netdev - [PATCH net-next] net: ipa: avoid a bogus warning

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Date:   Sat, 31 Oct 2020 10:15:24 -0500
From:   Alex Elder <elder@...aro.org>
To:     davem@...emloft.net, kuba@...nel.org
Cc:     evgreen@...omium.org, subashab@...eaurora.org,
        cpratapa@...eaurora.org, bjorn.andersson@...aro.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH net-next] net: ipa: avoid a bogus warning

The previous commit added support for IPA having up to six source
and destination resources.  But currently nothing uses more than
four.  (Five of each are used in a newer version of the hardware.)

I find that in one of my build environments the compiler complains
about newly-added code in two spots.  Inspection shows that the
warnings have no merit, but this compiler does not recognize that.

    ipa_main.c:457:39: warning: array index 5 is past the end of the
        array (which contains 4 elements) [-Warray-bounds]
    (and the same warning at line 483)

We can make this warning go away by changing the number of elements
in the source and destination resource limit arrays--now rather than
waiting until we need it to support the newer hardware.  This change
was coming soon anyway; make it now to get rid of the warning.

Signed-off-by: Alex Elder <elder@...aro.org>
---
Sorry about this; I got no warnings on my primary build system.

 drivers/net/ipa/ipa_data.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ipa/ipa_data.h b/drivers/net/ipa/ipa_data.h
index 0225d81d85028..83c4b78373efb 100644
--- a/drivers/net/ipa/ipa_data.h
+++ b/drivers/net/ipa/ipa_data.h
@@ -46,8 +46,8 @@
  */

 /* The maximum value returned by ipa_resource_group_{src,dst}_count() */
-#define IPA_RESOURCE_GROUP_SRC_MAX	4
-#define IPA_RESOURCE_GROUP_DST_MAX	4
+#define IPA_RESOURCE_GROUP_SRC_MAX	5
+#define IPA_RESOURCE_GROUP_DST_MAX	5

 /**
  * struct gsi_channel_data - GSI channel configuration data
-- 
2.20.1