/* 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; }
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; }