All of lore.kernel.org
 help / color / mirror / Atom feed
From: Thomas Gleixner <tglx@linutronix.de>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
	Paul McKenney <paulmck@kernel.org>,
	Matthew Wilcox <willy@infradead.org>,
	Christian Benvenuti <benve@cisco.com>,
	Govindarajulu Varadarajan <_govind@gmx.com>,
	Dave Miller <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>,
	netdev@vger.kernel.org, Jonathan Corbet <corbet@lwn.net>,
	Mauro Carvalho Chehab <mchehab+huawei@kernel.org>,
	linux-doc@vger.kernel.org,
	Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
	Luc Van Oostenryck <luc.vanoostenryck@gmail.com>,
	Jay Cliburn <jcliburn@gmail.com>,
	Chris Snook <chris.snook@gmail.com>,
	Vishal Kulkarni <vishal@chelsio.com>,
	Jeff Kirsher <jeffrey.t.kirsher@intel.com>,
	intel-wired-lan@lists.osuosl.org,
	Shannon Nelson <snelson@pensando.io>,
	Pensando Drivers <drivers@pensando.io>,
	Andrew Lunn <andrew@lunn.ch>,
	Heiner Kallweit <hkallweit1@gmail.com>,
	Russell King <linux@armlinux.org.uk>,
	Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
	Solarflare linux maintainers <linux-net-drivers@solarflare.com>,
	Edward Cree <ecree@solarflare.com>,
	Martin Habets <mhabets@solarflare.com>,
	Jon Mason <jdmason@kudzu.us>, Daniel Drake <dsd@gentoo.org>,
	Ulrich Kunitz <kune@deine-taler.de>,
	Kalle Valo <kvalo@codeaurora.org>,
	linux-wireless@vger.kernel.org, linux-usb@vger.kernel.org,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Arend van Spriel <arend.vanspriel@broadcom.com>,
	Franky Lin <franky.lin@broadcom.com>,
	Hante Meuleman <hante.meuleman@broadcom.com>,
	Chi-Hsien Lin <chi-hsien.lin@cypress.com>,
	Wright Feng <wright.feng@cypress.com>,
	brcm80211-dev-list.pdl@broadcom.com,
	brcm80211-dev-list@cypress.com,
	Stanislav Yakovlev <stas.yakovlev@gmail.com>,
	Stanislaw Gruszka <stf_xl@wp.pl>,
	Johannes Berg <johannes.berg@intel.com>,
	Emmanuel Grumbach <emmanuel.grumbach@intel.com>,
	Luca Coelho <luciano.coelho@intel.com>,
	Intel Linux Wireless <linuxwifi@intel.com>,
	Jouni Malinen <j@w1.fi>, Amitkumar Karwar <amitkarwar@gmail.com>,
	Ganapathi Bhat <ganapathi.bhat@nxp.com>,
	Xinming Hu <huxinming820@gmail.com>,
	libertas-dev@lists.infradead.org,
	Pascal Terjan <pterjan@google.com>,
	Ping-Ke Shih <pkshih@realtek.com>
Subject: [patch V2 05/36] net: atheros: Remove WARN_ON(in_interrupt())
Date: Tue, 29 Sep 2020 22:25:14 +0200	[thread overview]
Message-ID: <20200929203459.967800092@linutronix.de> (raw)
In-Reply-To: 20200929202509.673358734@linutronix.de

From: Thomas Gleixner <tglx@linutronix.de>

in_interrupt() is ill defined and does not provide what the name
suggests. The usage especially in driver code is deprecated and a tree wide
effort to clean up and consolidate the (ab)usage of in_interrupt() and
related checks is happening.

In this case the check covers only parts of the contexts in which these
functions cannot be called. It fails to detect preemption or interrupt
disabled invocations.

As the functions which are invoked from at*_reinit_locked() contain a broad
variety of checks (always enabled or debug option dependent) which cover
all invalid conditions already, there is no point in having inconsistent
warnings in those drivers.

