From 4a23fc8cc068ee5adfb9939d86baaf0f3e180df6 Mon Sep 17 00:00:00 2001
From: Zhouyang Jia <jiazhouyang09@gmail.com>
Date: Thu, 14 Jun 2018 21:51:46 +0800
Subject: [PATCH] ALSA: lx6464es: add error handling for pci_ioremap_bar
When pci_ioremap_bar fails, the lack of error-handling code may
cause unexpected results.
This patch adds error-handling code after calling pci_ioremap_bar.
Signed-off-by: Zhouyang Jia <jiazhouyang09@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
sound/pci/lx6464es/lx6464es.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/sound/pci/lx6464es/lx6464es.c b/sound/pci/lx6464es/lx6464es.c
index 9655b08a1c52f..6c85f13ab23f1 100644
--- a/sound/pci/lx6464es/lx6464es.c
+++ b/sound/pci/lx6464es/lx6464es.c
@@ -1016,6 +1016,10 @@ static int snd_lx6464es_create(struct snd_card *card,
/* dsp port */
chip->port_dsp_bar = pci_ioremap_bar(pci, 2);
+ if (!chip->port_dsp_bar) {
+ dev_err(card->dev, "cannot remap PCI memory region\n");
+ goto remap_pci_failed;
+ }
err = request_threaded_irq(pci->irq, lx_interrupt, lx_threaded_irq,
IRQF_SHARED, KBUILD_MODNAME, chip);
@@ -1055,6 +1059,9 @@ static int snd_lx6464es_create(struct snd_card *card,
free_irq(pci->irq, chip);
request_irq_failed:
+ iounmap(chip->port_dsp_bar);
+
+remap_pci_failed:
pci_release_regions(pci);
request_regions_failed:
--
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