4.19-stable patches

added patches:
	pwm-stm32-refuse-too-small-period-requests.patch

diff --git a/queue-4.19/pwm-stm32-refuse-too-small-period-requests.patch b/queue-4.19/pwm-stm32-refuse-too-small-period-requests.patch
new file mode 100644 (file)
index 0000000..6b04528
--- /dev/null
+++ b/queue-4.19/pwm-stm32-refuse-too-small-period-requests.patch
@@ -0,0 +1,42 @@
+From c45fcf46ca2368dafe7e5c513a711a6f0f974308 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= <u.kleine-koenig@baylibre.com>
+Date: Fri, 21 Jun 2024 16:37:12 +0200
+Subject: pwm: stm32: Refuse too small period requests
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+From: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
+
+commit c45fcf46ca2368dafe7e5c513a711a6f0f974308 upstream.
+
+If period_ns is small, prd might well become 0. Catch that case because
+otherwise with
+
+       regmap_write(priv->regmap, TIM_ARR, prd - 1);
+
+a few lines down quite a big period is configured.
+
+Fixes: 7edf7369205b ("pwm: Add driver for STM32 plaftorm")
+Cc: stable@vger.kernel.org
+Reviewed-by: Trevor Gamblin <tgamblin@baylibre.com>
+Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
+Link: https://lore.kernel.org/r/b86f62f099983646f97eeb6bfc0117bb2d0c340d.1718979150.git.u.kleine-koenig@baylibre.com
+Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ drivers/pwm/pwm-stm32.c |    3 +++
+ 1 file changed, 3 insertions(+)
+
+--- a/drivers/pwm/pwm-stm32.c
++++ b/drivers/pwm/pwm-stm32.c
+@@ -337,6 +337,9 @@ static int stm32_pwm_config(struct stm32
+ 
+       prd = div;
+ 
++      if (!prd)
++              return -EINVAL;
++
+       if (prescaler > MAX_TIM_PSC)
+               return -EINVAL;
+ 

diff --git a/queue-4.19/series b/queue-4.19/series
index 581d09ef15c618f537be629fc0c650aed22f8fee..81da71e49bbddb0bb6035b7352e6cbd8c90dc623 100644 (file)
--- a/queue-4.19/series
+++ b/queue-4.19/series
@@ -144,3 +144,4 @@ drm-nouveau-dispnv04-fix-null-pointer-dereference-in-nv17_tv_get_hd_modes.patch
 batman-adv-don-t-accept-tt-entries-for-out-of-spec-vids.patch
 ata-libata-core-fix-double-free-on-error.patch
 ftruncate-pass-a-signed-offset.patch
+pwm-stm32-refuse-too-small-period-requests.patch