Just remove them.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>


---
 drivers/net/ethernet/atheros/atl1c/atl1c_main.c |    1 -
 drivers/net/ethernet/atheros/atl1e/atl1e_main.c |    2 --
 drivers/net/ethernet/atheros/atlx/atl2.c        |    1 -
 3 files changed, 4 deletions(-)

--- a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
+++ b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
@@ -220,7 +220,6 @@ static void atl1c_phy_config(struct time
 
 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
 {
-	WARN_ON(in_interrupt());
 	atl1c_down(adapter);
 	atl1c_up(adapter);
 	clear_bit(__AT_RESETTING, &adapter->flags);
--- a/drivers/net/ethernet/atheros/atl1e/atl1e_main.c
+++ b/drivers/net/ethernet/atheros/atl1e/atl1e_main.c
@@ -127,8 +127,6 @@ static void atl1e_phy_config(struct time
 
 void atl1e_reinit_locked(struct atl1e_adapter *adapter)
 {
-
-	WARN_ON(in_interrupt());
 	while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 		msleep(1);
 	atl1e_down(adapter);
--- a/drivers/net/ethernet/atheros/atlx/atl2.c
+++ b/drivers/net/ethernet/atheros/atlx/atl2.c
@@ -1086,7 +1086,6 @@ static int atl2_up(struct atl2_adapter *
 
 static void atl2_reinit_locked(struct atl2_adapter *adapter)
 {
-	WARN_ON(in_interrupt());
 	while (test_and_set_bit(__ATL2_RESETTING, &adapter->flags))
 		msleep(1);
 	atl2_down(adapter);


WARNING: multiple messages have this Message-ID (diff)
From: Thomas Gleixner <tglx@linutronix.de>
To: intel-wired-lan@osuosl.org
Subject: [Intel-wired-lan] [patch V2 05/36] net: atheros: Remove WARN_ON(in_interrupt())
Date: Tue, 29 Sep 2020 22:25:14 +0200	[thread overview]
Message-ID: <20200929203459.967800092@linutronix.de> (raw)
In-Reply-To: 20200929202509.673358734@linutronix.de

From: Thomas Gleixner <tglx@linutronix.de>

in_interrupt() is ill defined and does not provide what the name
suggests. The usage especially in driver code is deprecated and a tree wide
effort to clean up and consolidate the (ab)usage of in_interrupt() and
related checks is happening.

In this case the check covers only parts of the contexts in which these
functions cannot be called. It fails to detect preemption or interrupt
disabled invocations.

As the functions which are invoked from at*_reinit_locked() contain a broad
variety of checks (always enabled or debug option dependent) which cover
all invalid conditions already, there is no point in having inconsistent
warnings in those drivers.

Just remove them.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>


---
 drivers/net/ethernet/atheros/atl1c/atl1c_main.c |    1 -
 drivers/net/ethernet/atheros/atl1e/atl1e_main.c |    2 --
 drivers/net/ethernet/atheros/atlx/atl2.c        |    1 -
 3 files changed, 4 deletions(-)

--- a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
+++ b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
@@ -220,7 +220,6 @@ static void atl1c_phy_config(struct time
 
 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
 {
-	WARN_ON(in_interrupt());
 	atl1c_down(adapter);
 	atl1c_up(adapter);
 	clear_bit(__AT_RESETTING, &adapter->flags);
--- a/drivers/net/ethernet/atheros/atl1e/atl1e_main.c
+++ b/drivers/net/ethernet/atheros/atl1e/atl1e_main.c
@@ -127,8 +127,6 @@ static void atl1e_phy_config(struct time
 
 void atl1e_reinit_locked(struct atl1e_adapter *adapter)
 {
-
-	WARN_ON(in_interrupt());
 	while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 		msleep(1);
 	atl1e_down(adapter);
--- a/drivers/net/ethernet/atheros/atlx/atl2.c
+++ b/drivers/net/ethernet/atheros/atlx/atl2.c
@@ -1086,7 +1086,6 @@ static int atl2_up(struct atl2_adapter *
 
 static void atl2_reinit_locked(struct atl2_adapter *adapter)
 {
-	WARN_ON(in_interrupt());
 	while (test_and_set_bit(__ATL2_RESETTING, &adapter->flags))
 		msleep(1);
 	atl2_down(adapter);


  parent reply	other threads:[~2020-09-29 20:41 UTC|newest]

