[MIPS] Lasat: sysctl fixup
LASAT's sysctl interface was broken, it failed a check during boot because
a single entry had a sysctl number and the rest were unnumbered. When I
fixed it I noticed that the whole sysctl file needed a spring clean, it was
using mutexes where it wasn't needed (it's only needed to protect during
writes to the EEPROM), so I moved that stuff out and generally cleaned the
whole thing up.
So now, LASAT's sysctl/proc interface is working again.
Signed-off-by: Thomas Horsten <thomas@horsten.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/lasat/sysctl.c b/arch/mips/lasat/sysctl.c
index 389336c..866881e 100644
--- a/arch/mips/lasat/sysctl.c
+++ b/arch/mips/lasat/sysctl.c
@@ -29,15 +29,13 @@
#include <linux/string.h>
#include <linux/net.h>
#include <linux/inet.h>
-#include <linux/mutex.h>
#include <linux/uaccess.h>
#include <asm/time.h>
-#include "sysctl.h"
+#ifdef CONFIG_DS1603
#include "ds1603.h"
-
-static DEFINE_MUTEX(lasat_info_mutex);
+#endif
/* Strategy function to write EEPROM after changing string entry */
int sysctl_lasatstring(ctl_table *table, int *name, int nlen,
@@ -46,18 +44,15 @@
{
int r;
- mutex_lock(&lasat_info_mutex);
r = sysctl_string(table, name,
nlen, oldval, oldlenp, newval, newlen);
- if (r < 0) {
- mutex_unlock(&lasat_info_mutex);
+ if (r < 0)
return r;
- }
+
if (newval && newlen)
lasat_write_eeprom_info();
- mutex_unlock(&lasat_info_mutex);
- return 1;
+ return 0;
}
@@ -67,14 +62,11 @@
{
int r;
- mutex_lock(&lasat_info_mutex);
r = proc_dostring(table, write, filp, buffer, lenp, ppos);
- if ((!write) || r) {
- mutex_unlock(&lasat_info_mutex);
+ if ((!write) || r)
return r;
- }
+
lasat_write_eeprom_info();
- mutex_unlock(&lasat_info_mutex);
return 0;
}
@@ -85,28 +77,24 @@
{
int r;
- mutex_lock(&lasat_info_mutex);
r = proc_dointvec(table, write, filp, buffer, lenp, ppos);
- if ((!write) || r) {
- mutex_unlock(&lasat_info_mutex);
+ if ((!write) || r)
return r;
- }
+
lasat_write_eeprom_info();
- mutex_unlock(&lasat_info_mutex);
return 0;
}
+#ifdef CONFIG_DS1603
static int rtctmp;
-#ifdef CONFIG_DS1603
/* proc function to read/write RealTime Clock */
int proc_dolasatrtc(ctl_table *table, int write, struct file *filp,
void *buffer, size_t *lenp, loff_t *ppos)
{
int r;
- mutex_lock(&lasat_info_mutex);
if (!write) {
rtctmp = read_persistent_clock();
/* check for time < 0 and set to 0 */
@@ -114,12 +102,11 @@
rtctmp = 0;
}
r = proc_dointvec(table, write, filp, buffer, lenp, ppos);
- if ((!write) || r) {
- mutex_unlock(&lasat_info_mutex);
+ if (r)
return r;
- }
- rtc_mips_set_mmss(rtctmp);
- mutex_unlock(&lasat_info_mutex);
+
+ if (write)
+ rtc_mips_set_mmss(rtctmp);
return 0;
}
@@ -132,17 +119,14 @@
{
int r;
- mutex_lock(&lasat_info_mutex);
r = sysctl_intvec(table, name, nlen, oldval, oldlenp, newval, newlen);
- if (r < 0) {
- mutex_unlock(&lasat_info_mutex);
+ if (r < 0)
return r;
- }
