Hello.
On 11/30/2016 08:20 PM, Matthew Whitehead wrote:
If there is no PCI bus detected in drivers/ata/pata_legacy.c, it registers all
the common legacy PATA devices. This includes I/O ports (0x1f0, 0x170, 0x1e8,
0x168, 0x1e0, 0x160) and also their associated interrupts (14,15,11,10,8,12).
Unfortunately, on such systems those interrupt lines are at a premium because
there is no PCI alternative. This patch allows you to disable individual
port/interrupt pairs by providing a list of ports to skip allocating.
modprobe pata_legacy ignore_ports=0x1e8,0x168,0x1e0,0x160
Signed-off-by: Matthew Whitehead <tedheadster@xxxxxxxxx>
---
drivers/ata/pata_legacy.c | 30 ++++++++++++++++++++++++------
1 files changed, 24 insertions(+), 6 deletions(-)
diff --git a/drivers/ata/pata_legacy.c b/drivers/ata/pata_legacy.c
index 4fe9d21..65a33b4 100644
--- a/drivers/ata/pata_legacy.c
+++ b/drivers/ata/pata_legacy.c
@@ -130,6 +130,8 @@ static struct legacy_data legacy_data[NR_HOST];
static struct ata_host *legacy_host[NR_HOST];
static int nr_legacy_host;
+static int ignore_ports[NR_HOST];
+static int ignore_ports_count;
It's ignore_port_count if my grammar serves still. :-)
static int probe_all; /* Set to check all ISA port ranges */
static int ht6560a; /* HT 6560A on primary 1, second 2, both 3 */
@@ -1168,6 +1170,16 @@ static __init void probe_qdi_vlb(void)
}
}
+static bool port_ignored(int port)
+{
+ int i;
Need empty line here.
+ for (i = 0; i < ignore_ports_count; i++) {
+ if (port == ignore_ports[i])
+ return 1;
s/1/true/.
+ }
+ return 0;
s/0/false/.
[...]
MBR, Sergei
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