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Subject[PATCH 3/4] dma-debug: add dma_debug_driver kernel command line
Date
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>
---
lib/dma-debug.c | 19 +++++++++++++++++++
1 files changed, 19 insertions(+), 0 deletions(-)
diff --git a/lib/dma-debug.c b/lib/dma-debug.c
index 65043c7..7b51fa4 100644
--- a/lib/dma-debug.c
+++ b/lib/dma-debug.c
@@ -1098,3 +1098,22 @@ void debug_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
}
EXPORT_SYMBOL(debug_dma_sync_sg_for_device);

+static int __init parse_dma_debug_driver(char *str)
+{
+ int i;
+
+ for (i = 0; i < NAME_MAX_LEN - 1; ++i, ++str) {
+ current_driver_name[i] = *str;
+ if (*str == ' ' || *str == '\t' || isspace(*str) || *str == 0)
+ break;
+ }
+ current_driver_name[i] = 0;
+
+ 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=", parse_dma_debug_driver);
--
1.6.3.1



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