• Mohammed Shafi Shajakhan's avatar
    ath9k: Fix a dma warning/memory leak · ba542385
    Mohammed Shafi Shajakhan authored
    proper dma_unmapping and freeing of skb's has to be done in the rx
    cleanup for EDMA chipsets when the device is unloaded and this also
    seems to address the following warning which shows up occasionally when
    the device is unloaded
    
    	Call Trace:
    	[<c0148cd2>] warn_slowpath_common+0x72/0xa0
    	[<c03b669c>] ? dma_debug_device_change+0x19c/0x200
    	[<c03b669c>] ? dma_debug_device_change+0x19c/0x200
    	[<c0148da3>] warn_slowpath_fmt+0x33/0x40
    	[<c03b669c>] dma_debug_device_change+0x19c/0x200
    	[<c0657f12>] notifier_call_chain+0x82/0xb0
    	[<c0171370>] __blocking_notifier_call_chain+0x60/0x90
    	[<c01713bf>] blocking_notifier_call_chain+0x1f/0x30
    	[<c044f594>] __device_release_driver+0xa4/0xc0
    	[<c044f647>] driver_detach+0x97/0xa0
    	[<c044e65c>] bus_remove_driver+0x6c/0xe0
    	[<c029af0b>] ? sysfs_addrm_finish+0x4b/0x60
    	[<c0450109>] driver_unregister+0x49/0x80
    	[<c0299f54>] ? sysfs_remove_file+0x14/0x20
    	[<c03c3ab2>] pci_unregister_driver+0x32/0x80
    	[<f92c2162>] ath_pci_exit+0x12/0x20 [ath9k]
    	[<f92c8467>] ath9k_exit+0x17/0x36 [ath9k]
    	[<c06523cd>] ? mutex_unlock+0xd/0x10
    	[<c018e27f>] sys_delete_module+0x13f/0x200
    	[<c02139bb>] ? sys_munmap+0x4b/0x60
    	[<c06547c5>] ? restore_all+0xf/0xf
    	[<c0657a20>] ? spurious_fault+0xe0/0xe0
    	[<c01832f4>] ? trace_hardirqs_on_caller+0xf4/0x180
    	[<c065b863>] sysenter_do_call+0x12/0x38
    	 ---[ end trace 16e1c1521c06bcf9 ]---
    	Mapped at:
    	[<c03b7938>] debug_dma_map_page+0x48/0x120
    	[<f92ba3e8>] ath_rx_init+0x3f8/0x4b0 [ath9k]
    	[<f92b5ae4>] ath9k_init_device+0x4c4/0x7b0 [ath9k]
    	[<f92c2813>] ath_pci_probe+0x263/0x330 [ath9k]
    Signed-off-by: default avatarMohammed Shafi Shajakhan <mohammed@qca.qualcomm.com>
    Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
    ba542385
recv.c 53.8 KB