@@ -16,6 +16,7 @@
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/irq.h>
+#include <linux/dmi.h>
#ifdef CONFIG_X86
#define valid_IRQ(i) (((i) != 0) && ((i) != 2))
@@ -380,9 +381,51 @@ unsigned int acpi_dev_get_irq_type(int triggering, int polarity)
}
EXPORT_SYMBOL_GPL(acpi_dev_get_irq_type);
+static const struct dmi_system_id medion_laptop[] = {
+ {
+ .ident = "MEDION P15651",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
+ DMI_MATCH(DMI_BOARD_NAME, "M15T"),
+ },
+ },
+ { }
+};
+
+struct irq_override_cmp {
+ const struct dmi_system_id *system;
+ unsigned char irq;
+ unsigned char triggering;
+ unsigned char polarity;
+ unsigned char shareable;
+};
+
+static const struct irq_override_cmp skip_override_table[] = {
+ { medion_laptop, 1, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 0 },
+};
+
+static bool acpi_dev_irq_override(u32 gsi, u8 triggering, u8 polarity,
+ u8 shareable)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(skip_override_table); i++) {
+ const struct irq_override_cmp *entry = &skip_override_table[i];
+
+ if (dmi_check_system(entry->system) &&
+ entry->irq == gsi &&
+ entry->triggering == triggering &&
+ entry->polarity == polarity &&
+ entry->shareable == shareable)
+ return false;
+ }
+
+ return true;
+}
+
static void acpi_dev_get_irqresource(struct resource *res, u32 gsi,
u8 triggering, u8 polarity, u8 shareable,
- bool legacy)
+ bool check_override)
{
int irq, p, t;
@@ -401,7 +444,9 @@ static void acpi_dev_get_irqresource(struct resource *res, u32 gsi,
* using extended IRQ descriptors we take the IRQ configuration
* from _CRS directly.
*/
- if (legacy && !acpi_get_override_irq(gsi, &t, &p)) {
+ if (check_override &&
+ acpi_dev_irq_override(gsi, triggering, polarity, shareable) &&
+ !acpi_get_override_irq(gsi, &t, &p)) {
u8 trig = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
u8 pol = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
BugLink: https://bugs.launchpad.net/bugs/1950536 After the commit 0ec4e55e9f57 ("ACPI: resources: Add checks for ACPI IRQ override") is reverted, the keyboard on Medion laptops can't work again. To fix the keyboard issue, add a DMI-based override check that will not affect other machines along the lines of prt_quirks[] in drivers/acpi/pci_irq.c. If similar issues are seen on other platforms, the quirk table could be expanded in the future. BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=213031 BugLink: http://bugs.launchpad.net/bugs/1909814 Suggested-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reported-by: Manuel Krause <manuelkrause@netscape.net> Tested-by: Manuel Krause <manuelkrause@netscape.net> Signed-off-by: Hui Wang <hui.wang@canonical.com> [ rjw: Subject and changelog edits ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> (cherry picked from commit 892a012699fc0b91a2ed6309078936191447f480) Signed-off-by: Hui Wang <hui.wang@canonical.com> --- drivers/acpi/resource.c | 49 +++++++++++++++++++++++++++++++++++++++-- 1 file changed, 47 insertions(+), 2 deletions(-)