@@ -337,7 +337,8 @@ static int acpi_pcc_retrieve_biosdata(struct pcc_acpi *pcc)
}
if (pcc->num_sifr < hkey->package.count) {
- pr_err("SQTY reports bad SINF length\n");
+ pr_err("SQTY reports bad SINF length SQTY: %lu SINF-pkg-count: %u\n",
+ pcc->num_sifr, hkey->package.count);
status = AE_ERROR;
goto end;
}
@@ -994,6 +995,12 @@ static int acpi_pcc_hotkey_add(struct acpi_device *device)
return -ENODEV;
}
+ /*
+ * Some DSDT-s have an off-by-one bug where the SINF package count is
+ * one higher than the SQTY reported value, allocate 1 entry extra.
+ */
+ num_sifr++;
+
pcc = kzalloc(sizeof(struct pcc_acpi), GFP_KERNEL);
if (!pcc) {
pr_err("Couldn't allocate mem for pcc");
Some DSDT-s have an off-by-one bug where the SINF package count is one higher than the SQTY reported value, allocate 1 entry extra. Also make the SQTY <-> SINF package count mismatch error more verbose to help debugging similar issues in the future. This fixes the panasonic-laptop driver failing to probe() on some devices with the following errors: [ 3.958887] SQTY reports bad SINF length SQTY: 37 SINF-pkg-count: 38 [ 3.958892] Couldn't retrieve BIOS data [ 3.983685] Panasonic Laptop Support - With Macros: probe of MAT0019:00 failed with error -5 Fixes: 709ee531c153 ("panasonic-laptop: add Panasonic Let's Note laptop extras driver v0.94") Cc: stable@vger.kernel.org Tested-by: James Harmison <jharmison@redhat.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> --- Changes in v2: - Fix "off-by-one", "than" spelling - Use %u to log unsigned numbers --- drivers/platform/x86/panasonic-laptop.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)