Mostafa <kamal@canonical.com> - 2016-07-07 20:50 +0200
  [PATCH 3.19.y-ckt 68/99] mmc: mmc: Fix partition switch timeout for some eMMCs Kamal Mostafa <kamal@canonical.com> - 2016-07-07 20:50 +0200
  [PATCH 3.19.y-ckt 72/99] drm/fb_helper: Fix references to dev->mode_config.num_connector Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 53/99] USB: serial: quatech2: fix use-after-free in probe error path Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 55/99] MIPS: KVM: Fix timer IRQ race when freezing timer Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 66/99] ring-buffer: Use long for nr_pages to avoid overflow failures Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 46/99] MIPS: Reserve nosave data for hibernation Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 59/99] arm64: cpuinfo: Missing NULL terminator in compat_hwcap_str Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 35/99] USB: serial: option: add even more ZTE device ids Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 58/99] irqchip/gic: Ensure ordering between read of INTACK and shared data Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 33/99] mcb: Fixed bar number assignment for the gdd Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 57/99] gcov: disable tree-loop-im to reduce stack usage Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 42/99] can: fix handling of unmodifiable configuration options Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 34/99] USB: serial: option: add more ZTE device ids Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 24/99] arm/arm64: KVM: Enforce Break-Before-Make on Stage-2 page tables Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 45/99] MIPS: Avoid using unwind_stack() with usermode Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 50/99] USB: serial: io_edgeport: fix memory leaks in probe error path Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 26/99] aacraid: Fix for aac_command_thread hang Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 54/99] crypto: caam - fix caam_jr_alloc() ret code Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 52/99] USB: serial: mxuport: fix use-after-free in probe error path Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 62/99] rtlwifi: pci: use dev_kfree_skb_irq instead of kfree_skb in rtl_pci_reset_trx_ring Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 67/99] ring-buffer: Prevent overflow of size in ring_buffer_resize() Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 38/99] ext4: fix oops on corrupted filesystem Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 56/99] MIPS: KVM: Fix timer IRQ race when writing CP0_Compare Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 47/99] usb: host: xhci-rcar: Avoid long wait in xhci_reset() Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 40/99] ext4: silence UBSAN in ext4_mb_init() Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 61/99] rtlwifi: Fix logic error in enter/exit power-save mode Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 48/99] mfd: omap-usb-tll: Fix scheduling while atomic BUG Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 29/99] QE-UART: add "fsl,t1040-ucc-uart" to of_device_id Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 49/99] USB: serial: io_edgeport: fix memory leaks in attach error path Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 41/99] arm64: Ensure pmd_present() returns false after pmd_mknotpresent() Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 30/99] thunderbolt: Fix double free of drom buffer Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 51/99] USB: serial: keyspan: fix use-after-free in probe error path Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 63/99] powerpc/eeh: Don't report error in eeh_pe_reset_and_recover() Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 60/99] kbuild: move -Wunused-const-variable to W=1 warning level Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 39/99] ext4: address UBSAN warning in mb_find_order_for_block() Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:00 +0200
  [PATCH 3.19.y-ckt 09/99] cpuidle: Indicate when a device has been unregistered Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:10 +0200
  [PATCH 3.19.y-ckt 20/99] pinctrl: exynos5440: Use off-stack memory for pinctrl_gpio_range Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:10 +0200
  [PATCH 3.19.y-ckt 21/99] btrfs: bugfix: handle FS_IOC32_{GETFLAGS,SETFLAGS,GETVERSION} in btrfs_ioctl Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:10 +0200
  [PATCH 3.19.y-ckt 18/99] ath9k: Add a module parameter to invert LED polarity. Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:10 +0200
  [PATCH 3.19.y-ckt 28/99] MIPS: ath79: make bootconsole wait for both THRE and TEMT Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:10 +0200
  [PATCH 3.19.y-ckt 16/99] PM / Runtime: Fix error path in pm_runtime_force_resume() Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:10 +0200
  [PATCH 3.19.y-ckt 17/99] crypto: s5p-sss - Fix missed interrupts when working with 8 kB blocks Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:10 +0200
  [PATCH 3.19.y-ckt 32/99] USB: leave LPM alone if possible when binding/unbinding interface drivers Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:10 +0200
  [PATCH 3.19.y-ckt 12/99] Revert "scsi: fix soft lockup in scsi_remove_target() on module removal" Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:10 +0200
  [PATCH 3.19.y-ckt 10/99] [media] media: v4l2-compat-ioctl32: fix missing reserved field copy in put_v4l2_create32 Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:10 +0200
  [PATCH 3.19.y-ckt 23/99] TTY: n_gsm, fix false positive WARN_ON Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:10 +0200
  [PATCH 3.19.y-ckt 25/99] aacraid: Relinquish CPU during timeout wait Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:10 +0200
  [PATCH 3.19.y-ckt 22/99] usb: core: hub: hub_port_init lock controller instead of bus Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:10 +0200
  [PATCH 3.19.y-ckt 14/99] Bluetooth: vhci: Fix race at creating hci device Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:10 +0200
  [PATCH 3.19.y-ckt 37/99] USB: serial: cp210x: fix hardware flow-control disable Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:10 +0200
  [PATCH 3.19.y-ckt 04/99] ath10k: fix debugfs pktlog_filter write Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:10 +0200
  [PATCH 3.19.y-ckt 02/99] ath10k: fix firmware assert in monitor mode Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:10 +0200
  [PATCH 3.19.y-ckt 19/99] ath9k: Fix LED polarity for some Mini PCI AR9220 MB92 cards. Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:10 +0200
  [PATCH 3.19.y-ckt 11/99] scsi: Add intermediate STARGET_REMOVE state to scsi_target_state Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:10 +0200
  [PATCH 3.19.y-ckt 15/99] powerpc/book3s64: Fix branching to OOL handlers in relocatable kernel Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:10 +0200
  [PATCH 3.19.y-ckt 31/99] USB: serial: option: add support for Cinterion PH8 and AHxx Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:10 +0200
  [PATCH 3.19.y-ckt 13/99] usb: f_mass_storage: test whether thread is running before starting another Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:10 +0200
  [PATCH 3.19.y-ckt 27/99] ext4: fix hang when processing corrupted orphaned inode list Kamal Mostafa <kamal@canonical.com> - 2016-07-07 21:10 +0200

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