Thread overview: 88+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-29 20:25 [patch V2 00/36] net: in_interrupt() cleanup and fixes Thomas Gleixner
2020-09-29 20:25 ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 20:25 ` [patch V2 01/36] net: enic: Cure the enic api locking trainwreck Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 20:25 ` [patch V2 02/36] net: caif: Remove unused caif SPI driver Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 20:25 ` [patch V2 03/36] net: Add netif_rx_any_context() Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 20:25 ` [patch V2 04/36] net: caif: Use netif_rx_any_context() Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 20:25 ` Thomas Gleixner [this message]
2020-09-29 20:25   ` [Intel-wired-lan] [patch V2 05/36] net: atheros: Remove WARN_ON(in_interrupt()) Thomas Gleixner
2020-09-29 20:25 ` [patch V2 06/36] net: cxgb3: Cleanup in_interrupt() usage Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 20:25 ` [patch V2 07/36] net: cxbg4: Remove pointless in_interrupt() check Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 20:25 ` [patch V2 08/36] net: e100: Remove in_interrupt() usage and pointless GFP_ATOMIC allocation Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 20:25 ` [patch V2 09/36] net: fec_mpc52xx: Replace in_interrupt() usage Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 20:25 ` [patch V2 10/36] net: intel: Remove in_interrupt() warnings Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 20:25 ` [patch V2 11/36] net: ionic: Replace in_interrupt() usage Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 23:06   ` Shannon Nelson
2020-09-29 23:06     ` [Intel-wired-lan] " Shannon Nelson
2020-09-29 20:25 ` [patch V2 12/36] net: ionic: Remove WARN_ON(in_interrupt()) Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 20:25 ` [patch V2 13/36] net: mdiobus: Remove WARN_ON_ONCE(in_interrupt()) Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 20:25 ` [patch V2 14/36] net: natsemi: Replace in_interrupt() usage Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 20:25 ` [patch V2 15/36] net: sfc: " Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 20:25 ` [patch V2 16/36] net: sfc: Use GFP_KERNEL in efx_ef10_try_update_nic_stats() Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-30  8:00   ` Martin Habets
2020-09-30  8:00     ` [Intel-wired-lan] " Martin Habets
2020-09-29 20:25 ` [patch V2 17/36] net: sunbmac: Replace in_interrupt() usage Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 20:25 ` [patch V2 18/36] net: sun3lance: Remove redundant checks in interrupt handler Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 20:25 ` [patch V2 19/36] net: vxge: Remove in_interrupt() conditionals Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 20:25 ` [patch V2 20/36] net: zd1211rw: Remove ZD_ASSERT(in_interrupt()) Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 20:25 ` [patch V2 21/36] net: usb: kaweth: Replace kaweth_control() with usb_control_msg() Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-30  6:22   ` Greg Kroah-Hartman
2020-09-30  6:22     ` [Intel-wired-lan] " Greg Kroah-Hartman
2020-09-29 20:25 ` [patch V2 22/36] net: usb: kaweth: Remove last user of kaweth_control() Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 20:25 ` [patch V2 23/36] net: usb: net1080: Remove in_interrupt() comment Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 20:25 ` [patch V2 24/36] net: wan/lmc: Remove lmc_trace() Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 20:25 ` [patch V2 25/36] net: brcmfmac: Replace in_interrupt() Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 20:25 ` [patch V2 26/36] net: brcmfmac: Convey execution context via argument to brcmf_netif_rx() Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 22:03   ` Arend Van Spriel
2020-09-29 22:03     ` [Intel-wired-lan] " Arend Van Spriel
2020-09-29 20:25 ` [patch V2 27/36] net: brcmfmac: Convey allocation mode as argument Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 22:07   ` Arend Van Spriel
2020-09-29 22:07     ` [Intel-wired-lan] " Arend Van Spriel
2020-09-29 20:25 ` [patch V2 28/36] net: ipw2x00,iwlegacy,iwlwifi: Remove in_interrupt() from debug macros Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] [patch V2 28/36] net: ipw2x00, iwlegacy, iwlwifi: " Thomas Gleixner
2020-09-29 20:25 ` [patch V2 29/36] net: iwlwifi: Remove in_interrupt() from tracing macro Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 20:25 ` [patch V2 30/36] net: hostap: Remove in_interrupt() usage Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 20:25 ` [patch V2 31/36] net: mwifiex: Use netif_rx_any_context() Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 20:25 ` [patch V2 32/36] net: libertas libertas_tf: Remove in_interrupt() from debug macro Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 20:25 ` [patch V2 33/36] net: libertas: Use netif_rx_any_context() Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 21:53   ` James Cameron
2020-09-29 21:53     ` [Intel-wired-lan] " James Cameron
2020-09-29 20:25 ` [patch V2 34/36] net: rtlwifi: Remove void* casts related to delayed work Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 20:25 ` [patch V2 35/36] net: rtlwifi: Remove in_interrupt() from debug macro Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 20:25 ` [patch V2 36/36] net: rtlwifi: Replace in_interrupt() for context detection Thomas Gleixner
2020-09-29 20:25   ` [Intel-wired-lan] " Thomas Gleixner
2020-09-29 21:22 ` [patch V2 00/36] net: in_interrupt() cleanup and fixes David Miller
2020-09-29 21:22   ` [Intel-wired-lan] " David Miller

