Some DSDT-s have an of by one bug where the SINF package count is one higher then 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 --- drivers/platform/x86/panasonic-laptop.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/platform/x86/panasonic-laptop.c b/drivers/platform/x86/panasonic-laptop.c index d7f9017a5a13..4c9e20e1afe8 100644 --- a/drivers/platform/x86/panasonic-laptop.c +++ b/drivers/platform/x86/panasonic-laptop.c @@ -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: %ld SINF-pkg-count: %d\n", + pcc->num_sifr, hkey->package.count); status = AE_ERROR; goto end; } @@ -968,6 +969,12 @@ static int acpi_pcc_hotkey_add(struct acpi_device *device) return -ENODEV; }
+ /* + * Some DSDT-s have an of by one bug where the SINF package count is + * one higher then 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");