linux/kernel/dma
Hamza Mahfooz 510e1a724a dma-debug: prevent an error message from causing runtime problems
For some drivers, that use the DMA API. This error message can be reached
several millions of times per second, causing spam to the kernel's printk
buffer and bringing the CPU usage up to 100% (so, it should be rate
limited). However, since there is at least one driver that is in the
mainline and suffers from the error condition, it is more useful to
err_printk() here instead of just rate limiting the error message (in hopes
that it will make it easier for other drivers that suffer from this issue
to be spotted).

Link: https://lkml.kernel.org/r/fd67fbac-64bf-f0ea-01e1-5938ccfab9d0@arm.com
Reported-by: Jeremy Linton <jeremy.linton@arm.com>
Signed-off-by: Hamza Mahfooz <someguy@effective-light.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-09-13 18:29:24 +02:00
..
coherent.c dma-mapping: make the global coherent pool conditional 2021-08-19 09:02:39 +02:00
contiguous.c dma-contiguous: fix a typo error in a comment 2020-11-27 10:33:42 +01:00
debug.c dma-debug: prevent an error message from causing runtime problems 2021-09-13 18:29:24 +02:00
debug.h dma-mapping: move dma-debug.h to kernel/dma/ 2020-10-06 07:07:05 +02:00
direct.c dma-direct: add support for dma_coherent_default_memory 2021-08-18 16:24:09 +02:00
direct.h swiotlb: split swiotlb_tbl_sync_single 2021-03-17 00:32:01 +00:00
dummy.c dma-mapping: return error code from dma_dummy_map_sg() 2021-08-09 17:13:06 +02:00
Kconfig dma-direct: add support for dma_coherent_default_memory 2021-08-18 16:24:09 +02:00
Makefile dma-mapping updates for 5.11: 2020-12-22 13:19:43 -08:00
map_benchmark.c dma-mapping: benchmark: Add support for multi-pages map/unmap 2021-04-02 16:41:08 +02:00
mapping.c dma-mapping: fix the kerneldoc for dma_map_sg_attrs 2021-09-06 14:40:47 +02:00
ops_helpers.c dma-mapping: handle vmalloc addresses in dma_common_{mmap,get_sgtable} 2021-07-16 11:30:26 +02:00
pool.c dma-pool: no need to check return value of debugfs_create functions 2020-11-27 10:33:42 +01:00
remap.c kernel/dma: remove unnecessary unmap_kernel_range 2021-04-30 11:20:40 -07:00
swiotlb.c swiotlb: manipulate orig_addr when tlb_addr has offset 2021-06-21 08:59:02 -04:00