linux-kernel - [PATCH net-next 3/6] net: ipa: move and redefine ipa_version

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Date:   Fri,  9 Sep 2022 20:11:28 -0500
From:   Alex Elder <elder@...aro.org>
To:     davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com
Cc:     mka@...omium.org, evgreen@...omium.org, andersson@...nel.org,
        quic_cpratapa@...cinc.com, quic_avuyyuru@...cinc.com,
        quic_jponduru@...cinc.com, quic_subashab@...cinc.com,
        elder@...nel.org, netdev@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH net-next 3/6] net: ipa: move and redefine ipa_version_valid()

Move the definition of ipa_version_valid(), making it a static
inline function defined together with the enumerated type in
"ipa_version.h".  Define a new count value in the type.

Rename the function to be ipa_version_supported(), and have it
return true only if the IPA version supplied is explicitly supported
by the driver.

Signed-off-by: Alex Elder <elder@...aro.org>
---
 drivers/net/ipa/ipa_main.c    | 25 ++-----------------------
 drivers/net/ipa/ipa_version.h | 20 ++++++++++++++++++--
 2 files changed, 20 insertions(+), 25 deletions(-)

diff --git a/drivers/net/ipa/ipa_main.c b/drivers/net/ipa/ipa_main.c
index 32962d885acd5..9dfa7f58a207f 100644
--- a/drivers/net/ipa/ipa_main.c
+++ b/drivers/net/ipa/ipa_main.c
@@ -616,27 +616,6 @@ static void ipa_validate_build(void)
 			field_max(AGGR_GRANULARITY_FMASK));
 }
 
-static bool ipa_version_valid(enum ipa_version version)
-{
-	switch (version) {
-	case IPA_VERSION_3_0:
-	case IPA_VERSION_3_1:
-	case IPA_VERSION_3_5:
-	case IPA_VERSION_3_5_1:
-	case IPA_VERSION_4_0:
-	case IPA_VERSION_4_1:
-	case IPA_VERSION_4_2:
-	case IPA_VERSION_4_5:
-	case IPA_VERSION_4_7:
-	case IPA_VERSION_4_9:
-	case IPA_VERSION_4_11:
-		return true;
-
-	default:
-		return false;
-	}
-}
-
 /**
  * ipa_probe() - IPA platform driver probe function
  * @pdev:	Platform device pointer
@@ -678,8 +657,8 @@ static int ipa_probe(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
-	if (!ipa_version_valid(data->version)) {
-		dev_err(dev, "invalid IPA version\n");
+	if (!ipa_version_supported(data->version)) {
+		dev_err(dev, "unsupported IPA version %u\n", data->version);
 		return -EINVAL;
 	}
 
diff --git a/drivers/net/ipa/ipa_version.h b/drivers/net/ipa/ipa_version.h
index 852d6cbc87758..58f7b43b4db3b 100644
--- a/drivers/net/ipa/ipa_version.h
+++ b/drivers/net/ipa/ipa_version.h
@@ -19,10 +19,10 @@
  * @IPA_VERSION_4_7:	IPA version 4.7/GSI version 2.7
  * @IPA_VERSION_4_9:	IPA version 4.9/GSI version 2.9
  * @IPA_VERSION_4_11:	IPA version 4.11/GSI version 2.11 (2.1.1)
+ * @IPA_VERSION_COUNT:	Number of defined IPA versions
  *
  * Defines the version of IPA (and GSI) hardware present on the platform.
- * Please update ipa_version_valid() and ipa_version_string() whenever a
- * new version is added.
+ * Please update ipa_version_string() whenever a new version is added.
  */
 enum ipa_version {
 	IPA_VERSION_3_0,
@@ -36,8 +36,24 @@ enum ipa_version {
 	IPA_VERSION_4_7,
 	IPA_VERSION_4_9,
 	IPA_VERSION_4_11,
+	IPA_VERSION_COUNT,			/* Last; not a version */
 };
 
+static inline bool ipa_version_supported(enum ipa_version version)
+{
+	switch (version) {
+	case IPA_VERSION_3_1:
+	case IPA_VERSION_3_5_1:
+	case IPA_VERSION_4_2:
+	case IPA_VERSION_4_5:
+	case IPA_VERSION_4_9:
+	case IPA_VERSION_4_11:
+		return true;
+	default:
+		return false;
+	}
+}
+
 /* Execution environment IDs */
 enum gsi_ee_id {
 	GSI_EE_AP		= 0x0,
-- 
2.34.1