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867258d3f3
kernel_optimize_test/kernel/dma
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Randy Dunlap 867258d3f3 dma-debug: fix return value of __setup handlers 
[ Upstream commit 80e4390981618e290616dbd06ea190d4576f219d ]

When valid kernel command line parameters
  dma_debug=off dma_debug_entries=100
are used, they are reported as Unknown parameters and added to init's
environment strings, polluting it.

  Unknown kernel command line parameters "BOOT_IMAGE=/boot/bzImage-517rc5
    dma_debug=off dma_debug_entries=100", will be passed to user space.

and

 Run /sbin/init as init process
   with arguments:
     /sbin/init
   with environment:
     HOME=/
     TERM=linux
     BOOT_IMAGE=/boot/bzImage-517rc5
     dma_debug=off
     dma_debug_entries=100

Return 1 from these __setup handlers to indicate that the command line
option has been handled.

Fixes: 59d3daafa1 ("dma-debug: add kernel command line parameters")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: Igor Zhbanov <i.zhbanov@omprussia.ru>
Link: lore.kernel.org/r/64644a2f-4a20-bab3-1e15-3b2cdd0defe3@omprussia.ru
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: iommu@lists.linux-foundation.org
Cc: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-04-08 14:40:25 +02:00
..
coherent.c dma-mapping: split <linux/dma-mapping.h> 2020-10-06 07:07:03 +02:00
contiguous.c dma-mapping updates for 5.10 2020-10-15 14:43:29 -07:00
debug.c dma-debug: fix return value of __setup handlers 2022-04-08 14:40:25 +02:00
debug.h dma-mapping: move dma-debug.h to kernel/dma/ 2020-10-06 07:07:05 +02:00
direct.c kernel/: fix repeated words in comments 2020-10-16 11:11:19 -07:00
direct.h dma-mapping: move large parts of <linux/dma-direct.h> to kernel/dma 2020-10-06 07:07:06 +02:00
dummy.c dma-mapping: split <linux/dma-mapping.h> 2020-10-06 07:07:03 +02:00
Kconfig dma-mapping: merge <linux/dma-contiguous.h> into <linux/dma-map-ops.h> 2020-10-06 07:07:04 +02:00
Makefile dma-mapping: move dma_common_{mmap,get_sgtable} out of mapping.c 2020-09-11 09:14:56 +02:00
mapping.c dma-mapping: move large parts of <linux/dma-direct.h> to kernel/dma 2020-10-06 07:07:06 +02:00
ops_helpers.c dma-mapping: handle vmalloc addresses in dma_common_{mmap,get_sgtable} 2021-07-28 14:35:38 +02:00
pool.c dma/pool: create dma atomic pool only if dma zone has managed pages 2022-01-27 10:53:44 +01:00
remap.c dma-mapping: move more functions to dma-map-ops.h 2020-10-20 10:41:07 +02:00
swiotlb.c swiotlb: fix info leak with DMA_FROM_DEVICE 2022-04-08 14:39:46 +02:00
virt.c dma-mapping: split <linux/dma-mapping.h> 2020-10-06 07:07:03 +02:00