+
if (newval && newlen)
lasat_write_eeprom_info();
- mutex_unlock(&lasat_info_mutex);
- return 1;
+ return 0;
}
#ifdef CONFIG_DS1603
@@ -153,50 +137,27 @@
{
int r;
- mutex_lock(&lasat_info_mutex);
rtctmp = read_persistent_clock();
if (rtctmp < 0)
rtctmp = 0;
r = sysctl_intvec(table, name, nlen, oldval, oldlenp, newval, newlen);
- if (r < 0) {
- mutex_unlock(&lasat_info_mutex);
+ if (r < 0)
return r;
- }
if (newval && newlen)
rtc_mips_set_mmss(rtctmp);
- mutex_unlock(&lasat_info_mutex);
- return 1;
+ return r;
}
#endif
#ifdef CONFIG_INET
-static char lasat_bcastaddr[16];
-
-void update_bcastaddr(void)
-{
- unsigned int ip;
-
- ip = (lasat_board_info.li_eeprom_info.ipaddr &
- lasat_board_info.li_eeprom_info.netmask) |
- ~lasat_board_info.li_eeprom_info.netmask;
-
- sprintf(lasat_bcastaddr, "%d.%d.%d.%d",
- (ip) & 0xff,
- (ip >> 8) & 0xff,
- (ip >> 16) & 0xff,
- (ip >> 24) & 0xff);
-}
-
-static char proc_lasat_ipbuf[32];
-
-/* Parsing of IP address */
int proc_lasat_ip(ctl_table *table, int write, struct file *filp,
void *buffer, size_t *lenp, loff_t *ppos)
{
unsigned int ip;
char *p, c;
int len;
+ char ipbuf[32];
if (!table->data || !table->maxlen || !*lenp ||
(*ppos && !write)) {
@@ -204,117 +165,88 @@
return 0;
}
- mutex_lock(&lasat_info_mutex);
if (write) {
len = 0;
p = buffer;
while (len < *lenp) {
- if (get_user(c, p++)) {
- mutex_unlock(&lasat_info_mutex);
+ if (get_user(c, p++))
return -EFAULT;
- }
if (c == 0 || c == '\n')
break;
len++;
}
- if (len >= sizeof(proc_lasat_ipbuf)-1)
- len = sizeof(proc_lasat_ipbuf) - 1;
- if (copy_from_user(proc_lasat_ipbuf, buffer, len)) {
- mutex_unlock(&lasat_info_mutex);
+ if (len >= sizeof(ipbuf)-1)
+ len = sizeof(ipbuf) - 1;
+ if (copy_from_user(ipbuf, buffer, len))
return -EFAULT;
- }
- proc_lasat_ipbuf[len] = 0;
+ ipbuf[len] = 0;
*ppos += *lenp;
/* Now see if we can convert it to a valid IP */
- ip = in_aton(proc_lasat_ipbuf);
+ ip = in_aton(ipbuf);
*(unsigned int *)(table->data) = ip;
lasat_write_eeprom_info();
} else {
ip = *(unsigned int *)(table->data);
- sprintf(proc_lasat_ipbuf, "%d.%d.%d.%d",
+ sprintf(ipbuf, "%d.%d.%d.%d",
(ip) & 0xff,
(ip >> 8) & 0xff,
(ip >> 16) & 0xff,
(ip >> 24) & 0xff);
- len = strlen(proc_lasat_ipbuf);
+ len = strlen(ipbuf);
if (len > *lenp)
len = *lenp;
if (len)
- if (copy_to_user(buffer, proc_lasat_ipbuf, len)) {
- mutex_unlock(&lasat_info_mutex);
+ if (copy_to_user(buffer, ipbuf, len))
return -EFAULT;
- }
if (len < *lenp) {
- if (put_user('\n', ((char *) buffer) + len)) {
- mutex_unlock(&lasat_info_mutex);
+ if (put_user('\n', ((char *) buffer) + len))
return -EFAULT;
- }
len++;
}
*lenp = len;
*ppos += len;
}
- update_bcastaddr();
- mutex_unlock(&lasat_info_mutex);
return 0;
}
-#endif /* defined(CONFIG_INET) */
+#endif
-static int sysctl_lasat_eeprom_value(ctl_table *table, int *name, int nlen,
+static int sysctl_lasat_prid(ctl_table *table, int *name, int nlen,
