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[RFC,03/17] crypto: caam: Blacklist CAAM when kexec is enabled

Message ID 1437250134-307-4-git-send-email-scottwood@freescale.com (mailing list archive)
State RFC
Delegated to: Scott Wood
Headers show

Commit Message

Scott Wood July 18, 2015, 8:08 p.m. UTC 
This driver hangs the kernel on boot when loaded via kexec.

To make this driver kexec-safe, add a suspend or freeze hook, and when
probing, don't make any assumptions about the existing hardware state
(e.g. don't request_irq before quiescing the device).

Signed-off-by: Scott Wood <scottwood@freescale.com>
Cc: Cristian Stoica <cristian.stoica@freescale.com>
Cc: Horia Geanta <horia.geanta@freescale.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: linux-crypto@vger.kernel.org
---
 drivers/crypto/caam/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/drivers/crypto/caam/Kconfig b/drivers/crypto/caam/Kconfig
index e286e28..310e9e0 100644
--- a/drivers/crypto/caam/Kconfig
+++ b/drivers/crypto/caam/Kconfig
@@ -1,6 +1,6 @@ 
 config CRYPTO_DEV_FSL_CAAM
 	tristate "Freescale CAAM-Multicore driver backend"
-	depends on FSL_SOC
+	depends on FSL_SOC && !KEXEC
 	help
 	  Enables the driver module for Freescale's Cryptographic Accelerator
 	  and Assurance Module (CAAM), also known as the SEC version 4 (SEC4).