diff options
| author | Sinan Kaya <okaya@codeaurora.org> | 2016-10-07 01:21:29 +0300 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2016-10-19 16:20:15 +0300 |
| commit | b5b809532e7b070374d98c90f8f423c63f3655f5 (patch) | |
| tree | 282ef58207ec0eed21ac1906080ede322ea4545a /drivers/dma/qcom | |
| parent | 7dcec7577ddbc5677deb5204a8cb8837c32a68cf (diff) | |
| download | linux-b5b809532e7b070374d98c90f8f423c63f3655f5.tar.xz | |
dmaengine: qcom_hidma: remove useless debugfs file removal
Since 'commit acc29fb8f792 ("debugfs: ->d_parent is never NULL or
negative")', HIDMA object removal is no longer working. This is due to
redundant debugfs remove call in hidma_debug_uninit.
debugfs_remove_recursive(dmadev->debugfs);
debugfs_remove_recursive(dmadev->stats);
The first remove is for the directory. Second remove is for the file under
the directory. The directory remove makes file remove invalid.
Unable to handle kernel NULL pointer dereference at virtual address
[<ffff00000889f480>] down_write+0x18/0x68
[<ffff00000831c220>] debugfs_remove_recursive+0x50/0x1c0
[<ffff00000848e0a8>] hidma_debug_uninit+0x20/0x30
[<ffff00000848c5d8>] hidma_remove+0x48/0x98
[<ffff000008511b6c>] platform_drv_remove+0x24/0x68
[<ffff00000850fac8>] __device_release_driver+0x80/0x118
[<ffff00000850fb84>] device_release_driver+0x24/0x38
[<ffff00000850e928>] unbind_store+0xe8/0x110
[<ffff00000850dd30>] drv_attr_store+0x20/0x30
[<ffff000008253a48>] sysfs_kf_write+0x48/0x58
[<ffff000008252dd8>] kernfs_fop_write+0xb0/0x1d8
[<ffff0000081dab3c>] __vfs_write+0x1c/0x110
[<ffff0000081db940>] vfs_write+0xa0/0x1b8
[<ffff0000081dcd34>] SyS_write+0x44/0xa0
[<ffff000008082ef0>] el0_svc_naked+0x24/0x28
Removing the second line.
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/qcom')
| -rw-r--r-- | drivers/dma/qcom/hidma_dbg.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/dma/qcom/hidma_dbg.c b/drivers/dma/qcom/hidma_dbg.c index fa827e5ffd68..3d83b9962220 100644 --- a/drivers/dma/qcom/hidma_dbg.c +++ b/drivers/dma/qcom/hidma_dbg.c @@ -164,7 +164,6 @@ static const struct file_operations hidma_dma_fops = { void hidma_debug_uninit(struct hidma_dev *dmadev) { debugfs_remove_recursive(dmadev->debugfs); - debugfs_remove_recursive(dmadev->stats); } int hidma_debug_init(struct hidma_dev *dmadev) |