dma-debug: add dma_debug_driver kernel command line
This patch add the dma_debug_driver= boot parameter to enable the driver filter for early boot. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Родитель
8a6fc708b9
Коммит
1745de5e56
|
@ -646,6 +646,13 @@ and is between 256 and 4096 characters. It is defined in the file
|
|||
DMA-API debugging code disables itself because the
|
||||
architectural default is too low.
|
||||
|
||||
dma_debug_driver=<driver_name>
|
||||
With this option the DMA-API debugging driver
|
||||
filter feature can be enabled at boot time. Just
|
||||
pass the driver to filter for as the parameter.
|
||||
The filter can be disabled or changed to another
|
||||
driver later using sysfs.
|
||||
|
||||
dscc4.setup= [NET]
|
||||
|
||||
dtc3181e= [HW,SCSI]
|
||||
|
|
|
@ -1109,3 +1109,21 @@ void debug_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
|
|||
}
|
||||
EXPORT_SYMBOL(debug_dma_sync_sg_for_device);
|
||||
|
||||
static int __init dma_debug_driver_setup(char *str)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < NAME_MAX_LEN - 1; ++i, ++str) {
|
||||
current_driver_name[i] = *str;
|
||||
if (*str == 0)
|
||||
break;
|
||||
}
|
||||
|
||||
if (current_driver_name[0])
|
||||
printk(KERN_INFO "DMA-API: enable driver filter for "
|
||||
"driver [%s]\n", current_driver_name);
|
||||
|
||||
|
||||
return 1;
|
||||
}
|
||||
__setup("dma_debug_driver=", dma_debug_driver_setup);
|
||||
|
|
Загрузка…
Ссылка в новой задаче