linux-kernel - [PATCH net-next 4/9] net: ipa: tighten up IPA register validity checking

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Date:   Wed,  8 Feb 2023 14:56:48 -0600
From:   Alex Elder <elder@...aro.org>
To:     davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com
Cc:     caleb.connolly@...aro.org, 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 4/9] net: ipa: tighten up IPA register validity checking

When checking the validity of an IPA register ID, compare it against
all possible ipa_reg_id values.

Rename the function ipa_reg_id_valid() to be specific about what's
being checked.

Signed-off-by: Alex Elder <elder@...aro.org>
---
 drivers/net/ipa/ipa_reg.c | 49 +++++++++++++++++++++++++++++++++++----
 1 file changed, 45 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ipa/ipa_reg.c b/drivers/net/ipa/ipa_reg.c
index d3d05420c5e91..65d747200be3c 100644
--- a/drivers/net/ipa/ipa_reg.c
+++ b/drivers/net/ipa/ipa_reg.c
@@ -9,8 +9,8 @@
 #include "ipa.h"
 #include "ipa_reg.h"
 
-/* Is this register valid and defined for the current IPA version? */
-static bool ipa_reg_valid(struct ipa *ipa, enum ipa_reg_id reg_id)
+/* Is this register ID valid for the current IPA version? */
+static bool ipa_reg_id_valid(struct ipa *ipa, enum ipa_reg_id reg_id)
 {
 	enum ipa_version version = ipa->version;
 	bool valid;
@@ -57,8 +57,49 @@ static bool ipa_reg_valid(struct ipa *ipa, enum ipa_reg_id reg_id)
 		valid = version >= IPA_VERSION_3_1;
 		break;
 
+	case COMP_CFG:
+	case CLKON_CFG:
+	case ROUTE:
+	case SHARED_MEM_SIZE:
+	case QSB_MAX_WRITES:
+	case QSB_MAX_READS:
+	case FILT_ROUT_HASH_EN:
+	case FILT_ROUT_CACHE_CFG:
+	case FILT_ROUT_HASH_FLUSH:
+	case FILT_ROUT_CACHE_FLUSH:
+	case STATE_AGGR_ACTIVE:
+	case LOCAL_PKT_PROC_CNTXT:
+	case AGGR_FORCE_CLOSE:
+	case SRC_RSRC_GRP_01_RSRC_TYPE:
+	case SRC_RSRC_GRP_23_RSRC_TYPE:
+	case DST_RSRC_GRP_01_RSRC_TYPE:
+	case DST_RSRC_GRP_23_RSRC_TYPE:
+	case ENDP_INIT_CTRL:
+	case ENDP_INIT_CFG:
+	case ENDP_INIT_NAT:
+	case ENDP_INIT_HDR:
+	case ENDP_INIT_HDR_EXT:
+	case ENDP_INIT_HDR_METADATA_MASK:
+	case ENDP_INIT_MODE:
+	case ENDP_INIT_AGGR:
+	case ENDP_INIT_HOL_BLOCK_EN:
+	case ENDP_INIT_HOL_BLOCK_TIMER:
+	case ENDP_INIT_DEAGGR:
+	case ENDP_INIT_RSRC_GRP:
+	case ENDP_INIT_SEQ:
+	case ENDP_STATUS:
+	case ENDP_FILTER_CACHE_CFG:
+	case ENDP_ROUTER_CACHE_CFG:
+	case IPA_IRQ_STTS:
+	case IPA_IRQ_EN:
+	case IPA_IRQ_CLR:
+	case IPA_IRQ_UC:
+	case IRQ_SUSPEND_INFO:
+		valid = true;	/* These should be defined for all versions */
+		break;
+
 	default:
-		valid = true;	/* Others should be defined for all versions */
+		valid = false;
 		break;
 	}
 
@@ -69,7 +110,7 @@ static bool ipa_reg_valid(struct ipa *ipa, enum ipa_reg_id reg_id)
 
 const struct ipa_reg *ipa_reg(struct ipa *ipa, enum ipa_reg_id reg_id)
 {
-	if (WARN_ON(!ipa_reg_valid(ipa, reg_id)))
+	if (WARN_ON(!ipa_reg_id_valid(ipa, reg_id)))
 		return NULL;
 
 	return ipa->regs->reg[reg_id];
-- 
2.34.1