| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <20230710154932.68377-3-andriy.shevchenko@linux.intel.com>
Date: Mon, 10 Jul 2023 18:49:19 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Mark Brown <broonie@...nel.org>,
Cristian Ciocaltea <cristian.ciocaltea@...labora.com>,
Yang Yingliang <yangyingliang@...wei.com>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Amit Kumar Mahapatra via Alsa-devel
<alsa-devel@...a-project.org>,
Neil Armstrong <neil.armstrong@...aro.org>,
Tharun Kumar P <tharunkumar.pasumarthi@...rochip.com>,
Vijaya Krishna Nivarthi <quic_vnivarth@...cinc.com>,
Uwe Kleine-König
<u.kleine-koenig@...gutronix.de>, linux-spi@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-amlogic@...ts.infradead.org,
linux-mediatek@...ts.infradead.org, linux-arm-msm@...r.kernel.org,
linux-rockchip@...ts.infradead.org,
linux-riscv@...ts.infradead.org,
linux-stm32@...md-mailman.stormreply.com,
linux-trace-kernel@...r.kernel.org, netdev@...r.kernel.org
Cc: Sanjay R Mehta <sanju.mehta@....com>,
Radu Pirea <radu_nicolae.pirea@....ro>,
Nicolas Ferre <nicolas.ferre@...rochip.com>,
Alexandre Belloni <alexandre.belloni@...tlin.com>,
Claudiu Beznea <claudiu.beznea@...rochip.com>,
Tudor Ambarus <tudor.ambarus@...aro.org>,
Serge Semin <fancer.lancer@...il.com>,
Shawn Guo <shawnguo@...nel.org>,
Sascha Hauer <s.hauer@...gutronix.de>,
Pengutronix Kernel Team <kernel@...gutronix.de>,
Fabio Estevam <festevam@...il.com>,
NXP Linux Team <linux-imx@....com>,
Kevin Hilman <khilman@...libre.com>,
Jerome Brunet <jbrunet@...libre.com>,
Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
Matthias Brugger <matthias.bgg@...il.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>,
Andy Gross <agross@...nel.org>,
Bjorn Andersson <andersson@...nel.org>,
Konrad Dybcio <konrad.dybcio@...aro.org>,
Heiko Stuebner <heiko@...ech.de>,
Palmer Dabbelt <palmer@...belt.com>,
Paul Walmsley <paul.walmsley@...ive.com>,
Orson Zhai <orsonzhai@...il.com>,
Baolin Wang <baolin.wang@...ux.alibaba.com>,
Chunyan Zhang <zhang.lyra@...il.com>,
Alain Volmat <alain.volmat@...s.st.com>,
Maxime Coquelin <mcoquelin.stm32@...il.com>,
Alexandre Torgue <alexandre.torgue@...s.st.com>,
Max Filippov <jcmvbkbc@...il.com>,
Steven Rostedt <rostedt@...dmis.org>,
Masami Hiramatsu <mhiramat@...nel.org>,
Richard Cochran <richardcochran@...il.com>
Subject: [PATCH v2 02/15] spi: Drop duplicate IDR allocation code in spi_register_controller()
Refactor spi_register_controller() to drop duplicate IDR allocation.
Instead of if-else-if branching use two sequential if:s, which allows
to re-use the logic of IDR allocation in all cases.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
drivers/spi/spi.c | 50 ++++++++++++++++++++++-------------------------
1 file changed, 23 insertions(+), 27 deletions(-)
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 8f3282a71c63..6d74218cf38e 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -3081,6 +3081,20 @@ static int spi_controller_check_ops(struct spi_controller *ctlr)
return 0;
}
+/* Allocate dynamic bus number using Linux idr */
+static int spi_controller_id_alloc(struct spi_controller *ctlr, int start, int end)
+{
+ int id;
+
+ mutex_lock(&board_lock);
+ id = idr_alloc(&spi_master_idr, ctlr, start, end, GFP_KERNEL);
+ mutex_unlock(&board_lock);
+ if (WARN(id < 0, "couldn't get idr"))
+ return id == -ENOSPC ? -EBUSY : id;
+ ctlr->bus_num = id;
+ return 0;
+}
+
/**
* spi_register_controller - register SPI master or slave controller
* @ctlr: initialized master, originally from spi_alloc_master() or
@@ -3108,8 +3122,8 @@ int spi_register_controller(struct spi_controller *ctlr)
{
struct device *dev = ctlr->dev.parent;
struct boardinfo *bi;
+ int first_dynamic;
int status;
- int id, first_dynamic;
if (!dev)
return -ENODEV;
@@ -3122,27 +3136,13 @@ int spi_register_controller(struct spi_controller *ctlr)
if (status)
return status;
+ if (ctlr->bus_num < 0)
+ ctlr->bus_num = of_alias_get_id(ctlr->dev.of_node, "spi");
if (ctlr->bus_num >= 0) {
/* Devices with a fixed bus num must check-in with the num */
- mutex_lock(&board_lock);
- id = idr_alloc(&spi_master_idr, ctlr, ctlr->bus_num,
- ctlr->bus_num + 1, GFP_KERNEL);
- mutex_unlock(&board_lock);
- if (WARN(id < 0, "couldn't get idr"))
- return id == -ENOSPC ? -EBUSY : id;
- ctlr->bus_num = id;
- } else {
- /* Allocate dynamic bus number using Linux idr */
- id = of_alias_get_id(ctlr->dev.of_node, "spi");
- if (id >= 0) {
- ctlr->bus_num = id;
- mutex_lock(&board_lock);
- id = idr_alloc(&spi_master_idr, ctlr, ctlr->bus_num,
- ctlr->bus_num + 1, GFP_KERNEL);
- mutex_unlock(&board_lock);
- if (WARN(id < 0, "couldn't get idr"))
- return id == -ENOSPC ? -EBUSY : id;
- }
+ status = spi_controller_id_alloc(ctlr, ctlr->bus_num, ctlr->bus_num + 1);
+ if (status)
+ return status;
}
if (ctlr->bus_num < 0) {
first_dynamic = of_alias_get_highest_id("spi");
@@ -3151,13 +3151,9 @@ int spi_register_controller(struct spi_controller *ctlr)
else
first_dynamic++;
- mutex_lock(&board_lock);
- id = idr_alloc(&spi_master_idr, ctlr, first_dynamic,
- 0, GFP_KERNEL);
- mutex_unlock(&board_lock);
- if (WARN(id < 0, "couldn't get idr"))
- return id;
- ctlr->bus_num = id;
+ status = spi_controller_id_alloc(ctlr, first_dynamic, 0);
+ if (status)
+ return status;
}
ctlr->bus_lock_flag = 0;
init_completion(&ctlr->xfer_completion);
--
2.40.0.1.gaa8946217a0b
Powered by blists - more mailing lists