From: Yong Zhi Date: Mon, 13 Aug 2018 23:15:14 +0000 (-0500) Subject: ASoC: Intel: Skylake: Acquire irq after RIRB allocation X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=12eeeb4f4733bbc4481d01df35933fc15beb8b19;p=openwrt%2Fstaging%2Fblogic.git ASoC: Intel: Skylake: Acquire irq after RIRB allocation Cold reboot stress test found that the hda irq could access rirb ring buffer before its memory gets allocated which resulting in null pointer dereference inside snd_hdac_bus_update_rirb(). Fix it by moving the skl_acquire_irq after ring buffer allocation. While here, also change err return from -EBUSY to actual error code. Signed-off-by: Yong Zhi Acked-by: Pierre-Louis Bossart Signed-off-by: Mark Brown --- diff --git a/sound/soc/intel/skylake/skl.c b/sound/soc/intel/skylake/skl.c index dce649485649..cf09721ca13e 100644 --- a/sound/soc/intel/skylake/skl.c +++ b/sound/soc/intel/skylake/skl.c @@ -838,11 +838,7 @@ static int skl_first_init(struct hdac_bus *bus) snd_hdac_bus_parse_capabilities(bus); - if (skl_acquire_irq(bus, 0) < 0) - return -EBUSY; - pci_set_master(pci); - synchronize_irq(bus->irq); gcap = snd_hdac_chip_readw(bus, GCAP); dev_dbg(bus->dev, "chipset global capabilities = 0x%x\n", gcap); @@ -875,6 +871,12 @@ static int skl_first_init(struct hdac_bus *bus) if (err < 0) return err; + err = skl_acquire_irq(bus, 0); + if (err < 0) + return err; + + synchronize_irq(bus->irq); + /* initialize chip */ skl_init_pci(skl);