Eric Lee / linux-smarc-t335x-v3.2

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Commit 5ee00bd4691e7364bb7b62e2068d473cd5cb9320

Authored by Joerg Roedel
1 parent 0bd5c4f7c8
Exists in master and in 4 other branches v3.2_AM335xPSP_04.06.00.11, v3.2_NEWT335xPSP_04.06.00.11, v3.2_SBC_SMARTMEN, v3.2_SMARCT335xPSP_04.06.00.11

dma-debug: add Kconfig entry 

Impact: add a Kconfig entry for DMA-API debugging

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

Showing 2 changed files with 13 additions and 0 deletions Side-by-side Diff

... ... @@ -105,4 +105,7 @@
105 105 help
106 106 The <linux/clk.h> calls support software clock gating and
107 107 thus are a key power management tool on many systems.
  108 +
  109 +config HAVE_DMA_API_DEBUG
  110 + bool
... ... @@ -902,6 +902,17 @@
902 902 debugging for all modules. This mode can be turned off via the above
903 903 disable command.
904 904  
  905 +config DMA_API_DEBUG
  906 + bool "Enable debugging of DMA-API usage"
  907 + depends on HAVE_DMA_API_DEBUG
  908 + help
  909 + Enable this option to debug the use of the DMA API by device drivers.
  910 + With this option you will be able to detect common bugs in device
  911 + drivers like double-freeing of DMA mappings or freeing mappings that
  912 + were never allocated.
  913 + This option causes a performance degredation. Use only if you want
  914 + to debug device drivers. If unsure, say N.
  915 +
905 916 source "samples/Kconfig"
906 917  
907 918 source "lib/Kconfig.kgdb"