lkml.org 
[lkml]   [2022]   [Aug]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [Patch net] net: dsa: microchip: ksz9477: fix fdb_dump last invalid entry
On Fri, Aug 12, 2022 at 03:04:11PM +0530, Arun Ramadoss wrote:
> In the ksz9477_fdb_dump function it reads the ALU control register and
> exit from the timeout loop if there is valid entry or search is
> complete. After exiting the loop, it reads the alu entry and report to
> the user space irrespective of entry is valid. It works till the valid
> entry. If the loop exited when search is complete, it reads the alu
> table. The table returns all ones and it is reported to user space. So
> bridge fdb show gives ff:ff:ff:ff:ff:ff as last entry for every port.
> To fix it, after exiting the loop the entry is reported only if it is
> valid one.
>
> Fixes: c2e866911e25 ("net: dsa: microchip: break KSZ9477 DSA driver into two files")

I think this should be:
Fixes: b987e98e50ab ("dsa: add DSA switch driver for Microchip KSZ9477")
since that's when ksz9477_port_fdb_dump() was introduced, with identical
logic.

> Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
> ---
> drivers/net/dsa/microchip/ksz9477.c | 16 +++++++++-------
> 1 file changed, 9 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/net/dsa/microchip/ksz9477.c b/drivers/net/dsa/microchip/ksz9477.c
> index 4b14d80d27ed..aa961dc03ddf 100644
> --- a/drivers/net/dsa/microchip/ksz9477.c
> +++ b/drivers/net/dsa/microchip/ksz9477.c
> @@ -613,15 +613,17 @@ int ksz9477_fdb_dump(struct ksz_device *dev, int port,
> goto exit;
> }
>
> - /* read ALU table */
> - ksz9477_read_table(dev, alu_table);
> + if (ksz_data & ALU_VALID) {

I wonder if you could avoid increasing the indentation level using:

if (!(ksz_data & ALU_VALID))
continue;

> + /* read ALU table */
> + ksz9477_read_table(dev, alu_table);
>
> - ksz9477_convert_alu(&alu, alu_table);
> + ksz9477_convert_alu(&alu, alu_table);
>
> - if (alu.port_forward & BIT(port)) {
> - ret = cb(alu.mac, alu.fid, alu.is_static, data);
> - if (ret)
> - goto exit;
> + if (alu.port_forward & BIT(port)) {
> + ret = cb(alu.mac, alu.fid, alu.is_static, data);
> + if (ret)
> + goto exit;
> + }
> }
> } while (ksz_data & ALU_START);
>
>
> base-commit: f86d1fbbe7858884d6754534a0afbb74fc30bc26
> --
> 2.36.1
>

\
 
 \ /
  Last update: 2022-08-14 09:57    [W:0.052 / U:0.828 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site