linux-kernel - [PATCHv2] drivers: optee: fix i2c build issue

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Message-Id: <20200831161102.14735-1-jorge@foundries.io>
Date:   Mon, 31 Aug 2020 18:11:02 +0200
From:   Jorge Ramirez-Ortiz <jorge@...ndries.io>
To:     jorge@...ndries.io, jens.wiklander@...aro.org,
        rdunlap@...radead.org
Cc:     sumit.garg@...aro.org, tee-dev@...ts.linaro.org,
        linux-kernel@...r.kernel.org, ricardo@...ndries.io
Subject: [PATCHv2] drivers: optee: fix i2c build issue

When the optee driver is compiled into the kernel while the i2c core
is configured as a module, the i2c symbols are not available.

This commit addresses the situation by disabling the i2c support for
this use case while allowing it in all other scenarios:

 i2c=y, optee=y
 i2c=m, optee=m
 i2c=y, optee=m
 i2c=m, optee=y (not supported)

Reported-by: kernel test robot <lkp@...el.com>
Signed-off-by: Jorge Ramirez-Ortiz <jorge@...ndries.io>
---
  v2: uses IS_REACHABLE instead of macro combination

  This patch applies on top of
  https://git.linaro.org/people/jens.wiklander/linux-tee.git/tag/?h=optee-i2c-for-v5.10 

 drivers/tee/optee/rpc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/tee/optee/rpc.c b/drivers/tee/optee/rpc.c
index 64a206c56264..1e3614e4798f 100644
--- a/drivers/tee/optee/rpc.c
+++ b/drivers/tee/optee/rpc.c
@@ -50,7 +50,7 @@ static void handle_rpc_func_cmd_get_time(struct optee_msg_arg *arg)
 	arg->ret = TEEC_ERROR_BAD_PARAMETERS;
 }
 
-#if IS_ENABLED(CONFIG_I2C)
+#if IS_REACHABLE(CONFIG_I2C)
 static void handle_rpc_func_cmd_i2c_transfer(struct tee_context *ctx,
 					     struct optee_msg_arg *arg)
 {
-- 
2.17.1