int nextcount;
unsigned long *oops_page_used;
+ unsigned long oops_buf_busy;
void *oops_buf;
} oops_cxt;
u32 *hdr;
int ret;
+ if (test_and_set_bit(0, &cxt->oops_buf_busy))
+ return;
+
/* Add mtdoops header to the buffer */
hdr = cxt->oops_buf;
hdr[0] = cxt->nextcount;
record_size, &retlen, cxt->oops_buf);
if (ret == -EOPNOTSUPP) {
printk(KERN_ERR "mtdoops: Cannot write from panic without panic_write\n");
- return;
+ goto out;
}
} else
ret = mtd_write(mtd, cxt->nextpage * record_size,
memset(cxt->oops_buf, 0xff, record_size);
mtdoops_inc_counter(cxt);
+out:
+ clear_bit(0, &cxt->oops_buf_busy);
}
static void mtdoops_workfunc_write(struct work_struct *work)
if (reason == KMSG_DUMP_OOPS && !dump_oops)
return;
+ if (test_and_set_bit(0, &cxt->oops_buf_busy))
+ return;
kmsg_dump_get_buffer(dumper, true, cxt->oops_buf + MTDOOPS_HEADER_SIZE,
record_size - MTDOOPS_HEADER_SIZE, NULL);
+ clear_bit(0, &cxt->oops_buf_busy);
if (reason != KMSG_DUMP_OOPS) {
/* Panics must be written immediately */
return -ENOMEM;
}
memset(cxt->oops_buf, 0xff, record_size);
+ cxt->oops_buf_busy = 0;
INIT_WORK(&cxt->work_erase, mtdoops_workfunc_erase);
INIT_WORK(&cxt->work_write, mtdoops_workfunc_write);