The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-4.19.y git checkout FETCH_HEAD git cherry-pick -x 33297cef3101d950cec0033a0dce0a2d2bd59999 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2024091305-rephrase-pastime-be42@gregkh' --subject-prefix 'PATCH 4.19.y' HEAD^..

Possible dependencies:

33297cef3101 ("platform/x86: panasonic-laptop: Allocate 1 entry extra in the sinf array") f1aaf914654a ("platform/x86: panasonic-laptop: Replace ACPI prints with pr_*() macros") d5a81d8e864b ("platform/x86: panasonic-laptop: Add support for optical driver power in Y and W series")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 33297cef3101d950cec0033a0dce0a2d2bd59999 Mon Sep 17 00:00:00 2001 From: Hans de Goede hdegoede@redhat.com Date: Mon, 9 Sep 2024 13:32:26 +0200 Subject: [PATCH] platform/x86: panasonic-laptop: Allocate 1 entry extra in the sinf array MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit

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 Link: https://lore.kernel.org/r/20240909113227.254470-2-hdegoede@redhat.com Reviewed-by: Ilpo Järvinen ilpo.jarvinen@linux.intel.com Signed-off-by: Ilpo Järvinen ilpo.jarvinen@linux.intel.com

diff --git a/drivers/platform/x86/panasonic-laptop.c b/drivers/platform/x86/panasonic-laptop.c index 39044119d2a6..ebd81846e2d5 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: %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");