[PATCH] powerpc/powernv/flash: Check OPAL flash calls exist before using

[Vasant Hegde]

Currently only FSP based powernv systems supports firmware update
interfaces. Hence check that the token OPAL_FLASH_VALIDATE exists
before initalising the flash driver.

Signed-off-by: Vasant Hegde <hegdevas...@linux.vnet.ibm.com>
---
 arch/powerpc/platforms/powernv/opal-flash.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/powerpc/platforms/powernv/opal-flash.c 
b/arch/powerpc/platforms/powernv/opal-flash.c
index 7e7d38b17420..05490fc22fae 100644
--- a/arch/powerpc/platforms/powernv/opal-flash.c
+++ b/arch/powerpc/platforms/powernv/opal-flash.c
@@ -520,6 +520,10 @@ void __init opal_flash_update_init(void)
 {
        int ret;
 
+       /* Firmware update is not supported by firmware */
+       if (!opal_check_token(OPAL_FLASH_VALIDATE))
+               return;
+
        /* Allocate validate image buffer */
        validate_flash_data.buf = kzalloc(VALIDATE_BUF_SIZE, GFP_KERNEL);
        if (!validate_flash_data.buf) {
-- 
2.31.1