[PATCH 1/2] crypto: inside-secure - fix uninitialized-variable warning

[Arnd Bergmann]

The addition of PCI support introduced multiple randconfig issues.

- When PCI is disabled, some external functions are undeclared:
drivers/crypto/inside-secure/safexcel.c:944:9: error: implicit declaration of 
function 'pci_irq_vector' [-Werror,-Wimplicit-function-declaration]

- Also, in the same configuration, there is an uninitialized variable:
drivers/crypto/inside-secure/safexcel.c:940:6: error: variable 'irq' is used 
uninitialized whenever 'if' condition is false 
[-Werror,-Wsometimes-uninitialized]

- Finally, the driver fails to completely if both PCI and OF
  are disabled.

Take care of all of the above by adding more checks for CONFIG_PCI
and CONFIG_OF.

Fixes: 625f269a5a7a ("crypto: inside-secure - add support for PCI based FPGA 
development board")
Signed-off-by: Arnd Bergmann <a...@arndb.de>
---
 drivers/crypto/Kconfig                  | 2 +-
 drivers/crypto/inside-secure/safexcel.c | 8 ++++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig
index 3c4361947f8d..048bc4b393ac 100644
--- a/drivers/crypto/Kconfig
+++ b/drivers/crypto/Kconfig
@@ -719,7 +719,7 @@ source "drivers/crypto/stm32/Kconfig"
 
 config CRYPTO_DEV_SAFEXCEL
        tristate "Inside Secure's SafeXcel cryptographic engine driver"
-       depends on OF || PCI || COMPILE_TEST
+       depends on OF || PCI
        select CRYPTO_LIB_AES
        select CRYPTO_AUTHENC
        select CRYPTO_BLKCIPHER
diff --git a/drivers/crypto/inside-secure/safexcel.c 
b/drivers/crypto/inside-secure/safexcel.c
index e12a2a3a5422..9c0bce77de14 100644
--- a/drivers/crypto/inside-secure/safexcel.c
+++ b/drivers/crypto/inside-secure/safexcel.c
@@ -938,6 +938,7 @@ static int safexcel_request_ring_irq(void *pdev, int irqid,
        struct device *dev;
 
        if (IS_ENABLED(CONFIG_PCI) && is_pci_dev) {
+#ifdef CONFIG_PCI
                struct pci_dev *pci_pdev = pdev;
 
                dev = &pci_pdev->dev;
@@ -947,6 +948,7 @@ static int safexcel_request_ring_irq(void *pdev, int irqid,
                                irqid, irq);
                        return irq;
                }
+#endif
        } else if (IS_ENABLED(CONFIG_OF)) {
                struct platform_device *plf_pdev = pdev;
                char irq_name[6] = {0}; /* "ringX\0" */
@@ -960,6 +962,8 @@ static int safexcel_request_ring_irq(void *pdev, int irqid,
                                irq_name, irq);
                        return irq;
                }
+       } else {
+               return -ENXIO;
        }
 
        ret = devm_request_threaded_irq(dev, irq, handler,
@@ -1138,6 +1142,7 @@ static int safexcel_probe_generic(void *pdev,
        safexcel_configure(priv);
 
        if (IS_ENABLED(CONFIG_PCI) && priv->version == EIP197_DEVBRD) {
+#ifdef CONFIG_PCI
                /*
                 * Request MSI vectors for global + 1 per ring -
                 * or just 1 for older dev images
@@ -1152,6 +1157,7 @@ static int safexcel_probe_generic(void *pdev,
                        dev_err(dev, "Failed to allocate PCI MSI interrupts\n");
                        return ret;
                }
+#endif
        }
 
        /* Register the ring IRQ handlers and configure the rings */
@@ -1503,7 +1509,9 @@ static struct pci_driver safexcel_pci_driver = {
 
 static int __init safexcel_init(void)
 {
+#ifdef CONFIG_PCI
        int rc;
+#endif
 
 #if IS_ENABLED(CONFIG_OF)
                /* Register platform driver */
-- 
2.20.0