diff mbox series

qed (gcc13): use u16 for fid to be big enough

Message ID 20221031114354.10398-1-jirislaby@kernel.org
State New
Headers
Series qed (gcc13): use u16 for fid to be big enough |

Commit Message

Jiri Slaby Oct. 31, 2022, 11:43 a.m. UTC 
  gcc 13 correctly reports overflow in qed_grc_dump_addr_range():
In file included from drivers/net/ethernet/qlogic/qed/qed.h:23,
                 from drivers/net/ethernet/qlogic/qed/qed_debug.c:10:
drivers/net/ethernet/qlogic/qed/qed_debug.c: In function 'qed_grc_dump_addr_range':
include/linux/qed/qed_if.h:1217:9: error: overflow in conversion from 'int' to 'u8' {aka 'unsigned char'} changes value from '(int)vf_id << 8 | 128' to '128' [-Werror=overflow]

We do:
  u8 fid;
  ...
  fid = vf_id << 8 | 128;

Since fid is 16bit (and the stored value above too), fid should be u16,
not u8. Fix that.

Cc: Martin Liska <mliska@suse.cz>
Cc: Ariel Elior <aelior@marvell.com>
Cc: Manish Chopra <manishc@marvell.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: netdev@vger.kernel.org
Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
---
 drivers/net/ethernet/qlogic/qed/qed_debug.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Comments

patchwork-bot+netdevbpf@kernel.org Nov. 3, 2022, 3:50 a.m. UTC | #1 
Hello:

This patch was applied to netdev/net-next.git (master)
by Jakub Kicinski <kuba@kernel.org>:

On Mon, 31 Oct 2022 12:43:54 +0100 you wrote:
> gcc 13 correctly reports overflow in qed_grc_dump_addr_range():
> In file included from drivers/net/ethernet/qlogic/qed/qed.h:23,
>                  from drivers/net/ethernet/qlogic/qed/qed_debug.c:10:
> drivers/net/ethernet/qlogic/qed/qed_debug.c: In function 'qed_grc_dump_addr_range':
> include/linux/qed/qed_if.h:1217:9: error: overflow in conversion from 'int' to 'u8' {aka 'unsigned char'} changes value from '(int)vf_id << 8 | 128' to '128' [-Werror=overflow]
> 
> We do:
>   u8 fid;
>   ...
>   fid = vf_id << 8 | 128;
> 
> [...]

Here is the summary with links:
  - qed (gcc13): use u16 for fid to be big enough
    https://git.kernel.org/netdev/net-next/c/7d84118229bf

You are awesome, thank you!
diff mbox series

Patch

diff --git a/drivers/net/ethernet/qlogic/qed/qed_debug.c b/drivers/net/ethernet/qlogic/qed/qed_debug.c
index 5250d1d1e49c..86ecb080b153 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_debug.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_debug.c
@@ -1972,9 +1972,10 @@  static u32 qed_grc_dump_addr_range(struct qed_hwfn *p_hwfn,
 				   u8 split_id)
 {
 	struct dbg_tools_data *dev_data = &p_hwfn->dbg_info;
-	u8 port_id = 0, pf_id = 0, vf_id = 0, fid = 0;
+	u8 port_id = 0, pf_id = 0, vf_id = 0;
 	bool read_using_dmae = false;
 	u32 thresh;
+	u16 fid;
 
 	if (!dump)
 		return len;