netdev - [net-next 08/16] ice: fix numeric overflow warning

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Message-Id: <20190225184306.13505-9-jeffrey.t.kirsher@intel.com>
Date:   Mon, 25 Feb 2019 10:42:58 -0800
From:   Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To:     davem@...emloft.net
Cc:     Bruce Allan <bruce.w.allan@...el.com>, netdev@...r.kernel.org,
        nhorman@...hat.com, sassmann@...hat.com,
        Anirudh Venkataramanan <anirudh.venkataramanan@...el.com>,
        Andrew Bowers <andrewx.bowers@...el.com>,
        Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next 08/16] ice: fix numeric overflow warning

From: Bruce Allan <bruce.w.allan@...el.com>

When compiling and analyzing the driver on newer kernels, a static
analyzer warns about the following "numeric overflow" issues:

  "The result of expression: 'budget-1' generates 4-byte type while casting
   to a bigger size of 8-byte".

  "The result of expression: '*words-words_read' generates 4-byte type
   while casting to a bigger size of 8-byte".

Fix them both.

Signed-off-by: Bruce Allan <bruce.w.allan@...el.com>
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@...el.com>
Tested-by: Andrew Bowers <andrewx.bowers@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
 drivers/net/ethernet/intel/ice/ice_nvm.c  | 7 ++++---
 drivers/net/ethernet/intel/ice/ice_txrx.c | 2 +-
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_nvm.c b/drivers/net/ethernet/intel/ice/ice_nvm.c
index ce64cecdae9c..413fdbbcc4d0 100644
--- a/drivers/net/ethernet/intel/ice/ice_nvm.c
+++ b/drivers/net/ethernet/intel/ice/ice_nvm.c
@@ -152,9 +152,10 @@ ice_read_sr_buf_aq(struct ice_hw *hw, u16 offset, u16 *words, u16 *data)
 		 */
 		off_w = offset % ICE_SR_SECTOR_SIZE_IN_WORDS;
 		read_size = off_w ?
-			min(*words,
-			    (u16)(ICE_SR_SECTOR_SIZE_IN_WORDS - off_w)) :
-			min((*words - words_read), ICE_SR_SECTOR_SIZE_IN_WORDS);
+			min_t(u16, *words,
+			      (ICE_SR_SECTOR_SIZE_IN_WORDS - off_w)) :
+			min_t(u16, (*words - words_read),
+			      ICE_SR_SECTOR_SIZE_IN_WORDS);
 
 		/* Check if this is last command, if so set proper flag */
 		if ((words_read + read_size) >= *words)
diff --git a/drivers/net/ethernet/intel/ice/ice_txrx.c b/drivers/net/ethernet/intel/ice/ice_txrx.c
index 67d129bfe489..c289d97f477d 100644
--- a/drivers/net/ethernet/intel/ice/ice_txrx.c
+++ b/drivers/net/ethernet/intel/ice/ice_txrx.c
@@ -1169,7 +1169,7 @@ int ice_napi_poll(struct napi_struct *napi, int budget)
 		if (test_bit(ICE_FLAG_MSIX_ENA, pf->flags))
 			ice_update_ena_itr(vsi, q_vector);
 
-	return min(work_done, budget - 1);
+	return min_t(int, work_done, budget - 1);
 }
 
 /* helper function for building cmd/type/offset */
-- 
2.20.1