ALSA: hdsp - Fix zero division

patch 2a3988f6d2c5be9d02463097775d1c66a8290527 in mainline.

Fix zero-division bug in the calculation dds offset.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Cc: Maarten Bressers <mbressers@gmail.com>
Cc: gentoo kernel <kernel@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/sound/pci/rme9652/hdsp.c b/sound/pci/rme9652/hdsp.c
index 3b3ef657f73eb86e323e69f423bcec58eb884f56..75dcb9acee99092d5d751b77b2a18a2138cde8d5 100644 (file)
--- a/sound/pci/rme9652/hdsp.c
+++ b/sound/pci/rme9652/hdsp.c
@@ -3108,6 +3108,9 @@ static int hdsp_dds_offset(struct hdsp *hdsp)
        unsigned int dds_value = hdsp->dds_value;
        int system_sample_rate = hdsp->system_sample_rate;
 
+       if (!dds_value)
+               return 0;
+
        n = DDS_NUMERATOR;
        /*
         * dds_value = n / rate