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powerpc/powernv/flash: Check OPAL flash calls exist before using

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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 <hegdevasant@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210914101630.30613-1-hegdevasant@linux.vnet.ibm.com
This commit is contained in:
Vasant Hegde 2021-09-14 15:46:30 +05:30 committed by Michael Ellerman
parent bb12dd42d2
commit 25e69962ef
1 changed files with 4 additions and 0 deletions
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4
arch/powerpc/platforms/powernv/opal-flash.c
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@ -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) {