linux-kernel - [PATCH v3 -next] i2c: designware: Remove code duplication

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Date:   Mon, 14 Mar 2022 10:03:23 +0100
From:   Jan Dabros <jsd@...ihalf.com>
To:     linux-kernel@...r.kernel.org, linux-i2c@...r.kernel.org,
        jarkko.nikula@...ux.intel.com, andriy.shevchenko@...ux.intel.com
Cc:     wsa@...nel.org, upstream@...ihalf.com, jsd@...ihalf.com
Subject: [PATCH v3 -next] i2c: designware: Remove code duplication

Simplify code by moving common part to one function.

Signed-off-by: Jan Dabros <jsd@...ihalf.com>
Suggested-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Acked-by: Jarkko Nikula <jarkko.nikula@...ux.intel.com>
---
v2->v3:
* Rebase on top of -next (v2 couldn't be applied cleanly)
v1->v2:
* Add kudos for Andy who suggested this change
* Get rid of extra function and move common code to psp_send_i2c_req
* Update commit message and commit title
  (was "i2c:designware: Add helper to remove redundancy")
 drivers/i2c/busses/i2c-designware-amdpsp.c | 35 ++++++++++------------
 1 file changed, 15 insertions(+), 20 deletions(-)

diff --git a/drivers/i2c/busses/i2c-designware-amdpsp.c b/drivers/i2c/busses/i2c-designware-amdpsp.c
index 3844695e6bf3..9b37f2b95abc 100644
--- a/drivers/i2c/busses/i2c-designware-amdpsp.c
+++ b/drivers/i2c/busses/i2c-designware-amdpsp.c
@@ -214,17 +214,28 @@ static int psp_send_i2c_req(enum psp_i2c_req_type i2c_req_type)
 				PSP_I2C_REQ_RETRY_DELAY_US,
 				PSP_I2C_REQ_RETRY_CNT * PSP_I2C_REQ_RETRY_DELAY_US,
 				0, req);
-	if (ret)
+	if (ret) {
+		dev_err(psp_i2c_dev, "Timed out waiting for PSP to %s I2C bus\n",
+			(i2c_req_type == PSP_I2C_REQ_ACQUIRE) ?
+			"release" : "acquire");
 		goto cleanup;
+	}
 
 	ret = status;
-	if (ret)
+	if (ret) {
+		dev_err(psp_i2c_dev, "PSP communication error\n");
 		goto cleanup;
+	}
 
 	dev_dbg(psp_i2c_dev, "Request accepted by PSP after %ums\n",
 		jiffies_to_msecs(jiffies - start));
 
 cleanup:
+	if (ret) {
+		dev_err(psp_i2c_dev, "Assume i2c bus is for exclusive host usage\n");
+		psp_i2c_mbox_fail = true;
+	}
+
 	kfree(req);
 	return ret;
 }
@@ -249,16 +260,8 @@ static int psp_acquire_i2c_bus(void)
 	}
 
 	status = psp_send_i2c_req(PSP_I2C_REQ_ACQUIRE);
-	if (status) {
-		if (status == -ETIMEDOUT)
-			dev_err(psp_i2c_dev, "Timed out waiting for PSP to release I2C bus\n");
-		else
-			dev_err(psp_i2c_dev, "PSP communication error\n");
-
-		dev_err(psp_i2c_dev, "Assume i2c bus is for exclusive host usage\n");
-		psp_i2c_mbox_fail = true;
+	if (status)
 		goto cleanup;
-	}
 
 	psp_i2c_sem_acquired = jiffies;
 	psp_i2c_access_count++;
@@ -294,16 +297,8 @@ static void psp_release_i2c_bus(void)
 
 	/* Send a release command to PSP */
 	status = psp_send_i2c_req(PSP_I2C_REQ_RELEASE);
-	if (status) {
-		if (status == -ETIMEDOUT)
-			dev_err(psp_i2c_dev, "Timed out waiting for PSP to acquire I2C bus\n");
-		else
-			dev_err(psp_i2c_dev, "PSP communication error\n");
-
-		dev_err(psp_i2c_dev, "Assume i2c bus is for exclusive host usage\n");
-		psp_i2c_mbox_fail = true;
+	if (status)
 		goto cleanup;
-	}
 
 	dev_dbg(psp_i2c_dev, "PSP semaphore held for %ums\n",
 		jiffies_to_msecs(jiffies - psp_i2c_sem_acquired));
-- 
2.35.1.723.g4982287a31-goog