ssize_t ssb_attr_sprom_show(struct ssb_bus *bus, char *buf,
int (*sprom_read)(struct ssb_bus *bus, u16 *sprom))
{
u16 *sprom;
int err = -ENOMEM;
ssize_t count = 0;
size_t sprom_size_words = bus->sprom_size;
sprom = kcalloc(sprom_size_words, sizeof(u16), GFP_KERNEL);
if (!sprom)
goto out;
err = -ERESTARTSYS;
if (mutex_lock_interruptible(&bus->sprom_mutex))
goto out_kfree;
err = sprom_read(bus, sprom);
mutex_unlock(&bus->sprom_mutex);
if (!err)
count = sprom2hex(sprom, buf, PAGE_SIZE, sprom_size_words);
out_kfree:
kfree(sprom);
out:
return err ? err : count;
}
/* Common sprom device-attribute show-handler */
ssize_t ssb_attr_sprom_show(struct ssb_bus *bus, char *buf,
int (*sprom_read)(struct ssb_bus *bus, u16 *sprom))
{
u16 *sprom;
int err = -ENOMEM;
ssize_t count = 0;
size_t sprom_size_words = bus->sprom_size;
sprom = kcalloc(sprom_size_words, sizeof(u16), GFP_KERNEL);
if (!sprom)
goto out;
/* Use interruptible locking, as the SPROM write might
* be holding the lock for several seconds. So allow userspace
* to cancel operation. */
err = -ERESTARTSYS;
if (mutex_lock_interruptible(&bus->sprom_mutex))
goto out_kfree;
err = sprom_read(bus, sprom);
mutex_unlock(&bus->sprom_mutex);
if (!err)
count = sprom2hex(sprom, buf, PAGE_SIZE, sprom_size_words);
out_kfree:
kfree(sprom);
out:
return err ? err : count;
}
static ssize_t bcm43xx_attr_sprom_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct bcm43xx_private *bcm = dev_to_bcm(dev);
u16 *sprom;
unsigned long flags;
int err;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
assert(BCM43xx_SPROM_SIZE * sizeof(u16) <= PAGE_SIZE);
sprom = kmalloc(BCM43xx_SPROM_SIZE * sizeof(*sprom),
GFP_KERNEL);
if (!sprom)
return -ENOMEM;
bcm43xx_lock_mmio(bcm, flags);
assert(bcm->initialized);
err = bcm43xx_sprom_read(bcm, sprom);
if (!err)
err = sprom2hex(sprom, buf, PAGE_SIZE);
bcm43xx_unlock_mmio(bcm, flags);
kfree(sprom);
return err;
}