Mohammed Shafi Shajakhan 02a9e08d73 ath10k: Avoid potential page alloc BUG_ON in tx free path ... 'ath10k_htt_tx_free_cont_txbuf' and 'ath10k_htt_tx_free_cont_frag_desc' have NULL pointer checks to avoid crash if they are called twice but this is as of now not sufficient as these pointers are not assigned to NULL once the contiguous DMA memory allocation is freed, fix this. Though this may not be hit with the explicity check of state variable 'tx_mem_allocated' check, good to have this addressed as well. Below BUG_ON is hit when the above scenario is simulated with kernel debugging enabled page:f6d09a00 count:0 mapcount:-127 mapping: (null) index:0x0 flags: 0x40000000() page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) == 0) ------------[ cut here ]------------ kernel BUG at ./include/linux/mm.h:445! invalid opcode: 0000 [#1] SMP DEBUG_PAGEALLOC EIP is at put_page_testzero.part.88+0xd/0xf Call Trace: [<c118a2cc>] __free_pages+0x3c/0x40 [<c118a30e>] free_pages+0x3e/0x50 [<c10222b4>] dma_generic_free_coherent+0x24/0x30 [<f8c1d9a8>] ath10k_htt_tx_free_cont_txbuf+0xf8/0x140 [<f8c1e2a9>] ath10k_htt_tx_destroy+0x29/0xa0 [<f8c143e0>] ath10k_core_destroy+0x60/0x80 [ath10k_core] [<f8acd7e9>] ath10k_pci_remove+0x79/0xa0 [ath10k_pci] [<c13ed7a8>] pci_device_remove+0x38/0xb0 [<c14d3492>] __device_release_driver+0x72/0x100 [<c14d36b7>] driver_detach+0x97/0xa0 [<c14d29c0>] bus_remove_driver+0x40/0x80 [<c14d427a>] driver_unregister+0x2a/0x60 [<c13ec768>] pci_unregister_driver+0x18/0x70 [<f8aced4f>] ath10k_pci_exit+0xd/0x2be [ath10k_pci] [<c1101e78>] SyS_delete_module+0x158/0x210 [<c11b34f1>] ? __might_fault+0x41/0xa0 [<c11b353b>] ? __might_fault+0x8b/0xa0 [<c1001a4b>] do_fast_syscall_32+0x9b/0x1c0 [<c178da34>] sysenter_past_esp+0x45/0x74 Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qti.qualcomm.com> Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>		2016-12-15 11:17:52 +02:00
..
ar5523	net: wireless: ath: ar5523: ar5523: don't print error when allocating urb fails	2016-08-13 14:53:40 -07:00
ath5k	ath5k: drop duplicate header vmalloc.h	2016-12-01 13:23:19 +02:00
ath6kl	wireless-drivers-next patches for 4.10	2016-11-27 20:26:59 -05:00
ath9k	ath9k: Turn ath_txq_lock/unlock() into static inlines.	2016-12-15 10:44:04 +02:00
ath10k	ath10k: Avoid potential page alloc BUG_ON in tx free path	2016-12-15 11:17:52 +02:00
carl9170	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2016-10-05 10:11:24 -07:00
wcn36xx	wcn36xx: Silence error about unsupported smd event 188	2016-07-08 17:04:40 +03:00
wil6210	wil6210: align to latest auto generated wmi.h	2016-12-01 13:20:41 +02:00
ath.h	ath9k: add a helper to get the string representation of ath_bus_type	2016-11-15 16:55:37 +02:00
debug.c	ath: Make ath_opmode_to_string understand OCB mode	2015-08-10 22:21:15 +03:00
dfs_pattern_detector.c	ath: constify local structures	2016-09-14 20:01:39 +03:00
dfs_pattern_detector.h	ath: use PRI value given by spec for fixed PRI	2015-09-27 15:50:30 +03:00
dfs_pri_detector.c	ath: use PRI value given by spec for fixed PRI	2015-09-27 15:50:30 +03:00
dfs_pri_detector.h
hw.c
Kconfig	ath: unify Kconfig with other vendors	2015-11-18 14:28:31 +02:00
key.c
main.c	ath9k: add a helper to get the string representation of ath_bus_type	2016-11-15 16:55:37 +02:00
Makefile
reg.h
regd_common.h
regd.c	ath: export alpha2 helper	2016-10-04 18:01:48 +03:00
regd.h	ath: export alpha2 helper	2016-10-04 18:01:48 +03:00
spectral_common.h
trace.c
trace.h