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authorRex Zhang <[email protected]>2023-12-12 10:21:58 +0800
committerVinod Koul <[email protected]>2023-12-21 21:47:40 +0530
commite271c0ba3f919c48e90c64b703538fbb7865cb63 (patch)
treea162e5b4b3d92510aab52deeb9e1ec1742768e4d /drivers/gpu/drm
parent3b08b3775593442be52cbb99efbccbd7fe4fa3fe (diff)
dmaengine: idxd: Move dma_free_coherent() out of spinlocked context
Task may be rescheduled within dma_free_coherent(). So dma_free_coherent() can't be called between spin_lock() and spin_unlock() to avoid Call Trace: Call Trace: <TASK> dump_stack_lvl+0x37/0x50 __might_resched+0x16a/0x1c0 vunmap+0x2c/0x70 __iommu_dma_free+0x96/0x100 idxd_device_evl_free+0xd5/0x100 [idxd] device_release_driver_internal+0x197/0x200 unbind_store+0xa1/0xb0 kernfs_fop_write_iter+0x120/0x1c0 vfs_write+0x2d3/0x400 ksys_write+0x63/0xe0 do_syscall_64+0x44/0xa0 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 Move it out of the context. Fixes: 244da66cda35 ("dmaengine: idxd: setup event log configuration") Signed-off-by: Rex Zhang <[email protected]> Reviewed-by: Dave Jiang <[email protected]> Reviewed-by: Fenghua Yu <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Vinod Koul <[email protected]>
Diffstat (limited to 'drivers/gpu/drm')
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