void *oldval, size_t *oldlenp,
void *newval, size_t newlen)
{
int r;
- mutex_lock(&lasat_info_mutex);
r = sysctl_intvec(table, name, nlen, oldval, oldlenp, newval, newlen);
- if (r < 0) {
- mutex_unlock(&lasat_info_mutex);
+ if (r < 0)
return r;
- }
-
if (newval && newlen) {
- if (name && *name == LASAT_PRID)
- lasat_board_info.li_eeprom_info.prid = *(int *)newval;
-
+ lasat_board_info.li_eeprom_info.prid = *(int *)newval;
lasat_write_eeprom_info();
lasat_init_board_info();
}
- mutex_unlock(&lasat_info_mutex);
-
return 0;
}
-int proc_lasat_eeprom_value(ctl_table *table, int write, struct file *filp,
+int proc_lasat_prid(ctl_table *table, int write, struct file *filp,
void *buffer, size_t *lenp, loff_t *ppos)
{
int r;
- mutex_lock(&lasat_info_mutex);
r = proc_dointvec(table, write, filp, buffer, lenp, ppos);
- if ((!write) || r) {
- mutex_unlock(&lasat_info_mutex);
+ if (r < 0)
return r;
+ if (write) {
+ lasat_board_info.li_eeprom_info.prid =
+ lasat_board_info.li_prid;
+ lasat_write_eeprom_info();
+ lasat_init_board_info();
}
- if (filp && filp->f_path.dentry) {
- if (!strcmp(filp->f_path.dentry->d_name.name, "prid"))
- lasat_board_info.li_eeprom_info.prid =
- lasat_board_info.li_prid;
- if (!strcmp(filp->f_path.dentry->d_name.name, "debugaccess"))
- lasat_board_info.li_eeprom_info.debugaccess =
- lasat_board_info.li_debugaccess;
- }
- lasat_write_eeprom_info();
- mutex_unlock(&lasat_info_mutex);
-
return 0;
}
extern int lasat_boot_to_service;
-#ifdef CONFIG_SYSCTL
-
static ctl_table lasat_table[] = {
{
.ctl_name = CTL_UNNUMBERED,
@@ -349,8 +281,8 @@
.data = &lasat_board_info.li_prid,
.maxlen = sizeof(int),
.mode = 0644,
- .proc_handler = &proc_lasat_eeprom_value,
- .strategy = &sysctl_lasat_eeprom_value
+ .proc_handler = &proc_lasat_prid,
+ .strategy = &sysctl_lasat_prid
},
#ifdef CONFIG_INET
{
@@ -363,7 +295,7 @@
.strategy = &sysctl_lasat_intvec
},
{
- .ctl_name = LASAT_NETMASK,
+ .ctl_name = CTL_UNNUMBERED,
.procname = "netmask",
.data = &lasat_board_info.li_eeprom_info.netmask,
.maxlen = sizeof(int),
@@ -371,15 +303,6 @@
.proc_handler = &proc_lasat_ip,
.strategy = &sysctl_lasat_intvec
},
- {
- .ctl_name = CTL_UNNUMBERED,
- .procname = "bcastaddr",
- .data = &lasat_bcastaddr,
- .maxlen = sizeof(lasat_bcastaddr),
- .mode = 0600,
- .proc_handler = &proc_dostring,
- .strategy = &sysctl_string
- },
#endif
{
.ctl_name = CTL_UNNUMBERED,
@@ -417,7 +340,7 @@
.data = &lasat_board_info.li_namestr,
.maxlen = sizeof(lasat_board_info.li_namestr),
.mode = 0444,
- .proc_handler = &proc_dostring,
+ .proc_handler = &proc_dostring,
.strategy = &sysctl_string
},
{
@@ -448,9 +371,12 @@
lasat_table_header =
register_sysctl_table(lasat_root_table);
+ if (!lasat_table_header) {
+ printk(KERN_ERR "Unable to register LASAT sysctl\n");
+ return -ENOMEM;
+ }
return 0;
}
__initcall(lasat_register_sysctl);
-#endif /* CONFIG_SYSCTL */