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Subject[PATCH] clarify why DMA gets disabled on broken drives
Alan,

I just ran into this and had to look at the sources to find out why
the IDE driver was turning off DMA for a particular drive.

(It's nice to see that this actually works, btw. 8))

-
Tomas Szepe <szepe@pinerecords.com>

Patch against 2.4.22-rc1.

diff -urN a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
--- a/drivers/ide/ide-dma.c 2003-08-05 23:20:48.000000000 +0200
+++ b/drivers/ide/ide-dma.c 2003-08-05 23:24:22.000000000 +0200
@@ -835,7 +835,8 @@
#ifdef CONFIG_IDEDMA_NEW_DRIVE_LISTINGS
int blacklist = in_drive_list(id, drive_blacklist);
if (blacklist) {
- printk("%s: Disabling (U)DMA for %s\n", drive->name, id->model);
+ printk("%s: Disabling (U)DMA for %s (on blacklist)\n",
+ drive->name, id->model);
return(blacklist);
}
#else /* !CONFIG_IDEDMA_NEW_DRIVE_LISTINGS */
@@ -844,7 +845,7 @@
list = bad_dma_drives;
while (*list) {
if (!strcmp(*list++,id->model)) {
- printk("%s: Disabling (U)DMA for %s\n",
+ printk("%s: Disabling (U)DMA for %s (on blacklist)\n",
drive->name, id->model);
return 1;
}
-
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