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200929203459.967800092@linutronix.de \
    --to=tglx@linutronix.de \
    --cc=_govind@gmx.com \
    --cc=amitkarwar@gmail.com \
    --cc=andrew@lunn.ch \
    --cc=arend.vanspriel@broadcom.com \
    --cc=benve@cisco.com \
    --cc=bigeasy@linutronix.de \
    --cc=brcm80211-dev-list.pdl@broadcom.com \
    --cc=brcm80211-dev-list@cypress.com \
    --cc=chi-hsien.lin@cypress.com \
    --cc=chris.snook@gmail.com \
    --cc=corbet@lwn.net \
    --cc=davem@davemloft.net \
    --cc=drivers@pensando.io \
    --cc=dsd@gentoo.org \
    --cc=ecree@solarflare.com \
    --cc=emmanuel.grumbach@intel.com \
    --cc=franky.lin@broadcom.com \
    --cc=ganapathi.bhat@nxp.com \
    --cc=gregkh@linuxfoundation.org \
    --cc=hante.meuleman@broadcom.com \
    --cc=hkallweit1@gmail.com \
    --cc=huxinming820@gmail.com \
    --cc=intel-wired-lan@lists.osuosl.org \
    --cc=j@w1.fi \
    --cc=jcliburn@gmail.com \
    --cc=jdmason@kudzu.us \
    --cc=jeffrey.t.kirsher@intel.com \
    --cc=johannes.berg@intel.com \
    --cc=kuba@kernel.org \
    --cc=kune@deine-taler.de \
    --cc=kvalo@codeaurora.org \
    --cc=libertas-dev@lists.infradead.org \
    --cc=linux-doc@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-net-drivers@solarflare.com \
    --cc=linux-usb@vger.kernel.org \
    --cc=linux-wireless@vger.kernel.org \
    --cc=linux@armlinux.org.uk \
    --cc=linuxwifi@intel.com \
    --cc=luc.vanoostenryck@gmail.com \
    --cc=luciano.coelho@intel.com \
    --cc=mchehab+huawei@kernel.org \
    --cc=mhabets@solarflare.com \
    --cc=netdev@vger.kernel.org \
    --cc=paulmck@kernel.org \
    --cc=peterz@infradead.org \
    --cc=pkshih@realtek.com \
    --cc=pterjan@google.com \
    --cc=snelson@pensando.io \
    --cc=stas.yakovlev@gmail.com \
    --cc=stf_xl@wp.pl \
    --cc=tsbogend@alpha.franken.de \
    --cc=vishal@chelsio.com \
    --cc=willy@infradead.org \
    --cc=wright.feng@cypress.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.