mmc: cmdq_hci: Fix NULL pointer dereference crash
Add a check on cmdq_host->ops to avoid NULL pointer
dereference, if sdhci_dumpregs is called before
initializing cmdq_host->ops structure.
Change-Id: Idd1794e162c7a53cc63504e15e6e490481f104a3
Signed-off-by: Ritesh Harjani <riteshh@codeaurora.org>
diff --git a/drivers/mmc/host/cmdq_hci.h b/drivers/mmc/host/cmdq_hci.h
index ce6048b..0bf05fa 100644
--- a/drivers/mmc/host/cmdq_hci.h
+++ b/drivers/mmc/host/cmdq_hci.h
@@ -212,7 +212,7 @@
static inline void cmdq_writel(struct cmdq_host *host, u32 val, int reg)
{
- if (unlikely(host->ops->write_l))
+ if (unlikely(host->ops && host->ops->write_l))
host->ops->write_l(host, val, reg);
else
writel_relaxed(val, host->mmio + reg);
@@ -220,7 +220,7 @@
static inline u32 cmdq_readl(struct cmdq_host *host, int reg)
{
- if (unlikely(host->ops->read_l))
+ if (unlikely(host->ops && host->ops->read_l))
return host->ops->read_l(host, reg);
else
return readl_relaxed(host->mmio + reg);