[PATCH] rapidio: Fix sysfs config attribute to access 16MB of maint space
From: Alexandre Bounine <hidden>
Date: 2011-02-25 18:28:21
Also in:
lkml
Subsystem:
rapidio subsystem, the rest · Maintainers:
Matt Porter, Alexandre Bounine, Linus Torvalds
Fixes sysfs config attribute to allow access to entire 16MB maintenance space of RapidIO devices. Signed-off-by: Alexandre Bounine <redacted> Cc: Kumar Gala <redacted> Cc: Matt Porter <mporter@kernel.crashing.org> Cc: Li Yang <redacted> Cc: Thomas Moll <redacted> Cc: Micha Nelissen <redacted> --- drivers/rapidio/rio-sysfs.c | 12 ++++++------ include/linux/rio_regs.h | 4 +++- 2 files changed, 9 insertions(+), 7 deletions(-)
diff --git a/drivers/rapidio/rio-sysfs.c b/drivers/rapidio/rio-sysfs.c
index e3ebfec..c04dbc7 100644
--- a/drivers/rapidio/rio-sysfs.c
+++ b/drivers/rapidio/rio-sysfs.c@@ -78,9 +78,9 @@ rio_read_config(struct file *filp, struct kobject *kobj, /* Several chips lock up trying to read undefined config space */ if (capable(CAP_SYS_ADMIN)) - size = 0x200000; + size = RIO_MAINT_SPACE_SZ; - if (off > size) + if (off >= size) return 0; if (off + count > size) { size -= off;
@@ -148,10 +148,10 @@ rio_write_config(struct file *filp, struct kobject *kobj, loff_t init_off = off; u8 *data = (u8 *) buf; - if (off > 0x200000) + if (off >= RIO_MAINT_SPACE_SZ) return 0; - if (off + count > 0x200000) { - size = 0x200000 - off; + if (off + count > RIO_MAINT_SPACE_SZ) { + size = RIO_MAINT_SPACE_SZ - off; count = size; }
@@ -201,7 +201,7 @@ static struct bin_attribute rio_config_attr = { .name = "config", .mode = S_IRUGO | S_IWUSR, }, - .size = 0x200000, + .size = RIO_MAINT_SPACE_SZ, .read = rio_read_config, .write = rio_write_config, };
diff --git a/include/linux/rio_regs.h b/include/linux/rio_regs.h
index d63dcba..9026b30 100644
--- a/include/linux/rio_regs.h
+++ b/include/linux/rio_regs.h@@ -14,10 +14,12 @@ #define LINUX_RIO_REGS_H /* - * In RapidIO, each device has a 2MB configuration space that is + * In RapidIO, each device has a 16MB configuration space that is * accessed via maintenance transactions. Portions of configuration * space are standardized and/or reserved. */ +#define RIO_MAINT_SPACE_SZ 0x1000000 /* 16MB of RapidIO mainenance space */ + #define RIO_DEV_ID_CAR 0x00 /* [I] Device Identity CAR */ #define RIO_DEV_INFO_CAR 0x04 /* [I] Device Information CAR */ #define RIO_ASM_ID_CAR 0x08 /* [I] Assembly Identity CAR */
--
1.7.3.1