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3532e5660f
Check DMA mapping return values in function ioat_dma_self_test() to get rid of following warning message. ------------[ cut here ]------------ WARNING: CPU: 0 PID: 1203 at lib/dma-debug.c:937 check_unmap+0x4c0/0x9a0() ioatdma 0000:00:04.0: DMA-API: device driver failed to check map error[device address=0x000000085191b000] [size=2000 bytes] [mapped as single] Modules linked in: ioatdma(+) mac_hid wmi acpi_pad lp parport hidd_generic usbhid hid ixgbe isci dca libsas ahci ptp libahci scsi_transport_sas meegaraid_sas pps_core mdio CPU: 0 PID: 1203 Comm: systemd-udevd Not tainted 3.13.0-rc4+ #8 Hardware name: Intel Corporation BRICKLAND/BRICKLAND, BIOS BRIVTIIN1.86B.0044.L09.1311181644 11/18/2013 Call Trace: dump_stack+0x4d/0x66 warn_slowpath_common+0x7d/0xa0 warn_slowpath_fmt+0x4c/0x50 check_unmap+0x4c0/0x9a0 debug_dma_unmap_page+0x81/0x90 ioat_dma_self_test+0x3d2/0x680 [ioatdma] ioat3_dma_self_test+0x12/0x30 [ioatdma] ioat_probe+0xf4/0x110 [ioatdma] ioat3_dma_probe+0x268/0x410 [ioatdma] ioat_pci_probe+0x122/0x1b0 [ioatdma] local_pci_probe+0x45/0xa0 pci_device_probe+0xd9/0x130 driver_probe_device+0x171/0x490 __driver_attach+0x93/0xa0 bus_for_each_dev+0x6b/0xb0 driver_attach+0x1e/0x20 bus_add_driver+0x1f8/0x2b0 driver_register+0x81/0x110 __pci_register_driver+0x60/0x70 ioat_init_module+0x89/0x1000 [ioatdma] do_one_initcall+0xe2/0x250 load_module+0x2313/0x2a00 SyS_init_module+0xd9/0x130 system_call_fastpath+0x1a/0x1f ---[ end trace 990c591681d27c31 ]--- Mapped at: debug_dma_map_page+0xbe/0x180 ioat_dma_self_test+0x1ab/0x680 [ioatdma] ioat3_dma_self_test+0x12/0x30 [ioatdma] ioat_probe+0xf4/0x110 [ioatdma] ioat3_dma_probe+0x268/0x410 [ioatdma] Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Cc: Vinod Koul <vinod.koul@intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Cc: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>