[PATCH -next] PCI: brcmstb: Fix missing mutex_init()

[Wei Yongjun <weiyongjun1@xxxxxxxxxx>]

The driver allocates the mutex but not initialize it.
Use mutex_init() on it to initialize it correctly.

This is detected by Coccinelle semantic patch.

Fixes: 72af6f6f0d13 ("PCI: brcmstb: Add MSI support")
Signed-off-by: Wei Yongjun <weiyongjun1@xxxxxxxxxx>
---
 drivers/pci/controller/pcie-brcmstb.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c
index 43cba76c0e1e..065bada9cfad 100644
--- a/drivers/pci/controller/pcie-brcmstb.c
+++ b/drivers/pci/controller/pcie-brcmstb.c
@@ -528,6 +528,7 @@ static int brcm_pcie_enable_msi(struct brcm_pcie *pcie)
 	if (!msi)
 		return -ENOMEM;
 
+	mutex_init(&msi->lock);
 	msi->dev = dev;
 	msi->base = pcie->base;
 	msi->np = pcie->np;