| 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
| ||
|
Date: Sat, 19 May 2012 23:45:37 -0600
From: Grant Likely <grant.likely@...retlab.ca>
To: spi-devel-general@...ts.sourceforge.com,
linux-kernel@...r.kernel.org
Cc: Grant Likely <grant.likely@...retlab.ca>
Subject: [PATCH] spi: By default setup spi_masters with 1 chipselect and dynamics bus number
Trivial simplification. Instead of requiring spi master drivers to
always set the bus number (even when a dynamic number is desired),
this patch modifies spi_alloc_master() to initialize num_chipselect to
1 (because there will always be at least one CS) and bus_num to -1 for
dynamic allocation. This simplifies the code needed to be written for
drivers.
Signed-off-by: Grant Likely <grant.likely@...retlab.ca>
---
drivers/spi/spi-ath79.c | 3 ---
drivers/spi/spi-lm70llp.c | 3 ---
drivers/spi/spi-mpc52xx.c | 3 ---
drivers/spi/spi-ppc4xx.c | 3 ---
drivers/spi/spi-topcliff-pch.c | 1 -
drivers/spi/spi.c | 2 ++
6 files changed, 2 insertions(+), 13 deletions(-)
diff --git a/drivers/spi/spi-ath79.c b/drivers/spi/spi-ath79.c
index acc88b4..249077e 100644
--- a/drivers/spi/spi-ath79.c
+++ b/drivers/spi/spi-ath79.c
@@ -216,9 +216,6 @@ static __devinit int ath79_spi_probe(struct platform_device *pdev)
if (pdata) {
master->bus_num = pdata->bus_num;
master->num_chipselect = pdata->num_chipselect;
- } else {
- master->bus_num = -1;
- master->num_chipselect = 1;
}
sp->bitbang.master = spi_master_get(master);
diff --git a/drivers/spi/spi-lm70llp.c b/drivers/spi/spi-lm70llp.c
index 933eb9d..0759b5d 100644
--- a/drivers/spi/spi-lm70llp.c
+++ b/drivers/spi/spi-lm70llp.c
@@ -219,9 +219,6 @@ static void spi_lm70llp_attach(struct parport *p)
}
pp = spi_master_get_devdata(master);
- master->bus_num = -1; /* dynamic alloc of a bus number */
- master->num_chipselect = 1;
-
/*
* SPI and bitbang hookup.
*/
diff --git a/drivers/spi/spi-mpc52xx.c b/drivers/spi/spi-mpc52xx.c
index 57633d9..cb3a383 100644
--- a/drivers/spi/spi-mpc52xx.c
+++ b/drivers/spi/spi-mpc52xx.c
@@ -433,7 +433,6 @@ static int __devinit mpc52xx_spi_probe(struct platform_device *op)
goto err_alloc;
}
- master->bus_num = -1;
master->setup = mpc52xx_spi_setup;
master->transfer = mpc52xx_spi_transfer;
master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST;
@@ -479,8 +478,6 @@ static int __devinit mpc52xx_spi_probe(struct platform_device *op)
gpio_direction_output(gpio_cs, 1);
ms->gpio_cs[i] = gpio_cs;
}
- } else {
- master->num_chipselect = 1;
}
spin_lock_init(&ms->lock);
diff --git a/drivers/spi/spi-ppc4xx.c b/drivers/spi/spi-ppc4xx.c
index d95d307..75ac9d4 100644
--- a/drivers/spi/spi-ppc4xx.c
+++ b/drivers/spi/spi-ppc4xx.c
@@ -466,9 +466,6 @@ static int __init spi_ppc4xx_of_probe(struct platform_device *op)
bbp->master->setup = spi_ppc4xx_setup;
bbp->master->cleanup = spi_ppc4xx_cleanup;
- /* Allocate bus num dynamically. */
- bbp->master->bus_num = -1;
-
/* the spi->mode bits understood by this driver: */
bbp->master->mode_bits =
SPI_CPHA | SPI_CPOL | SPI_CS_HIGH | SPI_LSB_FIRST;
diff --git a/drivers/spi/spi-topcliff-pch.c b/drivers/spi/spi-topcliff-pch.c
index 77c4562..cd56dcf 100644
--- a/drivers/spi/spi-topcliff-pch.c
+++ b/drivers/spi/spi-topcliff-pch.c
@@ -1438,7 +1438,6 @@ static int __devinit pch_spi_pd_probe(struct platform_device *plat_dev)
plat_dev->id, data->io_remap_addr);
/* initialize members of SPI master */
- master->bus_num = -1;
master->num_chipselect = PCH_MAX_CS;
master->setup = pch_spi_setup;
master->transfer = pch_spi_transfer;
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 2d65b16..1041cb8 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -936,6 +936,8 @@ struct spi_master *spi_alloc_master(struct device *dev, unsigned size)
return NULL;
device_initialize(&master->dev);
+ master->bus_num = -1;
+ master->num_chipselect = 1;
master->dev.class = &spi_master_class;
master->dev.parent = get_device(dev);
spi_master_set_devdata(master, &master[1]);
--
1.7.9.5
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists