From: Jakub Kicinski <kuba@kernel.org>
To: Eric Joyner <eric.joyner@amd.com>
Cc: <netdev@vger.kernel.org>, Brett Creeley <brett.creeley@amd.com>,
Andrew Lunn <andrew+netdev@lunn.ch>,
"David S. Miller" <davem@davemloft.net>,
"Eric Dumazet" <edumazet@google.com>,
Paolo Abeni <pabeni@redhat.com>
Subject: Re: [PATCH net-next 1/5] ionic: Small improvements in devcmd retry logic
Date: Fri, 1 May 2026 16:37:40 -0700 [thread overview]
Message-ID: <20260501163740.0f775e67@kernel.org> (raw)
In-Reply-To: <20260501031555.43259-2-eric.joyner@amd.com>
On Thu, 30 Apr 2026 20:15:51 -0700 Eric Joyner wrote:
> If the timeout time is hit when the last attempt returned EAGAIN, the
> driver returns -ETIMEDOUT. This causes the -EAGAIN result to be lost.
> Fix this by returning -EAGAIN if the timeout time is hit and the
> previous result matches.
>
> Also, reduce the sleep between the write to done and doorbell
> registers. The msleep(1000) was initially added in an arbitrary
> manner. However, this long of a sleep is problematic because
> it reduces the number of retries when -EAGAIN is returned, which
> may result in the devmcd giving up early due to the timeout. Fix
> this by reducing the sleep to msleep(50).
It would be useful to explain the significance of the return value
to the callers. Are you trying to return EAGAIN to user space?
Or some kernel-internal function catches this?
next prev parent reply other threads:[~2026-05-01 23:37 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-01 3:15 [PATCH net-next 0/5] Expose more port stats to ethtool Eric Joyner
2026-05-01 3:15 ` [PATCH net-next 1/5] ionic: Small improvements in devcmd retry logic Eric Joyner
2026-05-01 23:37 ` Jakub Kicinski [this message]
2026-05-05 15:54 ` Eric Joyner
2026-05-01 3:15 ` [PATCH net-next 2/5] ionic: Report "link_down_events_phy" in ethtool statistics Eric Joyner
2026-05-01 23:39 ` Jakub Kicinski
2026-05-01 3:15 ` [PATCH net-next 3/5] ionic: Update ionic_if.h with new extra port stats structure Eric Joyner
2026-05-01 23:40 ` Jakub Kicinski
2026-05-01 3:15 ` [PATCH net-next 4/5] ionic: Report rx_bits_phy stat to ethtool Eric Joyner
2026-05-01 3:15 ` [PATCH net-next 5/5] ionic: Add .get_fec_stats ethtool handler Eric Joyner
2026-05-01 23:41 ` Jakub Kicinski
2026-05-05 13:54 ` Vadim Fedorenko
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